Sunday at 6 p.m., Mouthful tackles the complicated issue of fluoride in our water system, with four special guests: David Little of Little Organic Farm; Scott Goyne of Henhouse Brewing; Michael Girout of Alvarado Street Bakery and Dawna Gallagher-Stroeh, director of Clean Water Sonoma Marin.

That’s this Sunday evening at a new time, 6 p.m., on Mouthful, Smart Talk About Food, Wine & Farming in the North Bay and Beyond, with host Michele Anna Jordan on KRCB FM Radio 91.