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Water Quality
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Water Quality Reports
A full report of water quality data, so you can get a better understanding of your drinking water.
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Water Quality Data
Find detailed information about the water that comes from your tap before and after it's treated.
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Troubleshoot Water at Your Tap
If you notice a change in the water at your tap, view information about the most common causes of issues our customers have related to their water quality.
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Other Water Quality Topics
Learn about relevant water quality topics.
Contact Us
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Contra Costa Water District
1331 Concord Avenue
Concord, CA 94520
925-688-8000
Email Us
Water Quality Hotline
925-688-8156
CCWD drinking water is safe from coronavirus (COVID-19) and available 24/7
We have dedicated employees working 24/7 to deliver safe and reliable water to the families and businesses that we serve.
Water Quality
Your tap water remains safe and unaffected during this outbreak. 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. For information about water quality, see our Annual Water Quality Report (PDF).
Idle Business Safe Return to Water Service
As some restrictions related to the COVID-19 pandemic are lifted and businesses reopen, there are actions property managers and business owners need to take when water has been off for an extended period of time. Please reference the following guidance when reopening your business.