5 p.m. gates open, 6 p.m. forum begins, on the Spring Garden Park grounds, 5489 North U.S. Highway 17, DeLeon Springs. (Enter on Spring Garden Ranch Road.) What is being done to reduce spring pollution from other contributors such as agriculture? Learn about grants for homeowners who must convert to nitrogen-reducing septic systems. Hear from local DOH-approved septic-system contractors about installation options. Enjoy delicious deli sandwiches and smoothies from The Mason Shakes and Café Food Truck. Bring your lawn chairs, bug spray, etc., for this outdoor rain-or-shine event. Questionnaires will be available for the public to fill out and return by 5:45 p.m. Free.