ST CHARLES WWTP - Saint Charles, Iowa Wastewater Treatment Plant

ST CHARLES WWTP serves the community of Saint Charles, Iowa, a small town in Madison County. The plant provides secondary treatment for a population of 619, managing an average daily flow of approximately 189,270 liters with a designed capacity of 264,980 liters per day. As a secondary treatment facility, ST CHARLES WWTP meets the standard requirements under the U.S. Clean Water Act, which mandates secondary treatment for municipal wastewater plants. The plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Iowa Department of Natural Resources, ensuring compliance with effluent limits. The treated effluent from ST CHARLES WWTP is discharged into local streams that flow into the Middle River, a tributary of the Des Moines River. The Des Moines River ultimately drains into the Mississippi River, contributing to the larger Mississippi River Basin. This watershed supports diverse aquatic life and provides water for agricultural and recreational uses downstream.

ST CHARLES WWTP discharges into local streams that feed the Middle River, part of the Des Moines River watershed. The Des Moines River flows southeast to join the Mississippi River, a major North American waterway. This basin supports diverse aquatic species and is important for regional agriculture and recreation. The plant's secondary treatment helps protect water quality in this ecologically sensitive area.