Overview
Arch Cape STP is a secondary treatment plant serving 328 residents in Clatsop County, Oregon. It discharges 257.41 megaliters of treated wastewater annually, operating under the US Clean Water Act.
Arch Cape STP is a wastewater treatment facility located in Clatsop County, Oregon, serving a small coastal community of 328 people. The plant is situated near the Pacific Ocean, reflecting its role in managing wastewater for a rural, coastal population. The plant provides secondary treatment, which is the standard required by the US Clean Water Act for municipal wastewater. With a designed capacity of 567.81 megaliters and an annual discharge volume of 257.41 megaliters, the facility operates well within its capacity. As a small plant, it is subject to EPA NPDES permitting, ensuring compliance with discharge limits. The treated effluent is discharged into the local watershed, which ultimately drains to the Pacific Ocean. The plant's coastal location means its discharge can affect nearshore marine environments, including habitats for salmon and other aquatic species. Proper treatment is essential to protect water quality and ecosystem health in this sensitive coastal area.
Environmental context
The plant discharges into the coastal watershed of Clatsop County, Oregon, which drains directly to the Pacific Ocean. The receiving waters support diverse marine life, including salmon runs and migratory birds. As a coastal facility, the plant's effluent must meet strict standards to protect nearshore habitats and recreational waters.
Frequently asked questions
Arch Cape STP is located in Clatsop County, Oregon, United States, near the coastal community of Arch Cape.
The plant serves a population of 328 residents in the Arch Cape area of Clatsop County.
The plant provides secondary treatment and discharges treated effluent into the local watershed, which ultimately flows to the Pacific Ocean.
As a US municipal wastewater plant, Arch Cape STP operates under the Clean Water Act and is subject to EPA NPDES permitting, which sets discharge limits to protect water quality.
Small plants in Oregon typically use secondary treatment, as required by the Clean Water Act, and may employ lagoons or mechanical systems to meet effluent standards.
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