Raymond STP Wastewater Treatment Plant, Pacific County, Washington

Raymond STP is a municipal wastewater treatment plant located in Pacific County, Washington, United States. The facility serves a population of approximately 3,664 residents, making it a small-scale treatment plant typical of rural communities in the Pacific Northwest. As a plant in the United States, Raymond STP operates under the Clean Water Act, which requires municipal wastewater treatment plants to meet National Pollutant Discharge Elimination System (NPDES) permit standards. For small communities like Raymond, secondary treatment is typically required to reduce organic pollutants and suspended solids before discharge. The plant's treated effluent is discharged into local waterways that ultimately drain to the Pacific Ocean via the Willapa Bay or Columbia River estuary system. This coastal watershed supports diverse aquatic life, including salmon runs and shellfish habitats, making proper treatment essential for protecting downstream ecosystems.

Raymond STP discharges into the Willapa Bay watershed, a coastal estuary in southwestern Washington that drains to the Pacific Ocean. The bay supports critical habitats for Dungeness crab, Pacific salmon, and migratory shorebirds. Proper wastewater treatment is vital to maintain water quality in this productive marine ecosystem.