Pleasant Grove WWTP - Roseville, California Wastewater Treatment Plant

Pleasant Grove WWTP is a municipal wastewater treatment facility located in Roseville, California, serving a population of about 120,000. The plant is situated in Placer County, within the Sacramento metropolitan area, and plays a key role in managing the region's wastewater. As a large agglomeration serving over 100,000 people, the plant is expected to provide at least secondary treatment under the US Clean Water Act. The facility operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. Treatment processes typically include biological treatment and disinfection to meet regulatory standards. The plant's treated effluent is discharged into local waterways that ultimately drain into the Sacramento River and then the Sacramento-San Joaquin Delta, a critical estuary that supports diverse aquatic life and provides water supply for California. The plant's operations help protect downstream ecosystems and maintain water quality in this important watershed.

The plant discharges into the Sacramento River basin, which flows into the Sacramento-San Joaquin Delta and eventually San Francisco Bay. This estuarine environment supports a rich diversity of fish, birds, and other wildlife, including several species of conservation concern. The plant's treatment performance is critical to maintaining water quality in this ecologically sensitive region.