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The County Sanitation Districts of Los Angeles County (Sanitation Districts) are helping to conserve California's precious water supplies for future generations by supplying high-quality treated recycled water that is suitable for a variety of non-potable uses.
The Districts' 1,400 miles of main trunk sewers and 11 wastewater treatment plants convey and treat about 450 million gallons per day (mgd) of wastewater, of which approximately 165 mgd are available for reuse in the dry Southern California climate.
Water Recycling Process
You can learn more about the water treatment and recycling process by visiting the Sanitation Districts' website or viewing the brochure below:
Water Recycling Brochure.pdf (English)
Reciclaje de Agua Folleto.pdf (Spanish)
The brochure is available in both English and Spanish versions and provides an overview of water recycling along with the water recycling process.
Benefits of Recycling Water
Benefits of Recycling Water
This link covers some of the environmental, economical, and health benefits that result from water recycling. Learn more about the Sanitation Districts' commitment in the Beneficial Reuse Plan.
Safety of Recycled Water
Recycled Water: Putting the Risk into perspective
The safety of recycled water was explored in-depth in a project funded by the WateReuse Research Foundation. Results of the study are provided to agencies and individuals searching for more information about recycled water safety and risk. Click the link above for electronic or hard copies of the project materials.
Frequently Asked Question About Water Recycling
FAQ about Water Recycling
The above link provides answers to the most frequently asked questions on water recycling.
University of Arizona WaterSMART Project and website
This link provides information on soil aquifer treatment (SAT) as a way to use recycled water to preserve and protect water resources today and for our future.
Groundwater Reliability Improvement Program (GRIP)
This link provides information on a groundwater recharge program, which will be a vital component to sustaining the local drinking water supplies.
This link provides information about groundwater replenishment through the use of recycled water.
Regional Recycled Water Program
This link provides information on the joint Metropolitan Water District of Southern California and Sanitation Districts’ Regional Recycled Water Program.
Joint Outfall System
Seventeen of the Sanitation Districts that provide sewerage services in the metropolitan Los Angeles area south of the San Gabriel Mountains are signatory to a Joint Outfall Agreement that provides for operation and maintenance of a regional, interconnected system of facilities known as the Joint Outfall System (JOS).The service area of the JOS encompasses 73 cities and unincorporated territory, and includes some areas within the City of Los Angeles, Orange County and San Bernardino County.
The JOS provides wastewater collection, treatment, reuse, and disposal for residential, commercial, and industrial users, and includes the following treatment plants:
In addition, the system includes trunk sewers and pumping stations that convey sewage from smaller local sewers to the Sanitation Districts’ treatment plants.
Santa Clarita and Antelope Valleys
The Santa Clarita Valley Sanitation District service area encompasses the City of Santa Clarita and unincorporated territory and includes the Saugus and Valencia WRPs.
Sanitation Districts Nos. 14 and 20 service areas are in the Antelope Valley. Sanitation District No. 14 serves the Cities of Palmdale and Lancaster, along with unincorporated territory, and operates the Lancaster WRP. Sanitation District No. 20 serves the City of Palmdale and unincorporated territory and operates the Palmdale WRP.
List of Brochures
Other information about the Sanitation Districts is included here.