Newcastle WWTF - Secondary Wastewater Treatment in Placer County, California

Newcastle WWTF is a municipal wastewater treatment facility located in Placer County, California, United States. The plant serves a small community of approximately 1,112 residents, providing secondary treatment to meet state and federal water quality standards. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 681.37 megaliters per year and an actual discharge volume of 378.54 megaliters, the facility operates well within its capacity, indicating room for future growth or seasonal fluctuations. The treated effluent from Newcastle WWTF is discharged into local waterways that ultimately drain into the Sacramento River system, which flows into the Sacramento-San Joaquin Delta and San Francisco Bay. This watershed supports diverse aquatic life and is an important ecological corridor in California's Central Valley.

The plant's discharge enters the Sacramento River watershed, which flows through the Sacramento-San Joaquin Delta and into San Francisco Bay. This estuarine environment supports a variety of fish species, including salmon and steelhead, and is a critical habitat for migratory birds. The secondary treatment provided by the plant helps reduce nutrient and organic loads, protecting downstream water quality in this ecologically sensitive region.