Raw wastewater throughout the District’s boundaries is collected and transported through a network of piping and lift stations to the American Gulch Water Reclamation Facility located west of the Payson Golf Course. Flow enters the treatment plant into the headworks for preliminary treatment. The wastewater is screened to remove large objects and debris. Flows are measured in a Parshall flume. Next, grit and other inorganic material are removed prior to entering the biological treatment units. Wastewater flows to the volatile fatty acid (VFA) basin where conditions favor the production of volatile fatty acids, which help to achieve increased phosphorus removal in the biological treatment units.