Sewer System Informationmanhole and street

The Costa Mesa Sanitary District (CMSD) maintains 224 miles of gravity sewer mains ranging from 8-inches to 30-inches in diameter. There are approximately 5,650 sewer manholes within the system, which are used as access points for cleaning and inspection purposes. As of 2019, CMSD's wastewater system contains a total of 47,471 connections to single family residences, multi-family residences, commercial properties, and industrial properties. The system also includes 20 pump stations that convey wastewater flow from low lying areas to higher elevations where it can continue its gravity flow. The pump stations have redundant pumping equipment and advanced telemetry that continuously reports to CMSD staff. Emergency equipment, such as standby generators and bypass pumps, are always ready for deployment, and CMSD staff systematically cleans and closed circuit televises (CCTV) the entire collection system to identify problem areas and prevent backups and overflows. In 2016, CMSD developed a Sewer Cleaning Case Study to determine the effectiveness of privatized versus in-house sewer cleaning services. The study determined that in-house sewer cleaning services are less costly and equally as effective as private services.
Where does your wastewater end up?

CMSD's wastewater collection system collects and transports wastewater from homes and businesses to the Orange County Sanitation District (OCSD), where it is treated and recycled. To learn more about how OCSD treats and recycles wastewater, watch this video.

To learn more about CMSD's wastewater services, explore the topics below.