Water Quality Report

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, we take great effort and great pride in delivering a product that exceeds all drinking water standards set by the state and federal governments. This report includes water quality data collected throughout 2018 and answers questions you might have about your tap water.

You can be confident your tap water is of a high quality. 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.

2018 Annual Water Quality Report (PDF) 

2018 Annual Water Quality Report (Spanish) (PDF)

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Recent Water Quality Results

Questions?

Call Erin Gomez at (925) 688-8091.

2018 Annual Water Quality Report (PDF)

2018 Annual Water Quality Report