PATTERSON WWTF - Patterson, California Wastewater Treatment Plant

PATTERSON WWTF is a municipal wastewater treatment facility located in Patterson, Stanislaus County, California. Serving a population of around 11,606, the plant is part of the region's infrastructure for managing domestic wastewater in the Central Valley. The facility's location near the San Joaquin River places it within a major agricultural and ecological corridor. As a US-based plant serving a medium-sized community, PATTERSON WWTF is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting. These regulations require secondary treatment as a baseline, with additional nutrient controls if the receiving water body is sensitive. The plant's discharge is managed to meet state and federal water quality standards, protecting downstream uses including irrigation and habitat. The treated effluent from PATTERSON WWTF likely discharges into a tributary of the San Joaquin River, which flows through the Central Valley into the Sacramento-San Joaquin Delta and ultimately San Francisco Bay. This watershed supports diverse aquatic life and is critical for California's water supply. The plant's operations contribute to maintaining water quality in this ecologically and economically important system.

PATTERSON WWTF discharges into the San Joaquin River basin, which drains through the Sacramento-San Joaquin Delta into San Francisco Bay. The downstream environment includes critical habitats for fish species such as Chinook salmon and Delta smelt, as well as extensive agricultural water use. Nutrient and pollutant management at the plant helps protect these sensitive ecosystems and supports regional water quality goals.