MANILA WWTF - Secondary Wastewater Treatment Plant in Eureka, California

MANILA WWTF is a municipal wastewater treatment facility located on Bond Drive in Manila, near Eureka, Humboldt County, California. The plant serves a small population of 785 residents, providing secondary treatment to manage local wastewater. Its location within 10 km of the Pacific Ocean places it in a coastal-sensitive zone. As a secondary treatment plant, MANILA WWTF meets the minimum standard required by the US Clean Water Act for municipal wastewater facilities. The plant has a designed capacity of 378.54 volume units and a discharge volume of 268.76, indicating operational headroom. US plants of this scale typically operate under National Pollutant Discharge Elimination System (NPDES) permits issued by the California State Water Resources Control Board, which set effluent limits to protect water quality. The treated effluent from MANILA WWTF discharges into the Pacific Ocean via the Humboldt Bay area, a productive estuary that supports diverse aquatic life, including salmon, Dungeness crab, and migratory shorebirds. The plant's coastal location necessitates stringent discharge controls to prevent nutrient loading and protect marine habitats. Proper operation is critical for maintaining the ecological health of the region's coastal waters.

MANILA WWTF discharges treated wastewater into the Pacific Ocean near Humboldt Bay, a large coastal estuary in northern California. This bay is a vital habitat for fish, birds, and marine mammals, including threatened species like the marbled murrelet. The plant's proximity to the coast requires careful management to minimize impacts on water quality and the sensitive marine ecosystem.