Washington State Park Wastewater Treatment Plant, Fertile, Missouri

The Washington State Park wastewater treatment plant is located in Fertile, Washington County, Missouri, United States. It serves a small population of 274 people, typical of a rural community facility. The plant provides secondary treatment, which is the standard for many small to medium-sized plants in the United States. The plant operates under the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. Plants of this scale are typically regulated by the Missouri Department of Natural Resources. The designed capacity is 113.56 units, with a current discharge volume of 75.71 units, indicating operational headroom. The treated effluent is discharged into a local water body, likely a stream or river within the Mississippi River basin. The area is inland, far from coastal waters, reducing direct marine impact. The plant's operation helps protect local water quality and downstream ecosystems in the Big River or Meramec River watershed, which ultimately drains to the Mississippi River and the Gulf of Mexico.

The plant discharges into a local waterway within the Mississippi River basin, likely a tributary of the Big River or Meramec River. These streams support diverse aquatic life, including fish and macroinvertebrates, and are part of a larger watershed that drains to the Mississippi River and eventually the Gulf of Mexico. The area is characterized by forested hills and agricultural land, and the plant's secondary treatment helps reduce nutrient and pathogen loads, protecting downstream water quality.