Yachats STP - Secondary Wastewater Treatment Plant in Yachats, Oregon

Yachats STP (Sewage Treatment Plant) serves the small coastal community of Yachats, Oregon, on the central coast of the United States. The plant provides secondary treatment for a population of approximately 1,194 residents, typical of a small municipal facility in a rural coastal setting. As a secondary treatment plant, Yachats STP meets the minimum standard required under the U.S. Clean Water Act for municipal wastewater treatment. The plant has a designed capacity of 1,249.18 million gallons per day and currently discharges an average of 454.25 million gallons per day, indicating it operates well below its design capacity. The facility is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The plant's treated effluent is discharged into the Pacific Ocean, given its proximity to the coast. The nearshore marine environment supports diverse aquatic life, including salmon, rockfish, and marine mammals. Proper treatment is critical to prevent nutrient loading and pathogen contamination in this ecologically sensitive coastal zone.

Yachats STP discharges into the Pacific Ocean along the Oregon coast, a region characterized by rocky shores, estuaries, and upwelling zones that support rich marine biodiversity. The nearshore waters are part of the California Current Large Marine Ecosystem, providing habitat for commercially important fish species and marine mammals. Effective wastewater treatment is essential to minimize impacts on water quality and protect the health of this coastal ecosystem.