Water Quality Reports

We are pleased to present the Annual Water Quality Report that shows the high quality of your drinking water. As the water providers to more than 500,000 people, you can count on us to provide a reliable product that exceeds all drinking water standards set by the state and federal governments keeping our community healthy and thriving. We wisely put your water dollars to work investing in the systems and infrastructure that deliver a reliable supply of high-quality water at the lowest cost possible.

You can be confident your tap water is of a high quality that is always there for you. Frequent testing for water quality and regular improvements in the treatment process keeps your drinking water among the best in the country. We hope you find this report useful in illustrating the high quality of your water service.

Water Quality Reports

2020 Annual Water Quality Report (PDF)

2020 Annual Water Quality Report

Water Provider Contact List

If you have questions about the tap water in your community, please call your water provider using the contact list below.

Water ProviderContact PersonContact Telephone
Contra Costa Water DistrictErin Gomez925-688-8091
City of AntiochLaura Villasana925-779-7024
City of Martinez Hiren Patel925-372-3588
City of PittsburgAna Corti925-252-6916
Diablo Water District Nacho Mendoza925-625-2112
Golden State Water Company (Bay Point)n/a800-999-4033
City of Brentwood James Wolfe925-516-6000