Simi Valley WWTP - Municipal Wastewater Treatment in Simi Valley, California

Simi Valley WWTP is a municipal wastewater treatment facility located at 571 West Los Angeles Avenue in Simi Valley, California. Serving a population of approximately 125,317, the plant is a key component of the region's water infrastructure, handling wastewater from residential and commercial sources in this Ventura County city. As a facility serving over 100,000 people, Simi Valley WWTP falls under the U. S. Environmental Protection Agency's (EPA) National Pollutant Discharge Elimination System (NPDES) permitting program. Under the Clean Water Act, such plants are required to meet secondary treatment standards, with potential additional requirements for nutrient removal or advanced treatment depending on the receiving water body's sensitivity. The plant's designed capacity is 1.00 million gallons per day, indicating it is sized to handle the community's wastewater flows. The treated effluent from Simi Valley WWTP is discharged into the local watershed, which ultimately drains to the Pacific Ocean via the Santa Clara River or Calleguas Creek systems. These waterways support diverse aquatic life and are important for regional water quality. The plant's operations are critical for protecting downstream ecosystems and ensuring compliance with California's stringent water quality standards.

Simi Valley WWTP discharges into the Ventura County watershed, which drains to the Pacific Ocean through the Santa Clara River or Calleguas Creek. These water bodies support sensitive aquatic habitats and are important for regional biodiversity. The plant's effluent quality directly affects downstream ecosystems, including estuarine and coastal environments that rely on clean freshwater inflows.