About Us

The Contra Costa Water District delivers safe, clean water to approximately 500,000 people in central and eastern Contra Costa County in Northern California.

Formed in 1936 to provide water for irrigation and industry, we are now one of the largest urban water districts in California and a leader in drinking-water treatment technology and source water protection.

As a public water agency, we are committed to sharing information about our public services with many and varied audiences.

Welcome sign outside the CCWD building
Bollman Water Treatment Plant

Always for you

The Unbreakable Promise of the Contra Costa Water District