The Sanitation Districts of Los Angeles County operate ten water reclamation plants (WRPs) and one ocean discharge facility (Joint Water Pollution Control Plant), which treat approximately 510 million gallons per day, 200 mgd of which are available for reuse. The capacities at these facilities range from 0.2 mgd (La Canada WRP) to 400 mgd (Joint Water Pollution Control Plant); the San Jose Creek WRP is the largest of the water reclamation plants with a capacity of 100 mgd. Click here to view a map of the Wastewater Treatment Facilities.

Joint Outfall System

Seventeen of the Sanitation Districts that provide sewerage services in the metropolitan Los Angeles area are also signatory to a Joint Outfall Agreement that provides 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.

This system provides sewage treatment, reuse, and disposal for residential, commercial, and industrial users and includes the following treatment plants:

• Joint Water Pollution Control Plant located in the City of Carson
• La Caņada WRP in the City of La Caņada Flintridge
• Long Beach WRP in the City of Long Beach
• Los Coyotes WRP in the City of Cerritos
• Pomona WRP in the City of Pomona
• San Jose Creek WRP adjacent to the City of Industry
• Whittier Narrows WRP near the City if South El Monte

In addition, the system includes trunk sewers and pumping plants which convey sewage from member cities' local sewers to the Districts' treatment plants. Sanitation Districts No. 2 acts as the agent for the other signatory Sanitation Districts in administering the Joint Outfall Agreement.

Santa Clarita and Antelope Valleys

• The Santa Clarita Valley Sanitation District operates the Saugus and Valencia WRPs.
• Sanitation Districts Nos. 14 and 20 serve the Antelope Valley and operate the Lancaster and Palmdale WRPs, respectively.
• The Antelope Valley Field Office supports operations at the Lancaster and Palmdale WRPs and assists the community with issues related to wastewater treatment.

Contract Flows and Inactive Districts

• Sanitation Districts Nos. 4, 9, and 27 are served by contracts with the City of Los Angeles.
• Sanitation Districts No. 34, located in La Cresenta and Sanitation District No. 35, located within the unincorporated area of Acton, have not yet constructed sewerage systems. These Sanitation Districts are currently inactive and sewerage service in these areas is provided by individual private disposal systems.

• Joint Outfall System WRPs: La Canada Los Coyotes Long Beach JWPCP Pomona San Jose Creek Whittier Narrows
• Santa Clarita Valley WRPs:Saugus Valencia
• Antelope Valley WRPs: Lancaster Palmdale

Click here to view the treatment process at the WRPs.

Awards

The Sanitation Districts has received numerous awards. To view recent awards please click here.

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