DONIPHAN Municipal WWTF - Ripley County, Missouri Wastewater Treatment Plant

DONIPHAN Municipal WWTF is a wastewater treatment facility located in Ripley County, Missouri, serving a population of approximately 1,164 residents. The plant provides secondary treatment, which is the standard level for small communities under the U.S. Clean Water Act. With a designed capacity of 1,741.28 thousand gallons per day and an average discharge volume of 870.65 thousand gallons per day, the plant operates well within its capacity. As a municipal facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Missouri Department of Natural Resources, ensuring compliance with federal water quality standards. The treated effluent is discharged into a nearby water body that ultimately drains into the Mississippi River basin. This contributes to the overall health of the region's aquatic ecosystems, supporting diverse fish and wildlife habitats downstream.

The plant discharges into local streams that are part of the Mississippi River watershed, one of the largest river systems in North America. The receiving waters support diverse aquatic life and are important for regional biodiversity. Downstream, the Mississippi River flows into the Gulf of Mexico, where nutrient loading from wastewater can contribute to hypoxic zones. The plant's secondary treatment helps reduce organic pollutants and protect water quality in this ecologically significant basin.