STONEWALL WWT Wastewater Treatment Plant, Stonewall, Oklahoma

STONEWALL WWT is a municipal wastewater treatment facility located in Stonewall, Pontotoc County, Oklahoma. Serving a small population of 465 residents, the plant provides secondary treatment to meet state and federal water quality standards. Its location in the rural interior of Oklahoma places it within the Arkansas-White-Red River basin, a major drainage system flowing into the Mississippi River. The plant operates under the US Clean Water Act, which requires secondary treatment for municipal facilities of this scale. With a designed capacity of 295.26 units and a discharge volume of 227.13 units, the plant maintains operational capacity to handle local wastewater flows. The treatment process ensures that effluent meets regulatory limits before discharge. The treated effluent from STONEWALL WWT is discharged into local waterways that ultimately drain into the Red River and then the Mississippi River. This downstream connection highlights the plant's role in protecting water quality in a region that supports diverse aquatic life and agricultural activities. The plant's inland location reduces direct marine impact, but its discharge contributes to the overall health of the Mississippi River basin.

The plant discharges into the Arkansas-White-Red River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. This watershed supports a variety of freshwater species and is important for regional agriculture and recreation. The plant's secondary treatment helps reduce nutrient loading and protect downstream water quality in this ecologically significant basin.