Bridgeport WWTP - Secondary Treatment Plant in Bridgeport, Washington

Bridgeport WWTP is a municipal wastewater treatment facility located at 340 Jefferson Avenue in Bridgeport, Washington, a small community in Douglas County. The plant serves a population of approximately 2,405 residents, reflecting its role in managing domestic wastewater for this inland town. The plant provides secondary treatment, a standard level required under the U.S. Clean Water Act for municipal facilities. With a designed capacity of 1,135.62 m³/day and an average discharge volume of 757.08 m³/day, the plant operates below its capacity, indicating adequate headroom for current demand. As a U.S. facility, it operates under an EPA National Pollutant Discharge Elimination System (NPDES) permit, which sets effluent limits to protect water quality. The treated effluent is discharged into a local water body, likely a tributary of the Columbia River basin, given Bridgeport's location near the Columbia River. The plant's discharge supports downstream aquatic ecosystems, contributing to the overall health of the Columbia River watershed, which is vital for regional fisheries and irrigation.

Bridgeport WWTP discharges into a receiving water body within the Columbia River basin, which ultimately flows to the Pacific Ocean. The Columbia River supports diverse aquatic life, including salmon and steelhead runs, making water quality management critical. The plant's secondary treatment helps reduce organic pollutants and suspended solids, protecting downstream habitats from nutrient enrichment and oxygen depletion.