La Push Sewage Treatment Plant - Coastal Secondary Treatment Facility in Washington

La Push Sewage Treatment Plant is a municipal wastewater facility located in La Push, Washington, within the Quileute Indian Reservation. The plant serves a small coastal community of about 1,000 people, providing secondary treatment to manage domestic wastewater from the area. As a secondary treatment plant, it meets the minimum standards required under the US Clean Water Act for municipal wastewater treatment. The plant has a designed capacity of 492.10 volume units and discharges an average of 302.83 volume units daily, indicating operational capacity well within its design limits. Facilities of this scale in the US typically operate under National Pollutant Discharge Elimination System (NPDES) permits issued by the Washington State Department of Ecology. The plant's treated effluent is discharged into the Pacific Ocean via the Quileute Harbor Marina area. This coastal discharge is subject to stringent water quality standards to protect marine ecosystems, including salmon habitats and the broader Olympic Coast National Marine Sanctuary. The plant plays a critical role in safeguarding local water quality and public health in this remote coastal setting.

The plant discharges into the Pacific Ocean near the Quileute River estuary, which supports diverse aquatic life including salmon, steelhead, and marine mammals. The coastal waters are part of the California Current Large Marine Ecosystem, known for its high productivity. Protecting this environment requires effective treatment to prevent nutrient loading and pathogen contamination, especially given the cultural and ecological significance of the area to the Quileute Tribe.