Green Ridge WWTP - Secondary Treatment Plant in Green Ridge, Missouri

Green Ridge WWTP is a municipal wastewater treatment facility located in Green Ridge, Pettis County, Missouri, serving a population of 476. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring that effluent meets federal and state water quality standards before discharge. With a designed capacity of 257.41 megaliters per year and an actual discharge volume of 143.85 megaliters, the plant operates below its design capacity. As a US facility, it is subject to the National Pollutant Discharge Elimination System (NPDES) permit program under the Clean Water Act, which sets effluent limits and monitoring requirements to protect receiving waters. The plant's treated effluent is discharged to a local water body, ultimately contributing to the Missouri River basin. The surrounding area is primarily rural and agricultural, and the plant plays a key role in protecting local streams and groundwater from untreated wastewater, supporting both public health and the ecological health of the region.

The plant discharges into a local watercourse that flows into the Missouri River watershed, which eventually drains to the Mississippi River and the Gulf of Mexico. The receiving waters support diverse aquatic life and are used for recreation and agriculture downstream. Proper treatment is essential to prevent nutrient pollution and protect downstream ecosystems.