Central Contra Costa Sanitary District
CCCSD Home Page

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Maintaining more than 1,500 miles of sewers.

Sewer System

Located in Walnut Creek at the junction of Highway 24 and Interstate 680, Collection System Operations’ job is to ensure that 1,500 miles of underground sewers are able to collect and transport 45 million gallons of wastewater to the treatment plant safely and efficiently every day.

Service Area Map
Find out if your home or business is in our service area.

Overflows and Frequently Asked Questions (FAQs)
Obtain emergency response by calling (925) 933-0990.

Maintenance & Repair
CCCSD has a planned schedule for cleaning and maintenance of sewer lines.

Connecting to the Sewer
Information on how to connect to the sewer system.

Construction Zone
Information regarding CCCSD’s current construction projects.

Sewer System Management Plan (SSMP)
A description of the goals of CCCSD's sewer system management plan..

Standard Specifications 2014
View the Standard Specifications for Design and Construction.

Report a Sewer Spill at (925) 933-0990. Click for more contact information. 

Overflow Protection Device. Protect your property from sewage backups. Get more information.

Construction Cone icon Construction Zone


Lafayette-Pleasant Hill Road Trunk Sewer Project  This project will reconstruct approximately 5,500 linear feet of sewer lines within the public right-of-way and easements.

Diablo Sewer Renovation Project, Phase 1 This project will replace/rehabilitate approximately 6,600 feet of 6 through 10-inch sewer pipe, and abandon over 4,000 feet of sewers at several different sites throughout Diablo and Danville.

View all neighborhood projects View all neighborhood projects 

Contractors/Bid Documents

View planholder lists and other bid documents here View planholder lists and other bid documents here