There are more than 4,500 publicly-owned discharging wastewater lagoon systems in the U.S. and these lagoons comprise approximately 24% of all publicly owned treatment works (POTWs). This webinar will discuss how lagoon systems are designed to treat wastewater and common compliance problems operators face. The webinar will also discuss several new tools EPA has developed for lagoon operators including the First Stop Toolbox for Lagoons, a Lagoon Troubleshooting Manual, and two documents providing compliance tips for lagoon operators.