The Consolidated Sewer Maintenance District (CSMD) of Los Angeles County is administered by the County of Los Angeles Department of Public Works (DPW).
For the list of cities served, operational maps, or for more information about the CSMD, please visit the Los Angeles County Sewer Maintenance home page.
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Trunk Sewers vs Sanitary Sewers
The CSMD maintains sanitary, or collection sewers that most resident and commercial lateral lines drain into. They typically have a diameter of 8″ and are usually constructed of vitrified clay pipe.
Trunk sewers are much larger, constructed of reinforced concrete, and carry sewage from sanitary sewer outflows to waste water reclamation plants. GIS data representing trunk sewers should be obtained from the agencies who maintain them:
- The Las Virgenes Municipal Water District maintains trunk sewers in and near Agoura Hills and Calabasas.
- The Sanitation Districts of Los Angeles County maintain most areas within Los Angeles County outside the City of Los Angeles.
Shapefiles Included in this Download:
Sewer_Pipe – Identifies sanitary sewers (gravity sewers, siphons and force mains) maintained by the CSMD.
Sewer_Manhole – Identifies sanitary sewer maintenance holes maintained by the CSMD.
Operation_Map_Grid – Identifies areas within Operations Maps used by CSMD field crews.
Non_SMD_Pipe – Used to identify nearby private and city sanitary sewers that CSMD field crews do not maintain.
Non_SMD_Manhole – Used to identify nearby private and city sanitary sewer structures that CSMD field crews do not maintain.
Sewer_Pump_Station – Identifies sanitary sewer lift stations maintained by the Los Angeles County Sewer Maintenance Districts.
WWTP – Locations of small package waste water treatment plants maintained by the Los Angeles County Sewer Maintenance Districts.
Sample Portion of a CSMD Operations Map
