Pere Cliff MHP Wastewater Treatment Plant, Jefferson County, Missouri

Pere Cliff MHP is a wastewater treatment plant located in Jefferson County, Missouri, within the High Ridge Township. The facility serves a small population of 33 residents and is part of the municipal wastewater infrastructure for the area. The plant operates under the U.S. Clean Water Act, which requires NPDES permits for discharges to surface waters, ensuring compliance with federal and state water quality standards. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. It has a designed capacity of 11.36 million gallons per day and currently discharges 7.57 million gallons per day, indicating it operates below capacity. The treatment level is classified as advanced, reflecting a high degree of pollutant removal. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant's location inland, away from coastal areas, reduces direct marine impact. The surrounding watershed supports diverse aquatic life and is an important part of the regional water system. The facility's advanced treatment helps protect downstream water quality and ecological health.

The plant discharges into local streams that flow into the Meramec River, a tributary of the Mississippi River. The Mississippi River basin is a major ecological corridor supporting diverse fish and wildlife. The advanced treatment at Pere Cliff MHP helps minimize nutrient loading and protects the aquatic habitat in the downstream watershed.