Sewer System Facts & Statistics

The District maintains 224.2 miles of gravity sewer mains ranging from 8-inches to 30-inches in diameter. There are approximately 4,707 sewer manholes within the system, which are used as access points for cleaning and inspection purposes. As of 2019, the District's wastewater system contains a total of 47,471 connections to single family residences, multi-family residences, commercial properties, and industrial properties.

An important part of the District’s responsibilities is systematic cleaning and closed circuit televising (CCTV) of the collection system to identify problem areas and see firsthand the effectiveness of the cleaning program.

There are 20 sewer pumping stations located within the collection system that are necessary to convey flow from low lying areas to higher elevations where the wastewater can again flow by gravity. The pumping stations have redundant pumping equipment and advanced telemetry that continuously reports to the headquarters.  The District also has emergency standby generators and emergency standby bypass pumps as part of its emergency response equipment.

CASE STUDY - Sewer Cleaning


Where does your wastewater go?

The Costa Mesa Sanitary District (CMSD) is a proud member of the Orange County Sanitation District (OCSD).

Click HERE to learn where CMSD's wastewater goes and how it is treated at OCSD.