Acute Fluoride Poisoning Associated with an On-Site Fluoridator in a Vermont Elementary School

On August 30, 1980, an outbreak of minor illnesses consisting of nausea and vomiting affected 22 individuals attending a farmers market at a school. Illness was associated with the consumption of beverages made from school water, analysis of the water showed high levels of fluoride. The most likely source of the contamination was the school fluoridator, which had accidentally been left on continuous operation.

Middletown Maryland Latest City to Receive Toxic Spill of Fluoride in their Drinking Water

Officials of Middletown, MD warned residents by radio in November, 1993 not to drink or cook with city water due to high fluoride levels. Malfunctioning fluoridation equipment caused excessive fluoride levels of 70 parts per million (ppm) in the distribution system. The Maryland State Department of Health stated that they did not plan to do a health survey to determine if any residents experienced symptoms of fluoride poisoning.