ONEIDA WWTP - Secondary Treatment Plant in Oneida, Kansas

ONEIDA WWTP is a municipal wastewater treatment plant located on Lasalle Street in Oneida, Nemaha County, Kansas. Serving a small population of 70 residents, the plant provides secondary treatment, which is the standard level for small communities under the U.S. Clean Water Act. The facility has a designed capacity of 37.85 units and currently processes 26.50 units of wastewater daily. As a secondary treatment plant, ONEIDA WWTP uses biological processes to remove organic matter and suspended solids, meeting the EPA's minimum requirements for municipal wastewater treatment. The plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which regulates discharges to surface waters. Plants of this scale typically have permits that set effluent limits for BOD, TSS, and other parameters. The treated effluent from ONEIDA WWTP is discharged into a local water body that eventually drains into the Missouri River watershed. The Missouri River flows eastward to join the Mississippi River, which empties into the Gulf of Mexico. This downstream connection means the plant's discharge contributes to the overall water quality of a major river system that supports diverse aquatic life and provides drinking water for millions.

The treated effluent from ONEIDA WWTP enters a local stream that is part of the Missouri River basin. The Missouri River flows through the Great Plains and eventually joins the Mississippi River, which discharges into the Gulf of Mexico. This watershed supports a variety of fish species and provides critical habitat for migratory birds. The plant's secondary treatment helps protect downstream water quality by reducing organic pollutants and nutrients that could otherwise contribute to eutrophication in receiving waters.