Williamstown WWTP - Secondary Treatment Plant in Williamstown, West Virginia

Williamstown WWTP is a municipal wastewater treatment facility located in Williamstown, West Virginia, serving a population of approximately 2,950 residents. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for most municipal facilities to reduce organic pollutants and suspended solids before discharge. The plant has a designed capacity of 1,514.16 thousand cubic meters per year and currently treats an annual discharge volume of 908.50 thousand cubic meters. As a secondary treatment plant, it utilizes biological processes to break down organic matter, followed by clarification to remove solids. The facility operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged into a local water body that ultimately drains into the Ohio River, a major tributary of the Mississippi River system. The Ohio River supports diverse aquatic life and provides drinking water for millions downstream. The plant's location inland and away from coastal areas reduces direct marine impact, but its discharge contributes to the overall nutrient and pollutant load in the Ohio River basin.

The plant's discharge enters a local stream that flows into the Ohio River, which then joins the Mississippi River before reaching the Gulf of Mexico. The Ohio River watershed supports a variety of fish species and is an important migratory corridor for birds. The plant's secondary treatment helps reduce organic pollution, but nutrient removal may be limited, contributing to downstream eutrophication concerns in the Gulf of Mexico hypoxic zone.