FCPWSD 3 Pine Lake Estates Subdivision Wastewater Treatment Plant, Franklin County, Missouri

FCPWSD 3 Pine Lake Estates Subdivision is a municipal wastewater treatment plant located in Franklin County, Missouri, United States. The facility serves a small population of 60 residents within the Pine Lake Estates community, operating as part of the Franklin County Public Water Supply District 3. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater facilities. With a designed capacity of 64.35 units and an average daily discharge of 22.71 units, the plant operates well below its capacity, indicating room for future growth or seasonal variability. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant's inland location, over 50 km from the coast, reduces direct marine impact. Its operation supports the protection of local streams and groundwater in the Meramec River watershed, which is ecologically significant for aquatic biodiversity.

The plant discharges into the Meramec River watershed, which flows into the Mississippi River and eventually the Gulf of Mexico. This inland basin supports diverse aquatic life, including fish and macroinvertebrates, and is a key water resource for the region. The secondary treatment process helps reduce nutrient and organic pollutant loads, protecting downstream water quality.