U.S. Water Systems with High F Levels
Database of drinking water systems with high levels of naturally occurring fluoride; searchable by state.
Iowa (2020)
From the CDC 2020 Fluoridation Status Report
All Water Systems in 2020
| PWS ID | PWS Name | County | Population Served | Fluoridated | Fluoride Conc. |
|---|---|---|---|---|---|
| IA-5620046 | Donnellson Municipal Water Works | Lee (Primary) | 847 | Yes | 3.40 |
| IA-4271901 | Quakerdale | Hardin (Primary) | 56 | Yes | 2.68 |
| IA-9425011 | Dayton Municipal Water Supply | Webster (Primary) | 782 | Yes | 2.67 |
| IA-1773097 | Rockwell Water Supply | Cerro Gordo (Primary) | 965 | Yes | 2.52 |
| IA-4051002 | Stratford Municipal Water Department | Hamilton (Primary) | 694 | Yes | 2.47 |
| IA-9133601 | North American Mobile Home Park | Warren (Primary) | 217 | Yes | 2.40 |
| IA-9133075 | Indianola Water Supply | Warren (Primary) | 13735 | Yes | 2.40 |
| IA-4045090 | Stanhope Water Department | Hamilton (Primary) | 374 | Yes | 2.37 |
| IA-3570037 | Sheffield Water Supply | Franklin (Primary) | 1089 | Yes | 2.30 |
| IA-3525079 | Coulter Water Supply | Franklin (Primary) | 261 | Yes | 2.30 |
| IA-4003012 | Blairsburg Water Supply | Hamilton (Primary) | 200 | Yes | 2.30 |
| IA-9436095 | Gowrie Municipal Utilities Water Department | Webster (Primary) | 967 | Yes | 2.28 |
| IA-3549026 | Hansell Water Department | Franklin (Primary) | 91 | Yes | 2.22 |
| IA-9427082 | Duncombe Water Supply | Webster (Primary) | 384 | Yes | 2.22 |
| IA-9442027 | Harcourt Water Supply | Webster (Primary) | 285 | Yes | 2.20 |
| IA-9464008 | Otho Water Supply | Webster (Primary) | 518 | Yes | 2.16 |
| IA-7872062 | Walnut Municipal Utilities | Pottawattamie (Primary) | 729 | Yes | 2.11 |
| IA-9433312 | Becker Water and Road | Webster (Primary) | 56 | Yes | 2.10 |
| IA-9400801 | Central Water Works | Webster (Primary) | 25 | Yes | 2.09 |
| IA-9433336 | Timberlane Addition | Webster (Primary) | 50 | Yes | 2.08 |
| IA-4039071 | Randall Water Supply | Hamilton (Primary) | 161 | Yes | 2.07 |
| IA-9921050 | Dows Water Supply | Wright (Primary) | 509 | Yes | 2.06 |
| IA-1320039 | Farnhamville Water Supply | Calhoun (Primary) | 355 | Yes | 2.01 |
| IA-4271062 | New Providence Water Supply | Hardin (Primary) | 212 | Yes | 2.00 |
| IA-1778008 | Swaledale Water Supply | Cerro Gordo (Primary) | 153 | Yes | 1.95 |
| IA-9405082 | Badger Water Supply | Webster (Primary) | 521 | Yes | 1.92 |
| IA-0607013 | Blairstown Water Supply | Benton (Primary) | 674 | Yes | 1.90 |
| IA-5857011 | Morning Sun Water Department | Louisa (Primary) | 777 | Yes | 1.90 |
| IA-8570001 | Roland Water Supply | Story (Primary) | 1193 | Yes | 1.90 |
| IA-1700352 | Oakwood Park Water Association | Cerro Gordo (Primary) | 23 | Yes | 1.88 |
| IA-9433600 | Woodland Acres | Webster (Primary) | 85 | Yes | 1.87 |
| IA-1781019 | Thornton Water Supply | Cerro Gordo (Primary) | 392 | Yes | 1.86 |
| IA-6300099 | Melcher-Dallas Water Supply | Marion (Primary) | 1197 | Yes | 1.84 |
| IA-4254061 | Hubbard Water Supply | Hardin (Primary) | 785 | Yes | 1.80 |
| IA-1700642 | Long Beach Mobile Park | Cerro Gordo (Primary) | 69 | Yes | 1.80 |
| IA-1940068 | Fredericksburg Water Supply | Chickasaw (Primary) | 865 | Yes | 1.79 |
| IA-3900301 | Lake Panorama Water Company | Guthrie (Primary) | 2044 | Yes | 1.77 |
| IA-1754073 | Meservey Water Supply | Cerro Gordo (Primary) | 238 | Yes | 1.75 |
| IA-9453071 | Lehigh Water Supply | Webster (Primary) | 387 | Yes | 1.72 |
| IA-0640030 | Keystone Water Supply | Benton (Primary) | 578 | Yes | 1.70 |
| IA-9641049 | Fort Atkinson Water Works | Winneshiek (Primary) | 366 | Yes | 1.70 |
| IA-3409066 | Colwell Water Supply | Floyd (Primary) | 68 | Yes | 1.70 |
| IA-6377701 | North Corp Water | Marion (Primary) | 116 | Yes | 1.70 |
| IA-6377046 | Pleasantville Water Works | Marion (Primary) | 1574 | Yes | 1.70 |
| IA-6380047 | Swan Water Works | Marion (Primary) | 67 | Yes | 1.70 |
| IA-3189001 | Worthington Water Supply | Dubuque (Primary) | 373 | Yes | 1.70 |
| IA-9417063 | Callender Water Supply | Webster (Primary) | 353 | Yes | 1.69 |
| IA-7707030 | Altoona Water Supply | Polk (Primary) | 13511 | Yes | 1.65 |
| IA-0653050 | Newhall Water Supply | Benton (Primary) | 813 | Yes | 1.64 |
| IA-3870073 | Reinbeck Water Supply | Grundy (Primary) | 1546 | Yes | 1.60 |
| IA-8584000 | Story City Water Department | Story (Primary) | 3188 | Yes | 1.60 |
| IA-7073010 | West Liberty Water Utility | Muscatine (Primary) | 3508 | Yes | 1.60 |
| IA-3375001 | Waucoma Water Supply | Fayette (Primary) | 239 | Yes | 1.50 |
| IA-4490091 | Wayland Water Supply | Henry (Primary) | 898 | Yes | 1.50 |
| IA-8503305 | Squaw Valley South Subdivision | Story (Primary) | 151 | Yes | 1.50 |
| IA-4458060 | New London Municipal Water Department | Henry (Primary) | 1786 | Yes | 1.50 |
| IA-7856084 | Oakland Municipal Water Utility | Pottawattamie (Primary) | 1419 | Yes | 1.50 |
| IA-4201001 | Ackley Municipal Water Works | Hardin (Primary) | 1476 | Yes | 1.50 |
| IA-7833025 | Hancock Water Supply | Pottawattamie (Primary) | 182 | Yes | 1.50 |
| IA-2835056 | Hopkinton Municipal Utilities | Delaware (Primary) | 584 | Yes | 1.40 |
| IA-1838032 | Marcus Water Supply | Cherokee (Primary) | 1045 | Yes | 1.40 |
| IA-4609028 | Bode Municipal Water Supply | Humboldt (Primary) | 293 | Yes | 1.40 |
| IA-4063094 | Webster City Water Supply | Hamilton (Primary) | 7503 | Yes | 1.40 |
| IA-7589008 | Westfield Water Supply | Plymouth (Primary) | 130 | Yes | 1.40 |
| IA-5470083 | Richland Water Supply | Keokuk (Primary) | 543 | Yes | 1.39 |
| IA-4070022 | Williams Water Supply | Hamilton (Primary) | 327 | Yes | 1.38 |
| IA-9905003 | Belmond Water Supply | Wright (Primary) | 2208 | Yes | 1.38 |
| IA-1376098 | Rockwell City Water Supply | Calhoun (Primary) | 1593 | Yes | 1.36 |
| IA-7930008 | Grinnell Water Department | Poweshiek (Primary) | 8621 | Yes | 1.35 |
| IA-5252072 | North Liberty Water Supply | Johnson (Primary) | 17014 | Yes | 1.34 |
| IA-4858070 | North English Water Department | Iowa (Primary) | 1000 | Yes | 1.30 |
| IA-6300800 | Pershing Utilities Corporation | Marion (Primary) | 429 | Yes | 1.30 |
| IA-4478023 | Salem Water Supply | Henry (Primary) | 356 | Yes | 1.30 |
| IA-5478074 | South English Water Supply | Keokuk (Primary) | 230 | Yes | 1.30 |
| IA-6484093 | State Center Municipal Water Department | Marshall (Primary) | 1364 | Yes | 1.30 |
| IA-9433050 | Fort Dodge Water Supply | Webster (Primary) | 24331 | Yes | 1.30 |
| IA-0625078 | Garrison Water Supply | Benton (Primary) | 345 | Yes | 1.30 |
| IA-4425032 | Hillsboro Water Works | Henry (Primary) | 217 | Yes | 1.30 |
| IA-1351027 | Manson Water Supply | Calhoun (Primary) | 1577 | Yes | 1.30 |
| IA-9138041 | Lacona Water Supply | Warren (Primary) | 359 | Yes | 1.30 |
| IA-6342036 | Knoxville Water Works | Marion (Primary) | 7427 | Yes | 1.30 |
| IA-9203007 | Ainsworth Water Works | Washington (Primary) | 527 | Yes | 1.30 |
| IA-5282307 | Chain Ridge Subdivision | Linn (Primary) | 23 | Yes | 1.30 |
| IA-2330036 | DeWitt Water Supply | Clinton (Primary) | 4945 | Yes | 1.30 |
| IA-5440028 | Keota Water Department | Keokuk (Primary) | 938 | Yes | 1.22 |
| IA-5148079 | Libertyville Water Works | Jefferson (Primary) | 293 | Yes | 1.20 |
| IA-5157091 | Lockridge Municipal Water Supply | Jefferson (Primary) | 370 | Yes | 1.20 |
| IA-5131705 | Jefferson County Rural Water District | Jefferson (Primary) | 613 | Yes | 1.20 |
| IA-3135018 | Farley Water Supply | Dubuque (Primary) | 1428 | Yes | 1.20 |
| IA-3130091 | Dyersville Municipal Water Company | Dubuque (Primary) | 3771 | Yes | 1.20 |
| IA-5131033 | Fairfield Water Supply | Jefferson (Primary) | 8835 | Yes | 1.20 |
| IA-2809055 | Colesburg Water Supply | Delaware (Primary) | 375 | Yes | 1.20 |
| IA-8909011 | Birmingham Water Supply | Van Buren (Primary) | 416 | Yes | 1.20 |
| IA-8676027 | Toledo Water Supply | Tama (Primary) | 2175 | Yes | 1.20 |
| IA-0670043 | Shellsburg Water Supply | Benton (Primary) | 915 | Yes | 1.20 |
| IA-4475001 | Rome Water Supply | Henry (Primary) | 109 | Yes | 1.20 |
| IA-3423069 | Nora Springs Water Supply | Floyd (Primary) | 1337 | Yes | 1.20 |
| IA-5718006 | Center Point Water Supply | Linn (Primary) | 2254 | Yes | 1.18 |
| IA-1800900 | Cherokee Rural Water – Mill Creek Subsystem | Cherokee (Primary) | 1321 | Yes | 1.14 |
| IA-1833060 | Larrabee Municipal Water Works | Cherokee (Primary) | 125 | Yes | 1.14 |
| IA-1849071 | Meriden Municipal Water Supply | Cherokee (Primary) | 148 | Yes | 1.14 |
| IA-1031044 | Hazleton Water Supply | Buchanan (Primary) | 765 | Yes | 1.12 |
| IA-0743057 | La Porte City Utilities | Black Hawk (Primary) | 2123 | Yes | 1.11 |
| IA-5442029 | Keswick Water System | Keokuk (Primary) | 235 | Yes | 1.10 |
| IA-1335001 | Jolley Water Supply | Calhoun (Primary) | 38 | Yes | 1.10 |
| IA-5432042 | Hedrick Water Supply | Keokuk (Primary) | 710 | Yes | 1.10 |
| IA-5428031 | Harper Water Supply | Keokuk (Primary) | 106 | Yes | 1.10 |
| IA-3730098 | Grand Junction Municipal Water Department | Greene (Primary) | 766 | Yes | 1.10 |
| IA-9214085 | Crawfordsville Water Supply | Washington (Primary) | 245 | Yes | 1.10 |
| IA-9053004 | Eldon Water Supply | Wapello (Primary) | 861 | Yes | 1.10 |
| IA-5417026 | Delta Water Supply | Keokuk (Primary) | 310 | Yes | 1.10 |
| IA-3800600 | Dietrick Mobile Home Park | Grundy (Primary) | 164 | Yes | 1.10 |
| IA-9209043 | Brighton Municipal Water Supply | Washington (Primary) | 613 | Yes | 1.10 |
| IA-9003006 | Agency Water Works | Wapello (Primary) | 593 | Yes | 1.10 |
| IA-7548072 | Merrill Municipal Water Supply | Plymouth (Primary) | 703 | Yes | 1.10 |
| IA-4453016 | Mount Pleasant Municipal Utilities | Henry (Primary) | 8100 | Yes | 1.10 |
| IA-4465093 | Olds Municipal Water Department | Henry (Primary) | 213 | Yes | 1.10 |
| IA-1381073 | Somers Water Works | Calhoun (Primary) | 110 | Yes | 1.10 |
| IA-4984086 | Springbrook Water Department | Jackson (Primary) | 134 | Yes | 1.10 |
| IA-9486052 | Vincent Water Supply | Webster (Primary) | 162 | Yes | 1.10 |
| IA-4453318 | Westwood Water Supply | Henry (Primary) | 104 | Yes | 1.10 |
| IA-5493016 | What Cheer Water Supply | Keokuk (Primary) | 600 | Yes | 1.10 |
| IA-8681030 | Traer Municipal Water Plant | Tama (Primary) | 1582 | Yes | 1.09 |
| IA-5300947 | Anamosa State Penitentiary | Jones (Primary) | 1143 | Yes | 1.06 |
| IA-2320062 | Calamus Water Supply | Clinton (Primary) | 408 | Yes | 1.05 |
| IA-5288021 | Tiffin Water Supply | Johnson (Primary) | 1809 | Yes | 1.04 |
| IA-4680018 | Thor Water Works | Humboldt (Primary) | 173 | Yes | 1.00 |
| IA-1694000 | West Branch Water Works | Cedar (Primary) | 2157 | Yes | 1.00 |
| IA-5225320 | Woodland Ridge Subdivision | Johnson (Primary) | 46 | Yes | 1.00 |
| IA-0790601 | Prairie View Acres Mobile Home Park | Black Hawk (Primary) | 74 | Yes | 1.00 |
| IA-5500838 | Oak Lake Maintenance, Inc. | Kossuth (Primary) | 93 | Yes | 1.00 |
| IA-7736301 | Park View Village | Polk (Primary) | 731 | Yes | 1.00 |
| IA-4509024 | Chester Water Supply | Howard (Primary) | 118 | Yes | 1.00 |
| IA-1716076 | Clear Lake Water Department | Cerro Gordo (Primary) | 7226 | Yes | 1.00 |
| IA-1817045 | Cleghorn Water Supply | Cherokee (Primary) | 230 | Yes | 1.00 |
| IA-7736011 | Grimes Water Supply | Polk (Primary) | 10614 | Yes | 1.00 |
| IA-7700853 | Goulds Heights Water Service Company | Polk (Primary) | 813 | Yes | 1.00 |
| IA-7568079 | Remsen Municipal Utilities | Plymouth (Primary) | 1554 | Yes | 0.99 |
| IA-5225328 | Lacina Meadows Residential Subdivision | Johnson (Primary) | 39 | Yes | 0.96 |
| IA-2391001 | Welton Water Supply | Clinton (Primary) | 153 | Yes | 0.95 |
| IA-5592098 | Wesley Water Supply | Kossuth (Primary) | 362 | Yes | 0.95 |
| IA-5800601 | Cedar River Trailer Park | Louisa (Primary) | 49 | Yes | 0.92 |
| IA-1946078 | Ionia Water Supply | Chickasaw (Primary) | 270 | Yes | 0.91 |
| IA-9271068 | Washington Water Department | Washington (Primary) | 6751 | Yes | 0.91 |
| IA-3880001 | Stout Water Supply | Grundy (Primary) | 208 | Yes | 0.91 |
| IA-9680085 | Ridgeway, City of | Winneshiek (Primary) | 293 | Yes | 0.91 |
| IA-4283067 | Radcliffe Municipal Water | Hardin (Primary) | 510 | Yes | 0.91 |
| IA-6668001 | Orchard Water Works | Mitchell (Primary) | 66 | Yes | 0.90 |
| IA-3353088 | Oelwein Municipal Water Works | Fayette (Primary) | 5961 | Yes | 0.90 |
| IA-3165014 | New Vienna Water Supply | Dubuque (Primary) | 378 | Yes | 0.90 |
| IA-4493028 | Winfield Municipal Water Department | Henry (Primary) | 1050 | Yes | 0.90 |
| IA-9200601 | Linn Hollow Mobile Home Park | Washington (Primary) | 111 | Yes | 0.90 |
| IA-9615064 | Calmar Water Supply | Winneshiek (Primary) | 978 | Yes | 0.90 |
| IA-1011001 | Brandon Water Supply | Buchanan (Primary) | 287 | Yes | 0.90 |
| IA-2220002 | Edgewood Water Supply | Clayton (Primary) | 803 | Yes | 0.90 |
| IA-4525017 | Elma Water Supply | Howard (Primary) | 507 | Yes | 0.90 |
| IA-9721076 | Correctionville Water Supply | Woodbury (Primary) | 780 | Yes | 0.88 |
| IA-7428022 | Rodman Water System | Palo Alto (Primary) | 42 | Yes | 0.88 |
| IA-5758021 | Mount Vernon Water Supply | Linn (Primary) | 4187 | Yes | 0.87 |
| IA-1880073 | Washta Water Supply | Cherokee (Primary) | 230 | Yes | 0.87 |
| IA-3118080 | Cascade Municipal Water Supply | Dubuque (Primary) | 2025 | Yes | 0.87 |
| IA-9433324 | Lakewood Utilities | Webster (Primary) | 186 | Yes | 0.86 |
| IA-4155035 | Klemme Water Works | Hancock (Primary) | 471 | Yes | 0.85 |
| IA-5510060 | Burt Water Supply | Kossuth (Primary) | 497 | Yes | 0.84 |
| IA-5588026 | Titonka Water Supply | Kossuth (Primary) | 452 | Yes | 0.84 |
| IA-5500822 | Southdale Homeowners Association | Kossuth (Primary) | 67 | Yes | 0.83 |
| IA-1240081 | Dumont Water Supply | Butler (Primary) | 592 | Yes | 0.83 |
| IA-4027010 | Jewell Water Supply | Hamilton (Primary) | 1129 | Yes | 0.82 |
| IA-9433349 | Deerwood Estates Utilities | Webster (Primary) | 177 | Yes | 0.81 |
| IA-1025031 | Fairbank Water Supply | Buchanan (Primary) | 1039 | Yes | 0.80 |
| IA-5507085 | Bancroft Water Supply | Kossuth (Primary) | 691 | Yes | 0.80 |
| IA-6055077 | Lester Water Supply | Lyon (Primary) | 274 | Yes | 0.80 |
| IA-6050059 | Larchwood Water Supply | Lyon (Primary) | 805 | Yes | 0.80 |
| IA-6000755 | Lyon-Sioux Rural Water System – Big Sioux | Sioux (Primary) | 1157 | Yes | 0.80 |
| IA-0680041 | Urbana Water Supply | Benton (Primary) | 1362 | Yes | 0.80 |
| IA-0970006 | Sumner Water Supply | Bremer (Primary) | 1908 | Yes | 0.80 |
| IA-5200802 | Kessler’s Homeowners Association | Johnson (Primary) | 60 | Yes | 0.79 |
| IA-8133009 | Lytton Water Department | Calhoun (Primary) | 297 | Yes | 0.78 |
| IA-5208071 | Coralville Municipal Water System | Johnson (Primary) | 17568 | Yes | 0.78 |
| IA-9725094 | Cushing Water Supply | Woodbury (Primary) | 204 | Yes | 0.77 |
| IA-1374086 | Rinard Water Supply | Calhoun (Primary) | 53 | Yes | 0.77 |
| IA-2328024 | Delmar Water Supply | Clinton (Primary) | 488 | Yes | 0.76 |
| IA-0975032 | Tripoli Water Supply | Bremer (Primary) | 1258 | Yes | 0.75 |
| IA-1281028 | Parkersburg Water Supply | Butler (Primary) | 1742 | Yes | 0.73 |
| IA-9433302 | Deer Creek Subdivision – Fort Dodge | Webster (Primary) | 46 | Yes | 0.73 |
| IA-9420027 | Clare Water Department | Webster (Primary) | 136 | Yes | 0.72 |
| IA-5307048 | Anamosa Municipal Water Supply | Jones (Primary) | 3980 | Yes | 0.72 |
| IA-9704060 | Anthon Municipal Water System | Woodbury (Primary) | 532 | Yes | 0.72 |
| IA-5260601 | Sleepy Hollow Enterprises | Johnson (Primary) | 65 | Yes | 0.72 |
| IA-6677089 | Stacyville Water Supply | Mitchell (Primary) | 466 | Yes | 0.71 |
| IA-1811020 | Cherokee Water Supply – Plant 1 | Cherokee (Primary) | 4909 | Yes | 0.71 |
| IA-0410026 | Cincinnati Municipal Water Company | Appanoose (Primary) | 332 | Yes | 0.70 |
| IA-6415046 | Clemons Water Supply | Marshall (Primary) | 138 | Yes | 0.70 |
| IA-7329029 | Clarinda Water Plant | Page (Primary) | 4480 | Yes | 0.70 |
| IA-9909031 | Clarion Water Supply | Wright (Primary) | 2648 | Yes | 0.70 |
| IA-0220075 | Corning Municipal Utilities | Adams (Primary) | 1519 | Yes | 0.70 |
| IA-3809067 | Conrad Water Supply | Grundy (Primary) | 1030 | Yes | 0.70 |
| IA-7720051 | Clive Water Department | Polk (Primary) | 16266 | Yes | 0.70 |
| IA-7341059 | College Springs Water Supply | Page (Primary) | 199 | Yes | 0.70 |
| IA-8515060 | Collins Water Supply | Story (Primary) | 483 | Yes | 0.70 |
| IA-8520061 | Colo Water Supply | Story (Primary) | 814 | Yes | 0.70 |
| IA-9123047 | Cumming Water Treatment Plant | Warren (Primary) | 326 | Yes | 0.70 |
| IA-2520098 | Dallas Center Water Supply | Dallas (Primary) | 1508 | Yes | 0.70 |
| IA-2529035 | De Soto Water Supply | Dallas (Primary) | 976 | Yes | 0.70 |
| IA-9630012 | Decorah Water Department | Winneshiek (Primary) | 7577 | Yes | 0.70 |
| IA-2715009 | Davis City Water Supply | Decatur (Primary) | 190 | Yes | 0.70 |
| IA-8538301 | Deer Creek Homeowners Association of Story County | Story (Primary) | 85 | Yes | 0.70 |
| IA-7335054 | Coin Water Supply | Page (Primary) | 179 | Yes | 0.70 |
| IA-7820080 | Council Bluffs Water Works | Pottawattamie (Primary) | 59275 | Yes | 0.70 |
| IA-9334078 | Corydon Water Supply | Wayne (Primary) | 1473 | Yes | 0.70 |
| IA-7822086 | Crescent Water Department | Pottawattamie (Primary) | 573 | Yes | 0.70 |
| IA-4515087 | Cresco Water Works | Howard (Primary) | 3617 | Yes | 0.70 |
| IA-8816089 | Creston Water Supply | Union (Primary) | 7279 | Yes | 0.70 |
| IA-2570304 | Deer Hunters Run | Shelby (Primary) | 54 | Yes | 0.70 |
| IA-2424027 | Denison Water Supply | Crawford (Primary) | 8075 | Yes | 0.70 |
| IA-7727031 | Des Moines Water Works | Polk (Primary) | 216512 | Yes | 0.70 |
| IA-2533038 | Dexter Water Supply | Dallas (Primary) | 687 | Yes | 0.70 |
| IA-8018040 | Diagonal Water Department | Ringgold (Primary) | 307 | Yes | 0.70 |
| IA-2109041 | Dickens Water Works | Clay (Primary) | 172 | Yes | 0.70 |
| IA-1636090 | Durant Water Supply | Cedar (Primary) | 1702 | Yes | 0.70 |
| IA-3126052 | Dubuque Water Works | Dubuque (Primary) | 54342 | Yes | 0.70 |
| IA-3815042 | Dike Water Supply | Grundy (Primary) | 1123 | Yes | 0.70 |
| IA-3218024 | Estherville Water Treatment Plant | Emmet (Primary) | 5974 | Yes | 0.70 |
| IA-0723027 | Evansdale Water Works | Black Hawk (Primary) | 4414 | Yes | 0.70 |
| IA-0520030 | Exira Water Department | Audubon (Primary) | 740 | Yes | 0.70 |
| IA-7730012 | Elkhart Water Supply | Polk (Primary) | 635 | Yes | 0.70 |
| IA-9049001 | Eddyville Municipal Water Department | Wapello (Primary) | 953 | Yes | 0.70 |
| IA-7428021 | Emmetsburg Municipal Water Department | Palo Alto (Primary) | 3653 | Yes | 0.70 |
| IA-8325013 | Elk Horn Municipal Water Works | Shelby (Primary) | 615 | Yes | 0.70 |
| IA-0721014 | Elk Run Heights Water Supply | Black Hawk (Primary) | 1038 | Yes | 0.70 |
| IA-4236005 | Eldora Water Supply | Hardin (Primary) | 2538 | Yes | 0.70 |
| IA-8230008 | Eldridge Water Supply | Scott (Primary) | 5251 | Yes | 0.70 |
| IA-9926096 | Eagle Grove Water Supply | Wright (Primary) | 3329 | Yes | 0.70 |
| IA-6115097 | Earlham Municipal Water Works | Madison (Primary) | 1347 | Yes | 0.70 |
| IA-4903050 | Andrew Water Supply | Jackson (Primary) | 403 | Yes | 0.70 |
| IA-7727603 | ARC Communities, LLC – Southridge Estates | Warren (Primary) | 602 | Yes | 0.70 |
| IA-7727604 | ARC Ewing Trace Mobile Home Court | Warren (Primary) | 423 | Yes | 0.70 |
| IA-1403062 | Arcadia Water Supply | Carroll (Primary) | 450 | Yes | 0.70 |
| IA-8503039 | Ames Water Treatment Plant | Story (Primary) | 46485 | Yes | 0.70 |
| IA-8403029 | Alton Municipal Water Department | Sioux (Primary) | 1158 | Yes | 0.70 |
| IA-5502015 | Algona Municipal Utilities | Kossuth (Primary) | 5166 | Yes | 0.70 |
| IA-9303024 | Allerton Water Works | Wayne (Primary) | 466 | Yes | 0.70 |
| IA-2503003 | Adel Municipal Water Works | Dallas (Primary) | 3421 | Yes | 0.70 |
| IA-1103009 | Albert City Municipal Water Supply | Buena Vista (Primary) | 661 | Yes | 0.70 |
| IA-6803010 | Albia Municipal Water Works | Monroe (Primary) | 3499 | Yes | 0.70 |
| IA-2561601 | BAR JAC Mobile Home Park | Dallas (Primary) | 251 | Yes | 0.70 |
| IA-7709601 | Autumn Ridge Estates MHP | Polk (Primary) | 959 | Yes | 0.70 |
| IA-7803080 | Avoca Water Works | Pottawattamie (Primary) | 1399 | Yes | 0.70 |
| IA-3003067 | Arnolds Park Water Department | Dickinson (Primary) | 1053 | Yes | 0.70 |
| IA-4703068 | Arthur Municipal Water Supply | Ida (Primary) | 192 | Yes | 0.70 |
| IA-1509074 | Atlantic Municipal Utilities | Cass (Primary) | 6720 | Yes | 0.70 |
| IA-0505077 | Audubon Water Supply | Audubon (Primary) | 2138 | Yes | 0.70 |
| IA-0819305 | Benefit Water District #2 | Boone (Primary) | 68 | Yes | 0.70 |
| IA-1603005 | Bennett Water Works | Cedar (Primary) | 376 | Yes | 0.70 |
| IA-3113001 | Bernard Water System | Dubuque (Primary) | 104 | Yes | 0.70 |
| IA-6203093 | Beacon Water Supply | Mahaska (Primary) | 468 | Yes | 0.70 |
| IA-3803094 | Beaman Water Supply | Grundy (Primary) | 177 | Yes | 0.70 |
| IA-4910000 | Bellevue Municipal Utilities | Jackson (Primary) | 2036 | Yes | 0.70 |
| IA-8709096 | Bedford Water Works | Taylor (Primary) | 1380 | Yes | 0.70 |
| IA-7709053 | Ankeny, City of | Polk (Primary) | 57994 | Yes | 0.70 |
| IA-5107089 | Batavia Water Works | Jefferson (Primary) | 464 | Yes | 0.70 |
| IA-6309061 | Bussey Water Supply | Marion (Primary) | 392 | Yes | 0.70 |
| IA-9113071 | Carlisle Water Supply | Warren (Primary) | 3601 | Yes | 0.70 |
| IA-3914081 | Casey Water Supply | Guthrie (Primary) | 433 | Yes | 0.70 |
| IA-8920001 | Cantril Water Supply | Van Buren (Primary) | 206 | Yes | 0.70 |
| IA-1415072 | Carroll Municipal Water Supply | Carroll (Primary) | 9410 | Yes | 0.70 |
| IA-7809078 | Carson Water Supply | Pottawattamie (Primary) | 751 | Yes | 0.70 |
| IA-7812079 | Carter Lake Water District | Pottawattamie (Primary) | 3517 | Yes | 0.70 |
| IA-5700600 | Cedar Terrace Mobile Home Court | Linn (Primary) | 548 | Yes | 0.70 |
| IA-0407008 | Centerville Municipal Water Works | Appanoose (Primary) | 5311 | Yes | 0.70 |
| IA-0709084 | Cedar Falls Municipal Water Utilities | Black Hawk (Primary) | 36479 | Yes | 0.70 |
| IA-5715093 | Cedar Rapids Water Department | Linn (Primary) | 119467 | Yes | 0.70 |
| IA-5903011 | Chariton Municipal Water Works | Lucas (Primary) | 4015 | Yes | 0.70 |
| IA-2417018 | Charter Oak Water Department | Crawford (Primary) | 466 | Yes | 0.70 |
| IA-3000099 | Central Water System | Dickinson (Primary) | 23 | Yes | 0.70 |
| IA-0510040 | Brayton Water System | Audubon (Primary) | 102 | Yes | 0.70 |
| IA-2613019 | Bloomfield Municipal Water Department | Davis (Primary) | 2546 | Yes | 0.70 |
| IA-7324038 | Braddyville Water Works | Page (Primary) | 148 | Yes | 0.70 |
| IA-8914031 | Bonaparte Water Supply | Van Buren (Primary) | 402 | Yes | 0.70 |
| IA-7717032 | Bondurant Municipal Water Supply | Polk (Primary) | 5104 | Yes | 0.70 |
| IA-0819033 | Boone Water Works | Boone (Primary) | 12018 | Yes | 0.70 |
| IA-9027014 | Blakesburg Municipal Water Works | Wapello (Primary) | 275 | Yes | 0.70 |
| IA-2909053 | Burlington Municipal Water Works | Des Moines (Primary) | 23804 | Yes | 0.70 |
| IA-4103045 | Britt Water Works | Hancock (Primary) | 1946 | Yes | 0.70 |
| IA-0848015 | Madrid Water Department | Boone (Primary) | 2363 | Yes | 0.70 |
| IA-6273901 | Mahaska Rural Water System, Inc. | Mahaska (Primary) | 6160 | Yes | 0.70 |
| IA-6545020 | Malvern Water Supply | Mills (Primary) | 1061 | Yes | 0.70 |
| IA-2839021 | Manchester Water Supply | Delaware (Primary) | 4823 | Yes | 0.70 |
| IA-2436023 | Manilla Municipal Service Department | Crawford (Primary) | 730 | Yes | 0.70 |
| IA-9845024 | Manly Water Supply | Worth (Primary) | 1239 | Yes | 0.70 |
| IA-1457025 | Manning Water Supply | Carroll (Primary) | 1403 | Yes | 0.70 |
| IA-4950029 | Maquoketa Municipal Water | Jackson (Primary) | 5706 | Yes | 0.70 |
| IA-6469042 | Marshalltown Water Works | Marshall (Primary) | 25656 | Yes | 0.70 |
| IA-9147047 | Martensdale Water Supply | Warren (Primary) | 432 | Yes | 0.70 |
| IA-1750048 | Mason City Water Department | Cerro Gordo (Primary) | 26090 | Yes | 0.70 |
| IA-5047008 | Lynnville Water Department | Jasper (Primary) | 352 | Yes | 0.70 |
| IA-6858000 | Lovilia Municipal Water Department | Monroe (Primary) | 523 | Yes | 0.70 |
| IA-9352084 | Lineville Water Supply | Wayne (Primary) | 228 | Yes | 0.70 |
| IA-6462087 | Liscomb Water Supply | Marshall (Primary) | 280 | Yes | 0.70 |
| IA-4337092 | Logan Water Plant | Harrison (Primary) | 1448 | Yes | 0.70 |
| IA-0837701 | Logansport Water District #1 | Boone (Primary) | 139 | Yes | 0.70 |
| IA-5240095 | Lone Tree Municipal Water System | Johnson (Primary) | 1208 | Yes | 0.70 |
| IA-5640019 | Keokuk Municipal Water Works | Lee (Primary) | 10016 | Yes | 0.70 |
| IA-8938026 | Keosauqua Water Works | Van Buren (Primary) | 935 | Yes | 0.70 |
| IA-9233012 | Kalona Water Department | Washington (Primary) | 2196 | Yes | 0.70 |
| IA-4150014 | Kanawha Water Supply | Hancock (Primary) | 606 | Yes | 0.70 |
| IA-8040015 | Kellerton Water Supply | Ringgold (Primary) | 293 | Yes | 0.70 |
| IA-2432034 | Kiron Water Supply | Crawford (Primary) | 259 | Yes | 0.70 |
| IA-1178800 | Lake Creek Home Owners Association | Buena Vista (Primary) | 130 | Yes | 0.70 |
| IA-6457070 | Le Grand Water Works | Marshall (Primary) | 923 | Yes | 0.70 |
| IA-6452062 | Laurel Municipal Water Works | Marshall (Primary) | 222 | Yes | 0.70 |
| IA-1453080 | Lidderdale Water Supply | Carroll (Primary) | 167 | Yes | 0.70 |
| IA-8748075 | Lenox Water Supply | Taylor (Primary) | 1307 | Yes | 0.70 |
| IA-0717353 | Lenwood Utilities, LLC | Black Hawk (Primary) | 221 | Yes | 0.70 |
| IA-2742076 | Leon Water Supply | Decatur (Primary) | 1837 | Yes | 0.70 |
| IA-1145047 | Lakeside Water Supply | Buena Vista (Primary) | 649 | Yes | 0.70 |
| IA-9545044 | Lake Mills Municipal Water Department | Winnebago (Primary) | 1965 | Yes | 0.70 |
| IA-2740050 | Lamoni Municipal Utilities | Decatur (Primary) | 2159 | Yes | 0.70 |
| IA-1051051 | Lamont Water Supply | Buchanan (Primary) | 428 | Yes | 0.70 |
| IA-7740011 | Johnston Municipal Water Supply | Polk (Primary) | 19011 | Yes | 0.70 |
| IA-3742004 | Jefferson Water Department | Greene (Primary) | 4037 | Yes | 0.70 |
| IA-8340099 | Irwin Municipal Supply | Shelby (Primary) | 317 | Yes | 0.70 |
| IA-5225079 | Iowa City Water Department | Johnson (Primary) | 58783 | Yes | 0.70 |
| IA-4260097 | Iowa Falls Water Department | Hardin (Primary) | 4904 | Yes | 0.70 |
| IA-2100701 | Iowa Lakes Regional Water | Clay (Primary) | 4933 | Yes | 0.70 |
| IA-3225701 | Iowa Lakes Regional Water – Gruver | Emmet (Primary) | 117 | Yes | 0.70 |
| IA-0990701 | Iowa Regional Utilities Association – Waverly | Bremer (Primary) | 33768 | Yes | 0.70 |
| IA-8503528 | Iowa State University | Story (Primary) | 39025 | Yes | 0.70 |
| IA-2326048 | Iowa American Water Company – Clinton District | Clinton (Primary) | 24980 | Yes | 0.70 |
| IA-8222001 | Iowa American Water Company – Davenport District | Scott (Primary) | 127481 | Yes | 0.70 |
| IA-1037070 | Independence Water Department | Buchanan (Primary) | 5548 | Yes | 0.70 |
| IA-0737062 | Hudson Water Supply | Black Hawk (Primary) | 2120 | Yes | 0.70 |
| IA-4641064 | Humboldt Municipal Water Department | Humboldt (Primary) | 4358 | Yes | 0.70 |
| IA-9348065 | Humeston Water Plant | Wayne (Primary) | 466 | Yes | 0.70 |
| IA-8538066 | Huxley Water Works Department | Story (Primary) | 3082 | Yes | 0.70 |
| IA-7128036 | Hartley Municipal Water Department | O’Brien (Primary) | 1572 | Yes | 0.70 |
| IA-8335029 | Harlan Municipal Utilities | Shelby (Primary) | 4849 | Yes | 0.70 |
| IA-5735045 | Hiawatha Water Department | Linn (Primary) | 6526 | Yes | 0.70 |
| IA-8434040 | Hawarden Water Supply | Sioux (Primary) | 2366 | Yes | 0.70 |
| IA-7709396 | Hickory Hollow Water Service, Inc. | Polk (Primary) | 218 | Yes | 0.70 |
| IA-3839052 | Holland Water Supply | Grundy (Primary) | 262 | Yes | 0.70 |
| IA-6436087 | Gilman Water Supply | Marshall (Primary) | 473 | Yes | 0.70 |
| IA-8640089 | Gladbrook Water Supply | Tama (Primary) | 878 | Yes | 0.70 |
| IA-5751040 | Glenbrook Cove Area | Linn (Primary) | 216 | Yes | 0.70 |
| IA-6525090 | Glenwood Municipal Utilities | Mills (Primary) | 5333 | Yes | 0.70 |
| IA-1438091 | Glidden Water Supply | Carroll (Primary) | 1065 | Yes | 0.70 |
| IA-3544024 | Hampton Municipal Water Works | Franklin (Primary) | 4145 | Yes | 0.70 |
| IA-0140007 | Greenfield Municipal Utilities | Adair (Primary) | 1842 | Yes | 0.70 |
| IA-1528010 | Griswold Water Supply | Cass (Primary) | 963 | Yes | 0.70 |
| IA-3833013 | Grundy Center Water Supply | Grundy (Primary) | 2514 | Yes | 0.70 |
| IA-3937016 | Guthrie Center Municipal Water Works | Guthrie (Primary) | 1461 | Yes | 0.70 |
| IA-2242018 | Guttenberg Water Utility | Clayton (Primary) | 1792 | Yes | 0.70 |
| IA-1444022 | Halbur Water Supply | Carroll (Primary) | 231 | Yes | 0.70 |
| IA-7709801 | Greenbrier Estates | Dallas (Primary) | 279 | Yes | 0.70 |
| IA-8930038 | Farmington Water Supply | Van Buren (Primary) | 617 | Yes | 0.70 |
| IA-5625062 | Fort Madison Municipal Water Works | Lee (Primary) | 10572 | Yes | 0.70 |
| IA-2122067 | Fostoria Municipal Water Supply | Clay (Primary) | 215 | Yes | 0.70 |
| IA-0135046 | Fontanelle Water Works | Adair (Primary) | 689 | Yes | 0.70 |
| IA-9525047 | Forest City Water Supply | Winnebago (Primary) | 3857 | Yes | 0.70 |
| IA-8637079 | Garwin Water Supply | Tama (Primary) | 490 | Yes | 0.70 |
| IA-4130075 | Garner Water Works | Hancock (Primary) | 2907 | Yes | 0.70 |
| IA-2725073 | Garden Grove Water Supply | Decatur (Primary) | 201 | Yes | 0.70 |
| IA-7700800 | Fox Creek Benefitted Water District | Dallas (Primary) | 488 | Yes | 0.70 |
| IA-6965091 | Stanton Water Supply | Montgomery (Primary) | 640 | Yes | 0.70 |
| IA-3070078 | Spirit Lake Waterworks | Dickinson (Primary) | 5183 | Yes | 0.70 |
| IA-6950701 | Southwest Regional Water District – Red Oak | Taylor (Primary) | 2341 | Yes | 0.70 |
| IA-2171071 | Spencer Municipal Water Utility | Clay (Primary) | 10439 | Yes | 0.70 |
| IA-5282062 | Solon Water Department | Johnson (Primary) | 1893 | Yes | 0.70 |
| IA-0180001 | Stuart Water Supply | Adair (Primary) | 1531 | Yes | 0.70 |
| IA-5076005 | Sully Municipal Water Works | Jasper (Primary) | 763 | Yes | 0.70 |
| IA-1178097 | Storm Lake Water Treatment Plant | Buena Vista (Primary) | 10095 | Yes | 0.70 |
| IA-6469601 | Sunset Village | Tama (Primary) | 319 | Yes | 0.70 |
| IA-8973095 | Stockport Water Supply | Van Buren (Primary) | 275 | Yes | 0.70 |
| IA-1689022 | Tipton Water Supply | Cedar (Primary) | 2993 | Yes | 0.70 |
| IA-0600600 | Timber Ridge | Benton (Primary) | 209 | Yes | 0.70 |
| IA-8670013 | Tama Water Supply | Tama (Primary) | 2673 | Yes | 0.70 |
| IA-1479015 | Templeton Water Supply | Carroll (Primary) | 323 | Yes | 0.70 |
| IA-3126604 | Terrace Heights | Dubuque (Primary) | 509 | Yes | 0.70 |
| IA-3080016 | Terril Municipal Water Works | Dickinson (Primary) | 347 | Yes | 0.70 |
| IA-9585017 | Thompson Water Works | Winnebago (Primary) | 480 | Yes | 0.70 |
| IA-3073001 | Superior Water System | Dickinson (Primary) | 125 | Yes | 0.70 |
| IA-7780042 | Urbandale Water Utility | Polk (Primary) | 39442 | Yes | 0.70 |
| IA-5225101 | University of Iowa Water System | Johnson (Primary) | 24794 | Yes | 0.70 |
| IA-7820701 | Urban Bluffs – North | Pottawattamie (Primary) | 1333 | Yes | 0.70 |
| IA-2452044 | Vail Water Supply | Crawford (Primary) | 405 | Yes | 0.70 |
| IA-1182035 | Truesdale Water Supply | Buena Vista (Primary) | 80 | Yes | 0.70 |
| IA-6167036 | Truro Water Works | Madison (Primary) | 451 | Yes | 0.70 |
| IA-0688053 | Vinton Municipal Water Department | Benton (Primary) | 4885 | Yes | 0.70 |
| IA-0685045 | Van Horne Water Works | Benton (Primary) | 634 | Yes | 0.70 |
| IA-2570046 | Van Meter Municipal Water Works | Dallas (Primary) | 979 | Yes | 0.70 |
| IA-1785032 | Ventura Water Works | Cerro Gordo (Primary) | 669 | Yes | 0.70 |
| IA-6985051 | Villisca Municipal Water Department | Montgomery (Primary) | 1185 | Yes | 0.70 |
| IA-0790074 | Waterloo Water Works | Black Hawk (Primary) | 65106 | Yes | 0.70 |
| IA-5879063 | Wapello Municipal Water Works | Louisa (Primary) | 1921 | Yes | 0.70 |
| IA-3290060 | Wallingford Municipal Water Works | Emmet (Primary) | 185 | Yes | 0.70 |
| IA-2178092 | Webb Water Supply | Clay (Primary) | 136 | Yes | 0.70 |
| IA-2573080 | Waukee Water Supply | Dallas (Primary) | 16674 | Yes | 0.70 |
| IA-0398082 | Waukon Water Department | Allamakee (Primary) | 3621 | Yes | 0.70 |
| IA-0990085 | Waverly Water Department | Bremer (Primary) | 9174 | Yes | 0.70 |
| IA-3090081 | West Okoboji Water Department | Dickinson (Primary) | 269 | Yes | 0.70 |
| IA-5691012 | West Point Municipal Water System | Lee (Primary) | 898 | Yes | 0.70 |
| IA-9133701 | Warren Water District | Warren (Primary) | 14880 | Yes | 0.70 |
| IA-2985002 | West Burlington Municipal Water Supply | Des Moines (Primary) | 3131 | Yes | 0.70 |
| IA-1400903 | West Central Iowa Rural Water Association – Boyer | Carroll (Primary) | 1501 | Yes | 0.70 |
| IA-2424701 | West Central Iowa Rural Water Association – Denison Subsystem | Crawford (Primary) | 1971 | Yes | 0.70 |
| IA-1400902 | West Central Iowa Rural Water Association – Nishnabotna | Carroll (Primary) | 2746 | Yes | 0.70 |
| IA-6171029 | Winterset Municipal Water Works | Madison (Primary) | 4881 | Yes | 0.70 |
| IA-4388034 | Woodbine Water Department | Harrison (Primary) | 1374 | Yes | 0.70 |
| IA-3379009 | Westgate Water Supply | Fayette (Primary) | 196 | Yes | 0.70 |
| IA-2458023 | Westside Water Supply | Crawford (Primary) | 278 | Yes | 0.70 |
| IA-4884023 | Williamsburg Public Water Supply | Iowa (Primary) | 2851 | Yes | 0.70 |
| IA-7078026 | Wilton Water Supply | Muscatine (Primary) | 2603 | Yes | 0.70 |
| IA-3890097 | Wellsburg Water Supply | Grundy (Primary) | 659 | Yes | 0.70 |
| IA-8590041 | Zearing Water Department | Story (Primary) | 561 | Yes | 0.70 |
| IA-0844006 | Xenia Rural Water District – Boone | Boone (Primary) | 3689 | Yes | 0.70 |
| IA-2573701 | Xenia Rural Water District – Des Moines | Dallas (Primary) | 8212 | Yes | 0.70 |
| IA-0848701 | Xenia Rural Water District – Madrid | Boone (Primary) | 1182 | Yes | 0.70 |
| IA-2576705 | Xenia Rural Water District – Woodward | Dallas (Primary) | 3261 | Yes | 0.70 |
| IA-9780059 | Sloan Water Supply | Woodbury (Primary) | 904 | Yes | 0.70 |
| IA-7383901 | Southwest Iowa Regional Water District – Clarinda | Page (Primary) | 1944 | Yes | 0.70 |
| IA-7774701 | Southeast Polk Rural Water District | Polk (Primary) | 5621 | Yes | 0.70 |
| IA-0207704 | Southern Iowa Rural Water Association – Corning/Brooks | Adams (Primary) | 1904 | Yes | 0.70 |
| IA-8080701 | Southern Iowa Rural Water Association – Creston | Union (Primary) | 17020 | Yes | 0.70 |
| IA-0140701 | Southern Iowa Rural Water Association – Greenfield | Adair (Primary) | 1710 | Yes | 0.70 |
| IA-2718755 | Southern Iowa Rural Water Association – Leon | Decatur (Primary) | 2126 | Yes | 0.70 |
| IA-2038701 | Southern Iowa Rural Water Association – Osceola | Clarke (Primary) | 2100 | Yes | 0.70 |
| IA-7383045 | Shenandoah Water Department | Page (Primary) | 4785 | Yes | 0.70 |
| IA-7170040 | Sheldon Water Department | O’Brien (Primary) | 4834 | Yes | 0.70 |
| IA-8369038 | Shelby Water Supply | Shelby (Primary) | 605 | Yes | 0.70 |
| IA-7380036 | Shambaugh Municipal Water Supply | Page (Primary) | 177 | Yes | 0.70 |
| IA-7245047 | Sibley Public Water Supply | Osceola (Primary) | 2609 | Yes | 0.70 |
| IA-5475050 | Sigourney Municipal Water Works | Keokuk (Primary) | 1913 | Yes | 0.70 |
| IA-6575052 | Silver City Water Supply | Mills (Primary) | 228 | Yes | 0.70 |
| IA-9778054 | Sioux City Water Department | Woodbury (Primary) | 76896 | Yes | 0.70 |
| IA-8580057 | Slater Municipal Water Department | Story (Primary) | 1384 | Yes | 0.70 |
| IA-9176019 | Saint Marys Water Corporation | Warren (Primary) | 122 | Yes | 0.70 |
| IA-8156028 | Schaller Water Supply | Sac (Primary) | 731 | Yes | 0.70 |
| IA-2446029 | Schleswig Municipal Water Supply | Crawford (Primary) | 827 | Yes | 0.70 |
| IA-3759031 | Scranton Water System | Greene (Primary) | 518 | Yes | 0.70 |
| IA-9368035 | Seymour Municipal Utility Water Department | Wayne (Primary) | 651 | Yes | 0.70 |
| IA-2166006 | Royal Municipal Water Utilities | Clay (Primary) | 419 | Yes | 0.70 |
| IA-5939009 | Russell Water Supply | Lucas (Primary) | 515 | Yes | 0.70 |
| IA-7048310 | Rolling Acres Subdivision | Scott (Primary) | 107 | Yes | 0.70 |
| IA-1037302 | River Ridge Subdivision | Buchanan (Primary) | 28 | Yes | 0.70 |
| IA-9260090 | Riverside Water Supply | Washington (Primary) | 923 | Yes | 0.70 |
| IA-8482096 | Rock Valley Water Supply | Sioux (Primary) | 3116 | Yes | 0.70 |
| IA-1170078 | Rembrant Water Supply | Buena Vista (Primary) | 189 | Yes | 0.70 |
| IA-6480081 | Rhodes Water Supply | Marshall (Primary) | 283 | Yes | 0.70 |
| IA-0400900 | Rathbun Regional Water Association, Inc. | Appanoose (Primary) | 26075 | Yes | 0.70 |
| IA-6950075 | Red Oak Water Supply | Montgomery (Primary) | 5335 | Yes | 0.70 |
| IA-2662064 | Pulaski Municipal Water Department | Davis (Primary) | 244 | Yes | 0.70 |
| IA-8300184 | Regional Water | Shelby (Primary) | 4858 | Yes | 0.70 |
| IA-0400902 | Rathbun Regional Water Association – Burlington | Des Moines (Primary) | 6592 | Yes | 0.70 |
| IA-5064055 | Prairie City Water Works | Jasper (Primary) | 1561 | Yes | 0.70 |
| IA-8365052 | Portsmouth Water Supply | Shelby (Primary) | 177 | Yes | 0.70 |
| IA-0375053 | Postville Water Department | Allamakee (Primary) | 2074 | Yes | 0.70 |
| IA-5715702 | Poweshiek Water Association – CR | Tama (Primary) | 1858 | Yes | 0.70 |
| IA-7950300 | Ponderosa Utilities, Inc. | Poweshiek (Primary) | 999 | Yes | 0.70 |
| IA-7139032 | Paullina Municipal Water Supply | O’Brien (Primary) | 995 | Yes | 0.70 |
| IA-6368033 | Pella Water Works Department | Marion (Primary) | 9619 | Yes | 0.70 |
| IA-3170001 | Peosta Municipal Water Supply | Dubuque (Primary) | 1384 | Yes | 0.70 |
| IA-2561036 | Perry Municipal Water Works | Dallas (Primary) | 7257 | Yes | 0.70 |
| IA-2038038 | Osceola Water Works | Clarke (Primary) | 4580 | Yes | 0.70 |
| IA-6273005 | Oskaloosa Municipal Water Department | Mahaska (Primary) | 11311 | Yes | 0.70 |
| IA-8474097 | Orange City Municipal Water Department | Sioux (Primary) | 5579 | Yes | 0.70 |
| IA-3090701 | Osceola County Rural Water System, Inc. – North Okoboji | Dickinson (Primary) | 1036 | Yes | 0.70 |
| IA-9083012 | Ottumwa Water Works | Wapello (Primary) | 23250 | Yes | 0.70 |
| IA-3070473 | Okoboji Camp Owners Cooperative | Dickinson (Primary) | 96 | Yes | 0.70 |
| IA-3060091 | Okoboji Water Supply | Dickinson (Primary) | 754 | Yes | 0.70 |
| IA-7709398 | Oakwood Park Water Supply | Polk (Primary) | 187 | Yes | 0.70 |
| IA-0160099 | Orient Municipal Water Supply | Adair (Primary) | 395 | Yes | 0.70 |
| IA-6663001 | Osage Municipal Water Supply | Mitchell (Primary) | 3377 | Yes | 0.70 |
| IA-9855077 | Northwood Water Works | Worth (Primary) | 1848 | Yes | 0.70 |
| IA-9164078 | Norwalk Water Supply | Warren (Primary) | 8314 | Yes | 0.70 |
| IA-0656081 | Norway City Water Supply | Benton (Primary) | 506 | Yes | 0.70 |
| IA-7853043 | Neola Light and Water | Pottawattamie (Primary) | 782 | Yes | 0.70 |
| IA-8562044 | Nevada Water Supply | Story (Primary) | 6316 | Yes | 0.70 |
| IA-8758061 | New Market Water Supply | Taylor (Primary) | 386 | Yes | 0.70 |
| IA-9159067 | New Virginia Water Supply | Warren (Primary) | 454 | Yes | 0.70 |
| IA-5059064 | Newton Water Works | Jasper (Primary) | 15110 | Yes | 0.70 |
| IA-0472012 | Moulton Water Department | Appanoose (Primary) | 562 | Yes | 0.70 |
| IA-8055014 | Mount Ayr Water Treatment Plant | Ringgold (Primary) | 1629 | Yes | 0.70 |
| IA-2032023 | Murray Water Works | Clarke (Primary) | 702 | Yes | 0.70 |
| IA-7048001 | Muscatine Power and Water | Muscatine (Primary) | 22658 | Yes | 0.70 |
| IA-0477040 | Mystic Water Supply | Appanoose (Primary) | 395 | Yes | 0.70 |
| IA-5650003 | Montrose Water Works | Lee (Primary) | 834 | Yes | 0.70 |
| IA-0467008 | Moravia Public Water Supply | Appanoose (Primary) | 618 | Yes | 0.70 |
| IA-2952075 | Middletown Water Supply | Des Moines (Primary) | 295 | Yes | 0.70 |
| IA-2948062 | Mediapolis Water Supply | Des Moines (Primary) | 1449 | Yes | 0.70 |
| IA-6471063 | Melbourne Water Supply | Marshall (Primary) | 771 | Yes | 0.70 |
| IA-3350059 | Maynard Water Supply | Fayette (Primary) | 481 | Yes | 0.70 |
| IA-8552010 | McCallsburg Water Supply | Story (Primary) | 309 | Yes | 0.70 |
| IA-9155083 | Milo Public Water Supply | Warren (Primary) | 720 | Yes | 0.70 |
| IA-8954084 | Milton Water Supply | Van Buren (Primary) | 412 | Yes | 0.70 |
| IA-2547085 | Minburn Water Works | Dallas (Primary) | 339 | Yes | 0.70 |
| IA-7849086 | Minden Water Supply | Pottawattamie (Primary) | 557 | Yes | 0.70 |
| IA-5052087 | Mingo Water Department | Jasper (Primary) | 281 | Yes | 0.70 |
| IA-4344088 | Missouri Valley Water Supply | Harrison (Primary) | 2637 | Yes | 0.70 |
| IA-7751092 | Mitchellville Water Supply | Polk (Primary) | 2094 | Yes | 0.70 |
| IA-3050079 | Milford Municipal Utilities | Dickinson (Primary) | 2795 | Yes | 0.70 |
| IA-2264095 | Monona Municipal Water Department | Clayton (Primary) | 1472 | Yes | 0.70 |
| IA-5054096 | Monroe Water Supply | Jasper (Primary) | 1700 | Yes | 0.70 |
| IA-7950097 | Montezuma Municipal Water Supply | Poweshiek (Primary) | 1428 | Yes | 0.70 |
| IA-1957064 | Lawler Water Supply | Chickasaw (Primary) | 408 | Yes | 0.68 |
| IA-7000689 | Louisa Courts Mobile Home Park and Sales | Muscatine (Primary) | 112 | Yes | 0.68 |
| IA-4945052 | La Motte Water Supply | Jackson (Primary) | 242 | Yes | 0.67 |
| IA-1108025 | Alta Municipal Water Plant | Buena Vista (Primary) | 1819 | Yes | 0.67 |
| IA-3405012 | Charles City Water Supply | Floyd (Primary) | 7156 | Yes | 0.66 |
| IA-1811001 | Cherokee Rural Water – Cherokee | Cherokee (Primary) | 2671 | Yes | 0.66 |
| IA-4715072 | Galva Water Supply | Ida (Primary) | 403 | Yes | 0.66 |
| IA-9461007 | Moorland Water Supply | Webster (Primary) | 157 | Yes | 0.66 |
| IA-7155059 | Primghar Municipal Water Supply | O’Brien (Primary) | 845 | Yes | 0.66 |
| IA-5751601 | Hometown Marion Village | Linn (Primary) | 720 | Yes | 0.65 |
| IA-5751035 | Marion Municipal Water Department | Linn (Primary) | 32525 | Yes | 0.65 |
| IA-3307065 | Arlington Water Supply | Fayette (Primary) | 399 | Yes | 0.64 |
| IA-7537032 | Kingsley Water Supply | Plymouth (Primary) | 1311 | Yes | 0.62 |
| IA-5731302 | Gaddis Estates Homeowners Association | Linn (Primary) | 200 | Yes | 0.62 |
| IA-4721054 | Holstein, City of | Ida (Primary) | 1303 | Yes | 0.61 |
| IA-8251096 | Long Grove Municipal Water Supply | Scott (Primary) | 751 | Yes | 0.61 |
| IA-3430091 | Rockford Water Supply | Floyd (Primary) | 802 | Yes | 0.61 |
| IA-7165025 | Sanborn Water Supply | O’Brien (Primary) | 1323 | Yes | 0.60 |
| IA-1271058 | New Hartford Water Supply | Butler (Primary) | 479 | Yes | 0.60 |
| IA-5765101 | Palo Water Supply | Linn (Primary) | 961 | Yes | 0.60 |
| IA-2394017 | Wheatland City Water Supply | Clinton (Primary) | 710 | Yes | 0.60 |
| IA-9260301 | Waldschmidt Subdivision | Washington (Primary) | 42 | Yes | 0.60 |
| IA-7177007 | Sutherland Water Supply | O’Brien (Primary) | 607 | Yes | 0.60 |
| IA-6264063 | Mahaska Rural Water (New Sharon) | Mahaska (Primary) | 1225 | Yes | 0.60 |
| IA-4840042 | Ladora Water Supply | Iowa (Primary) | 263 | Yes | 0.60 |
| IA-3342041 | Fayette Water Supply | Fayette (Primary) | 1243 | Yes | 0.60 |
| IA-6028081 | George Water Supply | Lyon (Primary) | 1011 | Yes | 0.60 |
| IA-1203026 | Allison Water Supply | Butler (Primary) | 956 | Yes | 0.60 |
| IA-3102001 | Asbury Municipal Water System | Dubuque (Primary) | 4223 | Yes | 0.60 |
| IA-3100899 | Corporation of New Mellery | Dubuque (Primary) | 100 | Yes | 0.60 |
| IA-0717084 | Dunkerton Municipal Water Supply | Black Hawk (Primary) | 792 | Yes | 0.60 |
| IA-9970037 | Woolstock Water Supply | Wright (Primary) | 156 | No | 0.59 |
| IA-5502319 | Woodlyn Hills | Kossuth (Primary) | 68 | No | 0.59 |
| IA-4558001 | Riceville Water Supply | Mitchell | 0 | No | 0.58 |
| IA-4558001 | Riceville Water Supply | Howard (Primary) | 737 | No | 0.58 |
| IA-0915030 | Denver Water Supply | Bremer (Primary) | 1654 | No | 0.58 |
| IA-8409037 | Boyden Municipal Water Supply | Sioux (Primary) | 664 | No | 0.57 |
| IA-8455056 | Matlock Water Supply | Sioux (Primary) | 81 | No | 0.57 |
| IA-6000744 | Lyon-Sioux Rural Water System – Boyden | Sioux (Primary) | 488 | No | 0.57 |
| IA-8200855 | Park View Water and Sanitary District | Scott (Primary) | 2220 | No | 0.57 |
| IA-2825099 | Earlville Municipal Water Supply | Delaware (Primary) | 754 | No | 0.56 |
| IA-4622095 | Dakota City Water Supply | Humboldt (Primary) | 797 | No | 0.55 |
| IA-0709600 | Cedar Falls Mobile Home Village | Black Hawk (Primary) | 409 | No | 0.55 |
| IA-3126310 | Wild Flower Ridge Subdivision | Dubuque (Primary) | 46 | No | 0.55 |
| IA-5500820 | Western Hills | Kossuth (Primary) | 56 | No | 0.54 |
| IA-3126316 | Star Water | Dubuque (Primary) | 39 | No | 0.54 |
| IA-5547094 | Lone Rock Water Supply | Kossuth (Primary) | 136 | No | 0.54 |
| IA-8531083 | Gilbert Water Supply | Story (Primary) | 1005 | No | 0.53 |
| IA-1503053 | Anita Municipal Utilities | Cass (Primary) | 903 | No | 0.53 |
| IA-3980040 | Yale Water Supply | Guthrie (Primary) | 226 | No | 0.53 |
| IA-8245323 | McCarty Creek Homeowners Association #8 | Scott (Primary) | 79 | No | 0.53 |
| IA-7633049 | Pocahontas Water Department | Pocahontas (Primary) | 1662 | No | 0.53 |
| IA-1803079 | Aurelia Water Supply | Cherokee (Primary) | 963 | No | 0.52 |
| IA-3655071 | Riverton Water Works | Fremont (Primary) | 265 | No | 0.51 |
| IA-5595020 | Whittemore Municipal Water Supply | Kossuth (Primary) | 479 | No | 0.51 |
| IA-0800923 | Woodward Resource Center | Dallas (Primary) | 1273 | No | 0.50 |
| IA-3371056 | Wadena Water System | Fayette (Primary) | 243 | No | 0.50 |
| IA-4300601 | Valley View Water Association | Harrison (Primary) | 60 | No | 0.50 |
| IA-4965057 | Preston Municipal Water Supply | Jackson (Primary) | 940 | No | 0.50 |
| IA-2277020 | Saint Olaf Water Supply | Clayton (Primary) | 100 | No | 0.50 |
| IA-7639002 | Rolfe Water Supply | Pocahontas (Primary) | 554 | No | 0.50 |
| IA-3440007 | Rudd Water Works | Floyd (Primary) | 343 | No | 0.50 |
| IA-8486053 | Sioux Center Municipal Water Department | Sioux (Primary) | 6551 | No | 0.50 |
| IA-8150015 | Sac City Municipal Water Plant | Sac (Primary) | 2093 | No | 0.50 |
| IA-1155049 | Newell Water Treatment Plant | Buena Vista (Primary) | 828 | No | 0.50 |
| IA-9408087 | Barnum Water Supply | Webster (Primary) | 179 | No | 0.50 |
| IA-3907092 | Bayard Water Supply | Guthrie (Primary) | 438 | No | 0.50 |
| IA-9620082 | Castalia Water Works | Winneshiek (Primary) | 161 | No | 0.50 |
| IA-0690301 | Clover Ridge Subdivision | Benton (Primary) | 401 | No | 0.50 |
| IA-9820010 | Fertile Municipal Water | Worth (Primary) | 344 | No | 0.50 |
| IA-7528051 | Hinton Water Supply | Plymouth (Primary) | 862 | No | 0.50 |
| IA-9830001 | Hanlontown Water Supply System | Worth (Primary) | 212 | No | 0.50 |
| IA-4647090 | Livermore Water Supply | Humboldt (Primary) | 357 | No | 0.50 |
| IA-8557058 | Maxwell Water Department | Story (Primary) | 855 | No | 0.50 |
| IA-8486701 | Lewis and Clark Regional Water System | Sioux (Primary) | 23 | No | 0.50 |
| IA-5540049 | Lakota Water Supply | Kossuth (Primary) | 237 | No | 0.49 |
| IA-1389001 | Lohrville Water Supply | Calhoun (Primary) | 342 | No | 0.49 |
| IA-5208600 | Western Hills Mobile Estates | Johnson (Primary) | 706 | No | 0.49 |
| IA-0690303 | Terry Water Association | Benton (Primary) | 43 | No | 0.48 |
| IA-8209301 | Trout Valley 2nd Addition | Scott (Primary) | 79 | No | 0.48 |
| IA-4535081 | Lime Springs Water Supply | Howard (Primary) | 469 | No | 0.48 |
| IA-5784313 | Glenn Oaks Addition | Linn (Primary) | 82 | No | 0.48 |
| IA-9738057 | Hornick Water Supply | Woodbury (Primary) | 209 | No | 0.47 |
| IA-3070301 | West Okoboji Harbor Association | Dickinson (Primary) | 339 | No | 0.47 |
| IA-3649072 | Randolph Water Works | Fremont (Primary) | 156 | No | 0.47 |
| IA-7628047 | Plover Water Supply | Pocahontas (Primary) | 72 | No | 0.47 |
| IA-1449053 | Lanesboro Water Works | Carroll (Primary) | 107 | No | 0.46 |
| IA-5543069 | Ledyard Water Supply | Kossuth (Primary) | 121 | No | 0.45 |
| IA-1147085 | Linn Grove Water Works | Buena Vista (Primary) | 152 | No | 0.45 |
| IA-4109077 | Corwith Water Supply | Hancock (Primary) | 287 | No | 0.45 |
| IA-8227045 | Donahue Municipal Water System | Scott (Primary) | 321 | No | 0.45 |
| IA-7514049 | Brunsville Municipal Water Supply | Plymouth (Primary) | 140 | No | 0.45 |
| IA-7109065 | Calumet Water Supply | O’Brien (Primary) | 166 | No | 0.45 |
| IA-0105002 | Adair Municipal Water Supply | Adair (Primary) | 726 | No | 0.45 |
| IA-1759048 | Plymouth Water Supply | Cerro Gordo (Primary) | 361 | No | 0.45 |
| IA-9766041 | Pierson Water Supply | Woodbury (Primary) | 349 | No | 0.45 |
| IA-7177701 | Osceola County Rural Water System, Inc. – South | O’Brien (Primary) | 1749 | No | 0.45 |
| IA-8209398 | Trout Valley Homeowners Association #1 | Scott (Primary) | 39 | No | 0.44 |
| IA-8271302 | Stoney Creek North Homeowners Association | Scott (Primary) | 46 | No | 0.44 |
| IA-4170033 | Woden Water Supply | Hancock (Primary) | 213 | No | 0.44 |
| IA-7841014 | Macedonia Water Supply | Pottawattamie (Primary) | 229 | No | 0.44 |
| IA-7609039 | Havelock Water Supply | Pocahontas (Primary) | 128 | No | 0.44 |
| IA-8166061 | Wall Lake Water Supply | Sac (Primary) | 791 | No | 0.43 |
| IA-1300101 | Twin Lakes Utilities | Calhoun (Primary) | 230 | No | 0.43 |
| IA-1970051 | New Hampton Water Supply | Chickasaw (Primary) | 3318 | No | 0.43 |
| IA-1363051 | Pomeroy Water Supply | Calhoun (Primary) | 622 | No | 0.43 |
| IA-7038301 | Riverview Subdivision | Scott (Primary) | 34 | No | 0.43 |
| IA-9575068 | Rake Water Supply | Winnebago (Primary) | 209 | No | 0.42 |
| IA-5772054 | Prairieburg Municipal Water Supply | Linn (Primary) | 165 | No | 0.42 |
| IA-8245357 | Woods and Meadows Homeowners Association | Scott (Primary) | 123 | No | 0.42 |
| IA-6529043 | Henderson Water Department | Mills (Primary) | 172 | No | 0.42 |
| IA-8230302 | Lake Huntington Estates Mobile Home Park | Scott (Primary) | 93 | No | 0.42 |
| IA-8548016 | Kelley Water Supply | Story (Primary) | 287 | No | 0.41 |
| IA-0862042 | Pilot Mound Water System | Boone (Primary) | 161 | No | 0.41 |
| IA-5200603 | Parkview Mobile Home Court | Johnson (Primary) | 279 | No | 0.40 |
| IA-6739095 | Onawa Municipal Water Plant | Monona (Primary) | 2795 | No | 0.40 |
| IA-4349094 | Mondamin Water Supply | Harrison (Primary) | 378 | No | 0.40 |
| IA-0650001 | Mount Auburn Water Supply | Benton (Primary) | 139 | No | 0.40 |
| IA-4852082 | Millersburg Water Department | Iowa (Primary) | 148 | No | 0.40 |
| IA-1471069 | Ralston Water Treatment Plant | Carroll (Primary) | 73 | No | 0.40 |
| IA-7038800 | Rancho Valley Homeowners Association | Muscatine (Primary) | 90 | No | 0.40 |
| IA-8670701 | Poweshiek Water Association – Tama | Tama (Primary) | 17422 | No | 0.40 |
| IA-9680301 | Plantation Country View Subdivision | Winneshiek (Primary) | 23 | No | 0.40 |
| IA-8482701 | Rock Valley Rural Water District | Sioux (Primary) | 1684 | No | 0.40 |
| IA-9770024 | Salix Water Supply | Woodbury (Primary) | 342 | No | 0.40 |
| IA-2200901 | Scenic Acres | Clayton (Primary) | 41 | No | 0.40 |
| IA-9630307 | Scenic View Estates | Winneshiek (Primary) | 70 | No | 0.40 |
| IA-6769018 | Whiting Water Supply | Monona (Primary) | 708 | No | 0.40 |
| IA-2285055 | Volga Water Supply | Clayton (Primary) | 193 | No | 0.40 |
| IA-5792059 | Walker Water Works | Linn (Primary) | 740 | No | 0.40 |
| IA-5784303 | Vern Acres (Oliphant Addition) | Linn (Primary) | 139 | No | 0.40 |
| IA-8271301 | Stoney Creek Subdivision | Wright (Primary) | 65 | No | 0.40 |
| IA-3671021 | Thurman Water Works | Fremont (Primary) | 213 | No | 0.40 |
| IA-3667012 | Tabor Water Supply | Fremont (Primary) | 966 | No | 0.40 |
| IA-0932001 | Janesville Water Supply | Bremer (Primary) | 864 | No | 0.40 |
| IA-1340001 | Knierim Water Supply | Calhoun (Primary) | 56 | No | 0.40 |
| IA-1535078 | Lewis Water Supply | Cass (Primary) | 405 | No | 0.40 |
| IA-7945018 | Malcom Water Supply | Poweshiek (Primary) | 267 | No | 0.40 |
| IA-3158001 | Luxemburg Water Supply | Dubuque (Primary) | 223 | No | 0.40 |
| IA-3346037 | Hawkeye Water Supply | Fayette (Primary) | 417 | No | 0.40 |
| IA-1800601 | Hilltop Village Mobile Home Park, Inc. | Cherokee (Primary) | 87 | No | 0.40 |
| IA-7048320 | Hilltop Road Association 3 | Muscatine (Primary) | 24 | No | 0.40 |
| IA-7048308 | Hilltop South Homeowners Association | Muscatine (Primary) | 51 | No | 0.40 |
| IA-8444063 | Hull Water Department | Sioux (Primary) | 2030 | No | 0.40 |
| IA-7709395 | Greenwood Acres Water Company | Polk (Primary) | 302 | No | 0.40 |
| IA-1207061 | Aplington Water Supply | Butler (Primary) | 1057 | No | 0.40 |
| IA-8104076 | Auburn Water Supply | Sac (Primary) | 299 | No | 0.40 |
| IA-7905088 | Barnes City Water Supply | Poweshiek (Primary) | 164 | No | 0.40 |
| IA-7909047 | Brooklyn Water Department | Poweshiek (Primary) | 1378 | No | 0.40 |
| IA-9709046 | Bronson Water Supply | Woodbury (Primary) | 299 | No | 0.40 |
| IA-5700601 | Carlton Mobile Home Cout | Linn (Primary) | 79 | No | 0.40 |
| IA-8609019 | Chelsea Water Supply | Tama (Primary) | 248 | No | 0.40 |
| IA-8627095 | Dysart Water Supply | Tama (Primary) | 1289 | No | 0.40 |
| IA-2223011 | Elkader Municipal Water Department | Clayton (Primary) | 1183 | No | 0.40 |
| IA-8631003 | Elberon Water Supply | Tama (Primary) | 182 | No | 0.40 |
| IA-7915017 | Deep River Water Supply | Poweshiek (Primary) | 259 | No | 0.40 |
| IA-8616052 | Clutier Water Supply | Tama (Primary) | 198 | No | 0.40 |
| IA-9506052 | Buffalo Center Municipal Water Department | Winnebago (Primary) | 843 | No | 0.39 |
| IA-7048392 | Hilltop Subdivision 1 | Muscatine (Primary) | 42 | No | 0.39 |
| IA-7048303 | Steamboat Association | Muscatine (Primary) | 27 | No | 0.39 |
| IA-2864013 | Ryan Water Supply | Delaware (Primary) | 335 | No | 0.39 |
| IA-9958004 | Rowan Municipal Water Supply | Wright (Primary) | 149 | No | 0.39 |
| IA-4953078 | Miles Water Department | Jackson (Primary) | 413 | No | 0.38 |
| IA-5784321 | Yankee Grove Homeowners Association | Linn (Primary) | 59 | No | 0.38 |
| IA-1393001 | Yetter Municipal Water Supply | Calhoun (Primary) | 32 | No | 0.38 |
| IA-4213013 | Alden Water Supply | Hardin (Primary) | 731 | No | 0.38 |
| IA-8315018 | Defiance Water Department | Shelby (Primary) | 264 | No | 0.38 |
| IA-8209600 | Dodds Valley View Water Association | Scott (Primary) | 204 | No | 0.37 |
| IA-6500600 | Country Estates Mobile Home Park | Mills (Primary) | 33 | No | 0.37 |
| IA-5710001 | Bertram Water Supply | Linn (Primary) | 70 | No | 0.37 |
| IA-8230301 | Willow Stream Estates Mobile Home Park | Scott (Primary) | 102 | No | 0.37 |
| IA-8209359 | Vista Hills Water Association | Scott (Primary) | 36 | No | 0.37 |
| IA-7000617 | Mecha Ceba Water System Association | Muscatine (Primary) | 81 | No | 0.37 |
| IA-8215399 | Rustic Oaks Homeowners Association | Scott (Primary) | 93 | No | 0.37 |
| IA-0965073 | Readlyn Water Supply | Bremer (Primary) | 751 | No | 0.36 |
| IA-4652011 | Ottosen Water Supply | Humboldt (Primary) | 51 | No | 0.36 |
| IA-8285058 | Walcott Water Works | Scott (Primary) | 1514 | No | 0.36 |
| IA-6762043 | Ute Water Supply | Monona (Primary) | 350 | No | 0.36 |
| IA-6673016 | St. Ansgar Water Supply | Mitchell (Primary) | 1031 | No | 0.36 |
| IA-2576036 | Woodward Water Supply | Dallas (Primary) | 951 | No | 0.36 |
| IA-3503014 | Alexander Water Department | Franklin (Primary) | 163 | No | 0.36 |
| IA-5731032 | Fairfax Water Supply | Linn (Primary) | 1973 | No | 0.36 |
| IA-3621023 | Hamburg Water Supply | Fremont (Primary) | 1103 | No | 0.36 |
| IA-2537001 | Granger Municipal Water Supply | Dallas (Primary) | 1156 | No | 0.36 |
| IA-5291301 | Frytown Water Coop | Johnson (Primary) | 81 | No | 0.36 |
| IA-5551006 | Lu Verne Water Supply | Kossuth (Primary) | 243 | No | 0.36 |
| IA-4333089 | Little Sioux Water Department | Harrison (Primary) | 147 | No | 0.36 |
| IA-9549073 | Leland Water Supply | Winnebago (Primary) | 269 | No | 0.36 |
| IA-3554061 | Latimer Water Supply | Franklin (Primary) | 471 | No | 0.36 |
| IA-0543031 | Kimballton Utilities | Audubon (Primary) | 299 | No | 0.35 |
| IA-6000800 | Lyon – Sioux Rural Water System-Rock Rapids | Lyon (Primary) | 962 | No | 0.35 |
| IA-7048319 | Fox Valley Acres | Muscatine (Primary) | 33 | No | 0.35 |
| IA-5225386 | Far Horizons Subdivision Homeowners Association | Johnson (Primary) | 74 | No | 0.35 |
| IA-5282308 | Hidden Acres Homeowners Association | Johnson (Primary) | 84 | No | 0.35 |
| IA-3338010 | Elgin Municipal Water Supply | Fayette (Primary) | 641 | No | 0.35 |
| IA-8320098 | Earling Water Supply | Shelby (Primary) | 406 | No | 0.35 |
| IA-2307001 | Andover Water Supply | Clinton (Primary) | 96 | No | 0.35 |
| IA-3902083 | Bagley Water Supply | Guthrie (Primary) | 282 | No | 0.35 |
| IA-5280301 | Woodland Estates Improvement Association | Johnson (Primary) | 55 | No | 0.35 |
| IA-9686077 | Spillville Water Supply | Winneshiek (Primary) | 341 | No | 0.35 |
| IA-5225321 | The Meadows Homeowners Association | Johnson (Primary) | 33 | No | 0.35 |
| IA-3383014 | West Union Water Supply | Fayette (Primary) | 2384 | No | 0.35 |
| IA-5282304 | Orchard View Estates | Johnson (Primary) | 105 | No | 0.35 |
| IA-7239086 | Ocheyedan Water Works | Osceola (Primary) | 464 | No | 0.35 |
| IA-5225302 | Oak Ridge Lake Estates | Johnson (Primary) | 82 | No | 0.35 |
| IA-6065092 | Rock Rapids Municipal Utilities | Lyon (Primary) | 2392 | No | 0.35 |
| IA-9525601 | Rocky Knoll Mobile Home Park | Winnebago (Primary) | 60 | No | 0.35 |
| IA-7778039 | Sheldahl Water Supply | Polk (Primary) | 296 | No | 0.35 |
| IA-4675012 | Rutland Water Supply | Humboldt (Primary) | 117 | No | 0.34 |
| IA-1667301 | Yankee Grove Homeowners Association Part 3 | Cedar (Primary) | 28 | No | 0.34 |
| IA-8209309 | Carriage Meadows Homeowners Association | Scott (Primary) | 74 | No | 0.34 |
| IA-1228038 | Clarksville Water Supply | Butler (Primary) | 1343 | No | 0.34 |
| IA-1400875 | Maple River Westside Waterline | Carroll (Primary) | 81 | No | 0.34 |
| IA-7048301 | Mark Twain Meadows Homeowners Association | Muscatine (Primary) | 348 | No | 0.34 |
| IA-6000733 | Lyon-Sioux Rural Water System – Doon | Lyon (Primary) | 1426 | No | 0.33 |
| IA-6040076 | Inwood Water Supply | Lyon (Primary) | 756 | No | 0.33 |
| IA-2339094 | Goose Lake Municipal Water System | Clinton (Primary) | 223 | No | 0.33 |
| IA-5784312 | Chestnut Ridge | Linn (Primary) | 46 | No | 0.33 |
| IA-5200801 | Cottage Reserve Corporation | Johnson (Primary) | 184 | No | 0.33 |
| IA-7349023 | Essex Water Supply | Page (Primary) | 741 | No | 0.33 |
| IA-6520019 | Emerson Water Department | Mills (Primary) | 430 | No | 0.33 |
| IA-6015047 | Doon Water Supply | Lyon (Primary) | 536 | No | 0.33 |
| IA-5720010 | Central City Water Supply | Linn (Primary) | 1168 | No | 0.33 |
| IA-6709017 | Blencoe Municipal Water Works | Monona (Primary) | 208 | No | 0.33 |
| IA-6003032 | Alvord Municipal Water Supply | Lyon (Primary) | 182 | No | 0.33 |
| IA-5200602 | Sunrise Village Mobile Home Park | Johnson (Primary) | 316 | No | 0.33 |
| IA-5225387 | Rapid Creek Ridge Homeowners Association | Johnson (Primary) | 65 | No | 0.33 |
| IA-5784302 | Midway Water and Lighting | Linn (Primary) | 67 | No | 0.33 |
| IA-8264059 | New Liberty Water Supply | Scott (Primary) | 127 | No | 0.32 |
| IA-5200889 | North Coralville Lake Manor | Johnson (Primary) | 59 | No | 0.32 |
| IA-9758023 | Oto Water Supply | Woodbury (Primary) | 100 | No | 0.32 |
| IA-9774033 | Sergeant Bluff Water Supply | Woodbury (Primary) | 3928 | No | 0.32 |
| IA-9783060 | Smithland Water Supply | Woodbury (Primary) | 213 | No | 0.32 |
| IA-2974001 | Sperry Water Supply | Des Moines (Primary) | 65 | No | 0.32 |
| IA-5200303 | Timber Trail Homeowners Association | Johnson (Primary) | 74 | No | 0.32 |
| IA-5200861 | Twin Valley Lakes Improbement Association | Johnson (Primary) | 93 | No | 0.32 |
| IA-5285302 | Winchester Heights Subdivision | Linn (Primary) | 62 | No | 0.32 |
| IA-4709090 | Battle Creek Water Supply | Ida (Primary) | 666 | No | 0.32 |
| IA-3500933 | Beeds Lake Homeowners Association | Franklin (Primary) | 70 | No | 0.32 |
| IA-1409041 | Breda Water Supply | Carroll (Primary) | 452 | No | 0.32 |
| IA-8114000 | Early Municipal Water Supply | Sac (Primary) | 550 | No | 0.32 |
| IA-4500901 | Country Winds Manor Inc -Residential Care | Howard (Primary) | 107 | No | 0.32 |
| IA-7000600 | Clearview Mobile Home Park | Muscatine (Primary) | 799 | No | 0.32 |
| IA-0733084 | Gilbertville Water Works | Black Hawk (Primary) | 666 | No | 0.32 |
| IA-3615040 | Farragut Water Supply | Fremont (Primary) | 451 | No | 0.32 |
| IA-5800901 | Louisa County Law Enforcement Center | Louisa (Primary) | 43 | No | 0.32 |
| IA-5225304 | Makada Homeowners Association | Johnson (Primary) | 70 | No | 0.32 |
| IA-1558055 | Massena Water Supply | Cass (Primary) | 330 | No | 0.31 |
| IA-3539080 | Geneva Water Works | Franklin (Primary) | 153 | No | 0.31 |
| IA-4135093 | Goodell Water Supply | Hancock (Primary) | 129 | No | 0.31 |
| IA-4728067 | Ida Grove Water Utility | Ida (Primary) | 2003 | No | 0.31 |
| IA-8215021 | Iowa-American Water Co (Blue Grass) | Scott (Primary) | 1349 | No | 0.31 |
| IA-1600301 | Coach Road Well Association | Cedar (Primary) | 37 | No | 0.31 |
| IA-5300600 | Fairview Terrace Mobile Home Park, LLC | Jones (Primary) | 65 | No | 0.31 |
| IA-7642047 | Varina Water Supply | Pocahontas (Primary) | 66 | No | 0.31 |
| IA-5200810 | Timberlake Estates Homeowners Association | Johnson (Primary) | 48 | No | 0.31 |
| IA-5225601 | Modern Manor, Inc. | Johnson (Primary) | 850 | No | 0.31 |
| IA-4347093 | Modale Water Supply | Harrison (Primary) | 266 | No | 0.30 |
| IA-7234069 | Melvin Water Works | Osceola (Primary) | 199 | No | 0.30 |
| IA-8222603 | Mount Joy Mobile Home Park | Scott (Primary) | 161 | No | 0.30 |
| IA-8666002 | Montour Water Supply | Tama (Primary) | 231 | No | 0.30 |
| IA-5349001 | Morley Municipal Water Supply | Jones (Primary) | 107 | No | 0.30 |
| IA-9677007 | Ossian Water Supply | Winneshiek (Primary) | 832 | No | 0.30 |
| IA-5285303 | Orchard Heights Subdivision | Linn (Primary) | 68 | No | 0.30 |
| IA-8355025 | Panama Water Works | Shelby (Primary) | 208 | No | 0.30 |
| IA-4364044 | Pisgah Water Supply | Harrison (Primary) | 233 | No | 0.30 |
| IA-5868085 | Oakville Water Supply | Louisa (Primary) | 161 | No | 0.30 |
| IA-8144087 | Odebolt Water Supply | Sac (Primary) | 945 | No | 0.30 |
| IA-7227701 | Osceola County Rural Water System, Inc. – North | Osceola (Primary) | 3851 | No | 0.30 |
| IA-1286042 | Shell Rock Municipal Water Supply | Butler (Primary) | 1204 | No | 0.30 |
| IA-9233460 | Shiloh | Washington (Primary) | 110 | No | 0.30 |
| IA-4975014 | Sabula Water Supply | Jackson (Primary) | 535 | No | 0.30 |
| IA-8225301 | Rolling Green Estates Homeowners Association, Inc. | Scott (Primary) | 47 | No | 0.30 |
| IA-5282303 | Royal Oaks Subdivision | Johnson (Primary) | 151 | No | 0.30 |
| IA-4552063 | Protivin Water Supply | Howard (Primary) | 263 | No | 0.30 |
| IA-8215396 | Revelle 1st and 2nd Subdivision | Scott (Primary) | 50 | No | 0.30 |
| IA-8215301 | Revelle 6th and 7th Subdivision/Addition | Scott (Primary) | 116 | No | 0.30 |
| IA-8215384 | Timber Valley Estates 1st & 2nd Addition | Scott (Primary) | 178 | No | 0.30 |
| IA-8215385 | Timber Valley Estates 3rd Addition | Scott (Primary) | 60 | No | 0.30 |
| IA-3170335 | Thunder Hills Home & Utility Association | Dubuque (Primary) | 279 | No | 0.30 |
| IA-5782087 | Springville Water Supply | Linn (Primary) | 1011 | No | 0.30 |
| IA-4289094 | Steamboat Rock Water Department | Hardin (Primary) | 288 | No | 0.30 |
| IA-4875050 | Victor Municipal Water Department | Iowa (Primary) | 830 | No | 0.30 |
| IA-4802301 | Waldenburg Community Water System | Iowa (Primary) | 84 | No | 0.30 |
| IA-3087057 | Wahpeton Water Supply | Dickinson (Primary) | 407 | No | 0.30 |
| IA-1093031 | Winthrop Water Supply | Buchanan (Primary) | 796 | No | 0.30 |
| IA-9425701 | Xenia Rural Water District – North | Dallas (Primary) | 5564 | No | 0.30 |
| IA-5396039 | Wyoming Water System | Jones (Primary) | 479 | No | 0.30 |
| IA-6915015 | Elliott Water Supply | Montgomery (Primary) | 325 | No | 0.30 |
| IA-5728018 | Ely Water Supply | Linn (Primary) | 1650 | No | 0.30 |
| IA-3215044 | Dolliver Municipal Water Supply | Emmet (Primary) | 63 | No | 0.30 |
| IA-4316087 | Dunlap Water Supply | Harrison (Primary) | 973 | No | 0.30 |
| IA-1427070 | Coon Rapids Municipal Utilities | Carroll (Primary) | 1222 | No | 0.30 |
| IA-3709001 | Churdan Water Supply | Greene (Primary) | 359 | No | 0.30 |
| IA-1630028 | Clarence Water Supply | Cedar (Primary) | 905 | No | 0.30 |
| IA-5784314 | Crestwood Acres | Linn (Primary) | 132 | No | 0.30 |
| IA-5280303 | Corridor Ridge Subdivision | Johnson (Primary) | 116 | No | 0.30 |
| IA-9729099 | Danbury Water Supply | Woodbury (Primary) | 324 | No | 0.30 |
| IA-1516093 | Cumberland Water Supply | Cass (Primary) | 251 | No | 0.30 |
| IA-5784316 | Blairs Ferry Manor | Linn (Primary) | 70 | No | 0.30 |
| IA-8218050 | Buffalo Water Supply | Scott (Primary) | 1180 | No | 0.30 |
| IA-5315005 | Center Junction Water Department | Jones (Primary) | 103 | No | 0.30 |
| IA-7700901 | Camp Dodge Water Supply | Polk (Primary) | 832 | No | 0.30 |
| IA-8209307 | Carriage Place Estates Homeowners Association | Scott (Primary) | 116 | No | 0.30 |
| IA-6715083 | Castana Municipal Water Supply | Monona (Primary) | 137 | No | 0.30 |
| IA-5003091 | Baxter Water Supply | Jasper (Primary) | 1046 | No | 0.30 |
| IA-5784309 | Big Creek Bluffs | Linn (Primary) | 74 | No | 0.30 |
| IA-7403081 | Ayrshire Water Works | Palo Alto (Primary) | 137 | No | 0.30 |
| IA-7209069 | Ashton Municipal Water Department | Osceola (Primary) | 449 | No | 0.30 |
| IA-8215372 | Hickory Hills First Annex Homeowners Association | Scott (Primary) | 145 | No | 0.30 |
| IA-4830036 | Homestead Water Supply | Iowa (Primary) | 138 | No | 0.30 |
| IA-6527038 | Hastings Water Supply | Mills (Primary) | 141 | No | 0.30 |
| IA-7222034 | Harris Water Supply | Osceola (Primary) | 158 | No | 0.30 |
| IA-9825097 | Grafton Water Supply | Worth (Primary) | 240 | No | 0.30 |
| IA-1253006 | Greene Municipal Water Supply | Butler (Primary) | 1064 | No | 0.30 |
| IA-2228037 | Farmersburg Water Works | Clayton (Primary) | 281 | No | 0.30 |
| IA-5715802 | Four Oaks | Linn (Primary) | 56 | No | 0.30 |
| IA-2234074 | Garnavillo Water Supply | Clayton (Primary) | 692 | No | 0.30 |
| IA-5337046 | Martelle Water Works | Jones (Primary) | 237 | No | 0.30 |
| IA-2256041 | Marquette Water Supply | Clayton (Primary) | 429 | No | 0.30 |
| IA-6727028 | Mapleton Municipal Water Plant | Monona (Primary) | 1137 | No | 0.30 |
| IA-7000601 | Maplewood Estates Mobile Home Park | Muscatine (Primary) | 228 | No | 0.30 |
| IA-1656001 | Lowden Water Supply | Cedar (Primary) | 733 | No | 0.30 |
| IA-2254061 | Luana Water Works | Clayton (Primary) | 250 | No | 0.30 |
| IA-6060006 | Little Rock Water Supply | Lyon (Primary) | 428 | No | 0.30 |
| IA-1345043 | Lake City Water Supply | Calhoun (Primary) | 1605 | No | 0.30 |
| IA-3045047 | Lake Park Country Club Drive | Dickinson (Primary) | 68 | No | 0.30 |
| IA-3045046 | Lake Park Municipal Utilities | Dickinson (Primary) | 963 | No | 0.30 |
| IA-5282302 | Lake Vista Homeowners Association | Johnson (Primary) | 125 | No | 0.30 |
| IA-0345054 | Lansing Water Supply | Allamakee (Primary) | 928 | No | 0.30 |
| IA-5280305 | Lakewoods Development | Johnson (Primary) | 33 | No | 0.30 |
| IA-5225301 | Lyn-Den Heights Homeowners Association | Johnson (Primary) | 78 | No | 0.29 |
| IA-5200601 | Iowa City Mobile Home Park, LLC | Johnson (Primary) | 260 | No | 0.29 |
| IA-5731301 | West Post Estates Addition | Linn (Primary) | 86 | No | 0.29 |
| IA-5225303 | Spring Valley Homeowners Association | Johnson (Primary) | 151 | No | 0.29 |
| IA-5225317 | Stoney Pointe Subdivision | Johnson (Primary) | 23 | No | 0.29 |
| IA-3126308 | Regency West Subdivision | Dubuque (Primary) | 43 | No | 0.29 |
| IA-8245303 | River Highlands Subdivision | Scott (Primary) | 59 | No | 0.29 |
| IA-2154039 | Peterson Municipal Water Supply | Clay (Primary) | 310 | No | 0.29 |
| IA-1681092 | Stanwood Water Supply | Cedar (Primary) | 636 | No | 0.28 |
| IA-5225316 | Turkey Creek Development | Johnson (Primary) | 60 | No | 0.28 |
| IA-5225309 | Woodland Heights Homeowners Association | Johnson (Primary) | 40 | No | 0.28 |
| IA-4880087 | High and West Amana Water Supply | Iowa (Primary) | 232 | No | 0.28 |
| IA-5282306 | Gallery Acres West Homeowners Association | Johnson (Primary) | 38 | No | 0.28 |
| IA-8209308 | Forest Manor Homeowners Association | Scott (Primary) | 194 | No | 0.28 |
| IA-5748086 | Lisbon Water Supply | Linn (Primary) | 2000 | No | 0.28 |
| IA-3420031 | Marble Rock Water Supply | Floyd (Primary) | 285 | No | 0.28 |
| IA-5200899 | Lake Crest Manor Homeowners Association #1 | Linn (Primary) | 26 | No | 0.28 |
| IA-9233899 | Country View Subdivision Homeowners Association | Washington (Primary) | 51 | No | 0.28 |
| IA-4115092 | Crystal Lake Water Supply | Hancock (Primary) | 232 | No | 0.28 |
| IA-8218301 | Devils Creek Estates Homeowners Association | Scott (Primary) | 135 | No | 0.28 |
| IA-2115029 | Everly Water Supply | Clay (Primary) | 563 | No | 0.27 |
| IA-9700630 | East Side Acres | Woodbury (Primary) | 46 | No | 0.27 |
| IA-7009071 | Atalissa Municipal Water Supply | Muscatine (Primary) | 289 | No | 0.27 |
| IA-8509069 | Cambridge Water Supply | Story (Primary) | 768 | No | 0.27 |
| IA-2324016 | Charlotte Water Works | Clinton (Primary) | 366 | No | 0.27 |
| IA-5200891 | Lake Crest Manor Homeowners Association #3 | Johnson (Primary) | 279 | No | 0.27 |
| IA-8215305 | Valley Heights 1st Annex Water Association | Scott (Primary) | 72 | No | 0.27 |
| IA-4848901 | The Amanas (Middle, East, Main, Golf Club) | Iowa (Primary) | 1014 | No | 0.27 |
| IA-5225308 | Northwood Estates | Johnson (Primary) | 48 | No | 0.27 |
| IA-5200318 | River Heights Property Owners Association | Johnson (Primary) | 362 | No | 0.27 |
| IA-4669080 | Renwick Municipal Water Supply | Humboldt (Primary) | 225 | No | 0.27 |
| IA-5225313 | Redwing Estates Homeowners Association | Johnson (Primary) | 37 | No | 0.26 |
| IA-3275087 | Ringsted Water Supply | Emmet (Primary) | 392 | No | 0.26 |
| IA-5225326 | Prairie View Estates Association – Johnson County | Johnson (Primary) | 144 | No | 0.26 |
| IA-8400733 | Southern Sioux County Rural Water | Sioux (Primary) | 4220 | No | 0.26 |
| IA-9281006 | West Chester Municipal Water Supply | Washington (Primary) | 136 | No | 0.26 |
| IA-5748300 | Windy Ridge Well Association | Linn (Primary) | 42 | No | 0.26 |
| IA-5200304 | Lakeview Knolls Homeowners Association | Johnson (Primary) | 113 | No | 0.26 |
| IA-8458057 | Maurice Municipal Water Supply | Sioux (Primary) | 256 | No | 0.26 |
| IA-1150030 | Marathon Light and Water Department | Buena Vista (Primary) | 226 | No | 0.26 |
| IA-9937092 | Goldfield Water Supply | Wright (Primary) | 590 | No | 0.26 |
| IA-5280302 | Indian Hills Homeowners Association | Johnson (Primary) | 48 | No | 0.26 |
| IA-8447098 | Ireton Water Supply | Sioux (Primary) | 571 | No | 0.26 |
| IA-5715301 | Brittany Estates Homeowners Association | Linn (Primary) | 67 | No | 0.26 |
| IA-3203066 | Armstrong Water Supply | Emmet (Primary) | 876 | No | 0.26 |
| IA-8215308 | Eagle Lane Corporation | Scott (Primary) | 49 | No | 0.26 |
| IA-7521084 | Craig Water Works | Plymouth (Primary) | 88 | No | 0.26 |
| IA-5809063 | Columbus City Public Water Supply | Louisa (Primary) | 363 | No | 0.26 |
| IA-5815064 | Columbus Junction Water Supply | Louisa (Primary) | 1765 | No | 0.26 |
| IA-5200825 | Coralville Lake Manor | Johnson (Primary) | 158 | No | 0.25 |
| IA-5200817 | Coralville Lake Terrace | Johnson (Primary) | 316 | No | 0.25 |
| IA-5225305 | Cherry Hills Subdivision | Johnson (Primary) | 44 | No | 0.25 |
| IA-3317047 | Clermont Water Supply | Fayette (Primary) | 587 | No | 0.25 |
| IA-3122301 | Country Hills Water Corporation | Dubuque (Primary) | 35 | No | 0.25 |
| IA-7048306 | Fairway Oaks | Scott (Primary) | 91 | No | 0.25 |
| IA-8215325 | Deer Valley Homeowners Association | Scott (Primary) | 43 | No | 0.25 |
| IA-3170302 | Burds Green Acres Subdivision | Dubuque (Primary) | 358 | No | 0.25 |
| IA-1044006 | Jesup Municipal Water Supply | Buchanan (Primary) | 2348 | No | 0.25 |
| IA-8439058 | Hospers Municipal Water Department | Sioux (Primary) | 656 | No | 0.25 |
| IA-7607088 | Gilmore City Water Works | Pocahontas (Primary) | 468 | No | 0.25 |
| IA-7445096 | Graettinger Municipal Water Supply | Palo Alto (Primary) | 815 | No | 0.25 |
| IA-8429002 | Granville Water Supply | Sioux (Primary) | 295 | No | 0.25 |
| IA-5225307 | Forestgate Subdivision | Johnson (Primary) | 130 | No | 0.25 |
| IA-7603045 | Fonda Water Supply | Pocahontas (Primary) | 619 | No | 0.25 |
| IA-8218302 | Leaf Lake Homeowners Association | Scott (Primary) | 31 | No | 0.25 |
| IA-1570032 | Wiota Water Works | Cass (Primary) | 108 | No | 0.25 |
| IA-9276096 | Wellman Municipal Water Works | Washington (Primary) | 1308 | No | 0.25 |
| IA-5225306 | Wendram Bluff Homes Water System | Johnson (Primary) | 63 | No | 0.25 |
| IA-5225325 | Westcott Heights Homeowners Association Part 1 & 2 | Johnson (Primary) | 59 | No | 0.25 |
| IA-5282301 | Twin View Heights | Johnson (Primary) | 144 | No | 0.25 |
| IA-8215304 | Village Oaks Homeowners Association | Scott (Primary) | 232 | No | 0.25 |
| IA-5584009 | Swea City Water Supply | Kossuth (Primary) | 516 | No | 0.25 |
| IA-8215306 | Timber Lake Estates Homeowners Association | Scott (Primary) | 77 | No | 0.25 |
| IA-2279003 | Strawberry Point Water Supply | Clayton (Primary) | 1188 | No | 0.25 |
| IA-3661048 | Sidney Water Supply | Fremont (Primary) | 1099 | No | 0.25 |
| IA-8400722 | Rural Water System #1 | Sioux (Primary) | 2950 | No | 0.25 |
| IA-9753022 | Moville Water Supply | Woodbury (Primary) | 1508 | No | 0.25 |
| IA-5200813 | North Twin View Heights | Johnson (Primary) | 167 | No | 0.24 |
| IA-8273062 | Pineo Grove Water Company | Scott (Primary) | 49 | No | 0.24 |
| IA-2800901 | Penn Center, Inc. | Delaware (Primary) | 83 | No | 0.24 |
| IA-9630303 | Shermans Water and Road | Winneshiek (Primary) | 68 | No | 0.24 |
| IA-9260302 | Timberline Estates Homeowners Association | Washington (Primary) | 88 | No | 0.24 |
| IA-9835001 | Joice Water Supply | Worth (Primary) | 206 | No | 0.24 |
| IA-5252301 | Cumberland Ridge First Addition | Johnson (Primary) | 51 | No | 0.24 |
| IA-7329501 | Clarinda Mental Health | Page (Primary) | 1337 | No | 0.24 |
| IA-5784307 | Country Manor Estates | Linn (Primary) | 212 | No | 0.23 |
| IA-5784318 | D & M Addition | Linn (Primary) | 74 | No | 0.23 |
| IA-1433016 | Dedham Water Supply | Carroll (Primary) | 247 | No | 0.23 |
| IA-4009016 | Ellsworth Public water Supply | Hamilton (Primary) | 493 | No | 0.23 |
| IA-3146055 | Holy Cross Water Supply | Dubuque (Primary) | 348 | No | 0.23 |
| IA-8215373 | Hickory Hills Second Annex | Scott (Primary) | 121 | No | 0.23 |
| IA-9743065 | Lawton Water Supply | Woodbury (Primary) | 898 | No | 0.23 |
| IA-5260017 | Oxford Water Supply | Johnson (Primary) | 750 | No | 0.23 |
| IA-0370047 | New Albin Water Supply | Allamakee (Primary) | 485 | No | 0.23 |
| IA-6731006 | Moorhead Water Supply | Monona (Primary) | 210 | No | 0.22 |
| IA-5282305 | Lake Macbride Heights Homeowners Association | Johnson (Primary) | 59 | No | 0.22 |
| IA-9840018 | Kensett Water Supply | Worth (Primary) | 247 | No | 0.22 |
| IA-5225673 | Iowa City Regency Mobile Home Community | Johnson (Primary) | 650 | No | 0.22 |
| IA-2900603 | Green Acres Mobile Home Park | Des Moines (Primary) | 190 | No | 0.22 |
| IA-2341099 | Grand Mound Water Supply | Clinton (Primary) | 597 | No | 0.21 |
| IA-0819303 | Coal Valley Water District | Boone (Primary) | 167 | No | 0.21 |
| IA-0858090 | Ogden Municipal Utilities | Boone (Primary) | 2297 | No | 0.21 |
| IA-5355094 | Olin Water Supply | Jones (Primary) | 649 | No | 0.20 |
| IA-3203301 | Oak Shores | Emmet (Primary) | 46 | No | 0.20 |
| IA-0960045 | Plainfield Water Supply | Bremer (Primary) | 405 | No | 0.20 |
| IA-1967041 | Nashua Water Supply | Chickasaw (Primary) | 1545 | No | 0.20 |
| IA-1667076 | Mechanicsville Water Department | Cedar (Primary) | 1065 | No | 0.20 |
| IA-0900647 | Meadow Lane Mobile Home Park | Bremer (Primary) | 107 | No | 0.20 |
| IA-8255060 | Maysville Municipal Water Department | Scott (Primary) | 164 | No | 0.20 |
| IA-5343098 | Monticello Water Supply | Jones (Primary) | 3527 | No | 0.20 |
| IA-1175056 | Sioux Rapids Water Department | Buena Vista (Primary) | 722 | No | 0.20 |
| IA-6749061 | Soldier Water Supply | Monona (Primary) | 162 | No | 0.20 |
| IA-7700802 | Southwest Polk Water Service, Inc. | Polk (Primary) | 282 | No | 0.20 |
| IA-7465010 | Ruthven Water Supply | Palo Alto (Primary) | 724 | No | 0.20 |
| IA-3126345 | Shagbark Estates | Dubuque (Primary) | 35 | No | 0.20 |
| IA-7622024 | Palmer Water Supply | Pocahontas (Primary) | 153 | No | 0.20 |
| IA-4910301 | River Point Ridge Homeowners Association INC | Jackson (Primary) | 51 | No | 0.20 |
| IA-5200347 | Riverview Estates | Johnson (Primary) | 100 | No | 0.20 |
| IA-2564074 | Redfield Water Works | Dallas (Primary) | 776 | No | 0.20 |
| IA-7866031 | Treynor Water Department | Pottawattamie (Primary) | 866 | No | 0.20 |
| IA-6400628 | Timber Wolf Valley Park | Marshall (Primary) | 356 | No | 0.20 |
| IA-3100600 | Table Mound Park | Dubuque (Primary) | 557 | No | 0.20 |
| IA-7063096 | Stockton Municipal Water Supply | Muscatine (Primary) | 183 | No | 0.20 |
| IA-3126603 | Super 20 Mobile Home Park | Dubuque (Primary) | 219 | No | 0.20 |
| IA-4300600 | Sunnyside Village Mobile Home Park | Harrison (Primary) | 170 | No | 0.20 |
| IA-3100606 | Spring Valley Park | Dubuque (Primary) | 125 | No | 0.20 |
| IA-4291038 | Union Water Supply | Hardin (Primary) | 369 | No | 0.20 |
| IA-7048332 | Valley View Estates #1 & #2 | Muscatine (Primary) | 83 | No | 0.20 |
| IA-2258601 | Walters Mobile Home Park | Clayton (Primary) | 23 | No | 0.20 |
| IA-2570301 | Wildwood Water Corporation | Dallas (Primary) | 172 | No | 0.20 |
| IA-2203039 | Clayton Water Supply | Clayton (Primary) | 40 | No | 0.20 |
| IA-2525010 | Dawson Water Works | Dallas (Primary) | 122 | No | 0.20 |
| IA-9630316 | Deerfield Heights Association | Winneshiek (Primary) | 29 | No | 0.20 |
| IA-1222044 | Bristow Municipal Water Supply | Butler (Primary) | 149 | No | 0.20 |
| IA-2258603 | Breezy Pointe Subdivision | Clayton (Primary) | 77 | No | 0.20 |
| IA-4260602 | Chase Mobile Home Park | Hardin (Primary) | 93 | No | 0.20 |
| IA-0800601 | Ames Mobile Home Park | Boone (Primary) | 149 | No | 0.20 |
| IA-7509008 | Akron, City of | Plymouth (Primary) | 1369 | No | 0.20 |
| IA-1903027 | Alta Vista Water Department | Chickasaw (Primary) | 247 | No | 0.20 |
| IA-3100629 | Ace Mobile Home Park | Dubuque (Primary) | 56 | No | 0.20 |
| IA-6403011 | Albion Water Department | Marshall (Primary) | 469 | No | 0.20 |
| IA-5704012 | Alburnett Water Supply | Linn (Primary) | 625 | No | 0.20 |
| IA-5343301 | Bacon Addition | Jones (Primary) | 75 | No | 0.20 |
| IA-0610099 | Belle Plaine Water Department | Benton (Primary) | 2378 | No | 0.20 |
| IA-5842000 | Grandview Municipal Water Department | Louisa (Primary) | 528 | No | 0.20 |
| IA-3126307 | Green Brier Subdivision | Dubuque (Primary) | 44 | No | 0.20 |
| IA-9630001 | Freeport Water District | Winneshiek (Primary) | 720 | No | 0.20 |
| IA-3414044 | Floyd Municipal Water Supply | Floyd (Primary) | 311 | No | 0.20 |
| IA-3100823 | Gavin Estates | Dubuque (Primary) | 48 | No | 0.20 |
| IA-6338000 | Harvey Water Works | Marion (Primary) | 218 | No | 0.20 |
| IA-5038017 | Kellogg Water Supply | Jasper (Primary) | 557 | No | 0.20 |
| IA-8127048 | Lake View Water Supply | Sac (Primary) | 1066 | No | 0.20 |
| IA-7540174 | Le Mars Water Department | Plymouth (Primary) | 9150 | No | 0.20 |
| IA-4341017 | Magnolia Water Supply | Harrison (Primary) | 170 | No | 0.20 |
| IA-0690305 | Maple Street Well | Marion (Primary) | 28 | No | 0.20 |
| IA-1677601 | Little Bear Campground | Cedar (Primary) | 42 | No | 0.20 |
| IA-3126306 | Lore Oaks Homeowners Association | Dubuque (Primary) | 52 | No | 0.20 |
| IA-3100608 | Lost Canyon Mobile Home Park | Dubuque (Primary) | 90 | No | 0.20 |
| IA-2346047 | Lost Nation Water Supply | Clinton (Primary) | 420 | No | 0.20 |
| IA-2348002 | Low Moor Water Works | Clinton (Primary) | 268 | No | 0.19 |
| IA-2330301 | Brookhill Estates Homeowners Association | Clinton (Primary) | 38 | No | 0.19 |
| IA-3544301 | Dorell Drive Homeowners Association | Franklin (Primary) | 30 | No | 0.19 |
| IA-3126303 | Quality Water, Inc. #2 (K-L) | Dubuque (Primary) | 65 | No | 0.19 |
| IA-2300638 | Royal Pines Village | Clinton (Primary) | 279 | No | 0.19 |
| IA-5358096 | Onslow Water Supply | Jones (Primary) | 183 | No | 0.19 |
| IA-3971026 | Panora Water Works | Guthrie (Primary) | 1105 | No | 0.18 |
| IA-5361020 | Oxford Junction Water Supply | Jones (Primary) | 461 | No | 0.18 |
| IA-6500823 | Pony Creek Homeowners Association #1 | Mills (Primary) | 116 | No | 0.18 |
| IA-2300607 | Winding Brook Mobile Home Park | Clinton (Primary) | 139 | No | 0.18 |
| IA-2900626 | Timberline Estates, Ltd. | Des Moines (Primary) | 662 | No | 0.18 |
| IA-2421025 | Deloit Municipal Water Supply | Crawford (Primary) | 253 | No | 0.18 |
| IA-3949000 | Jamaica Water Supply | Guthrie (Primary) | 208 | No | 0.18 |
| IA-4800634 | Iowa Valley Mobile Estates | Iowa (Primary) | 43 | No | 0.18 |
| IA-3100605 | Granada Mobile Home Park | Dubuque (Primary) | 59 | No | 0.18 |
| IA-8200601 | Country Estates Mobile Home Park | Scott (Primary) | 139 | No | 0.17 |
| IA-2330303 | Cardinal Valley Estates, 3rd Addition | Clinton (Primary) | 23 | No | 0.17 |
| IA-5784326 | Twin Knolls 4th & 5th Addition | Linn (Primary) | 134 | No | 0.17 |
| IA-5225327 | Westcott Heights Homeowners Association Part 3 | Johnson (Primary) | 111 | No | 0.16 |
| IA-4843033 | Marengo Water Supply | Iowa (Primary) | 2349 | No | 0.16 |
| IA-3100602 | Knapp Mobile Home Court No. 4 | Dubuque (Primary) | 81 | No | 0.15 |
| IA-2800622 | The Park at Sunset Beach | Delaware (Primary) | 37 | No | 0.15 |
| IA-8273061 | Princeton Water Supply | Scott (Primary) | 823 | No | 0.15 |
| IA-4868034 | South Amana Water Supply | Iowa (Primary) | 148 | No | 0.15 |
| IA-5225315 | Lake Ridge, Inc. | Johnson (Primary) | 836 | No | 0.14 |
| IA-8225043 | Iowa-American Water-Dixon | Scott (Primary) | 230 | No | 0.13 |
| IA-5751301 | Meadow Knolls Association | Linn (Primary) | 63 | No | 0.13 |
| IA-5300688 | Montiview Mobile Home Park | Jones (Primary) | 56 | No | 0.12 |
| IA-5784311 | Oak Valley | Linn (Primary) | 143 | No | 0.12 |
| IA-7561021 | Oyens Water Supply | Plymouth (Primary) | 96 | No | 0.11 |
| IA-5879601 | Woodland Wapello Mobilie Home Park | Louisa (Primary) | 117 | No | 0.11 |
| IA-9644001 | Frankville Rural Water System | Winneshiek (Primary) | 125 | No | 0.11 |
| IA-7614063 | Laurens Water Supply | Pocahontas (Primary) | 1187 | No | 0.11 |
| IA-7000686 | Kammerer Mobile Home Park | Muscatine (Primary) | 93 | No | 0.10 |
| IA-7450019 | Mallard Water Supply | Palo Alto (Primary) | 259 | No | 0.10 |
| IA-5515042 | Fenton Municipal Water Supply | Kossuth (Primary) | 261 | No | 0.10 |
| IA-3126304 | Hickory Acres Homeowners Association | Dubuque (Primary) | 129 | No | 0.10 |
| IA-8215302 | Hickory Hills Homeowners Association | Scott (Primary) | 70 | No | 0.10 |
| IA-8215303 | Hickory Hills Homeowners Association 2 | Scott (Primary) | 168 | No | 0.10 |
| IA-2322066 | Camanche Water Supply | Clinton (Primary) | 4226 | No | 0.10 |
| IA-3100675 | Broadview Trailer Court | Dubuque (Primary) | 76 | No | 0.10 |
| IA-3170301 | Briarwood Estates | Dubuque (Primary) | 56 | No | 0.10 |
| IA-5722053 | Coggon Water Department | Linn (Primary) | 611 | No | 0.10 |
| IA-5765303 | Deer Ridge Homeowners Water Association | Linn (Primary) | 87 | No | 0.10 |
| IA-2427049 | Dow City Water Works | Crawford (Primary) | 474 | No | 0.10 |
| IA-2817020 | Delhi Water Supply | Delaware (Primary) | 427 | No | 0.10 |
| IA-3133033 | Epworth Water Supply | Dubuque (Primary) | 1728 | No | 0.10 |
| IA-5491093 | Webster Municipal Water Works | Keokuk (Primary) | 86 | No | 0.10 |
| IA-1037301 | Pints Water Association | Buchanan (Primary) | 81 | No | 0.10 |
| IA-4863029 | Parnell Water Supply | Iowa (Primary) | 179 | No | 0.10 |
| IA-3100609 | North End Mobile Home Park | Dubuque (Primary) | 72 | No | 0.10 |
| IA-2258012 | McGregor Water Department | Clayton (Primary) | 814 | No | 0.10 |
| IA-4955001 | Monmouth Water Supply | Jackson (Primary) | 142 | No | 0.10 |
| IA-5009056 | Colfax Water Supply | Jasper (Primary) | 1945 | No | 0.09 |
| IA-2813019 | Delaware Municipal Water Supply | Delaware (Primary) | 148 | No | 0.08 |
| IA-3100601 | Lore Mound Mobile Home Park | Dubuque (Primary) | 63 | No | 0.05 |
| IA-4868701 | Poweshiek Water Association – IAC | Iowa (Primary) | 697 | No | 0.05 |
| IA-7470099 | West Bend Water Department | Palo Alto (Primary) | 729 | No | 0.05 |
| IA-0990990 | Saints Avenue Apartments | Bremer (Primary) | 116 | No | 0.04 |
| IA-4907084 | Baldwin Water Supply | Jackson (Primary) | 101 | No | 0.04 |
| IA-1855066 | Quimby Water Supply | Cherokee (Primary) | 303 | No | 0.02 |
| IA-0603072 | Atkins Municipal Water Works | Benton (Primary) | 1552 | No | 0.00 |
| IA-5221001 | Hills Water Supply | Johnson (Primary) | 653 | No | 0.00 |
| IA-3060001 | Iowa Lakes Regional Water – Okoboji Subsytem | Dickinson (Primary) | 3946 | Yes | |
| IA-5059704 | Iowa Regional Utilities Association – Newton | Jasper (Primary) | 22532 | Yes | |
| IA-6342711 | Marion County Rural Water District | Marion (Primary) | 4672 | Yes | |
| IA-2915000 | Danville Water Supply | Des Moines (Primary) | 886 | Yes | |
| IA-0400901 | Rathbun Regional Water Association – Fort Madison | Lee (Primary) | 8188 | Yes | |
| IA-4453901 | Rathbun Regional Water Association – Mount Pleasant | Henry (Primary) | 1199 | Yes | |
| IA-7770050 | Polk City Water Supply | Polk (Primary) | 3176 | Yes | |
| IA-2570302 | River Oaks Development | Dallas (Primary) | 186 | Yes | |
| IA-7785007 | West Des Moines Water Works | Polk (Primary) | 59039 | Yes | |
| IA-9000742 | Wapello Rural Water Association | Wapello (Primary) | 16414 | Yes | |
| IA-8503704 | Xenia Rural Water District – Ames | Story (Primary) | 1324 | Yes |
Export | 
Print