Longdale WWT - Secondary Wastewater Treatment in Longdale, Oklahoma

Longdale WWT is a municipal wastewater treatment facility located in Longdale, Oklahoma, serving a small population of 310 residents. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring that effluent meets basic environmental standards before discharge. With a designed capacity of 151.42 megaliters per year, the plant operates under the regulatory framework of the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. Plants of this scale typically have permits issued by the Oklahoma Department of Environmental Quality. The treated effluent is discharged into the local watershed, which ultimately drains into the Arkansas River basin. This waterway supports diverse aquatic life and provides water for agricultural and municipal uses downstream. The plant's inland location reduces direct marine impact, but its discharge contributes to the overall water quality of the region's river systems.

The plant discharges into the Arkansas River basin, which flows through Oklahoma and Arkansas before joining the Mississippi River and eventually the Gulf of Mexico. This watershed supports a variety of fish species and provides critical habitat for migratory birds. The secondary treatment process helps reduce organic pollutants, protecting downstream water quality for both ecological and human uses.