LA Canada WRP - Secondary Wastewater Treatment Plant in La Cañada Flintridge, California

LA Canada WRP is a municipal wastewater treatment facility located in La Cañada Flintridge, California, within Los Angeles County. The plant serves a population of approximately 1,700 residents and operates with a secondary treatment process, which is standard for smaller communities in the region. As a secondary treatment plant, LA Canada WRP provides biological treatment to remove organic matter and suspended solids. The facility has a designed capacity of 757.08 cubic meters per day and processes a similar volume of wastewater daily. Under the U.S. Clean Water Act, such plants must comply with National Pollutant Discharge Elimination System (NPDES) permits issued by the California State Water Resources Control Board, ensuring effluent meets water quality standards. The treated effluent from LA Canada WRP is discharged into local waterways that ultimately drain to the Los Angeles River and then to the Pacific Ocean. The plant plays a key role in protecting downstream water quality in the Los Angeles Basin, an urbanized watershed that supports diverse aquatic habitats and recreational uses.

LA Canada WRP discharges into the Los Angeles River watershed, which flows through the Los Angeles Basin before reaching the Pacific Ocean at Long Beach. The river and its tributaries provide critical habitat for native fish species such as the Santa Ana sucker and arroyo chub, as well as migratory birds. The plant's secondary treatment helps reduce nutrient and pollutant loads, supporting the ecological health of this heavily urbanized coastal watershed.