Cal Water tests water at the source and in the distribution system, but does not perform tests of water in customers’ homes. However, such tests can be useful, particularly if you are concerned about health problems caused by your home plumbing or similar issues. If you have a concern about your home water, you can contact an accredited lab for information on home water testing.
You should check a lab’s accreditation status before using it. Also, not all labs are certified for all constituents of interest, so you should ask to see if they are ELAP-certified for the analysis requested before ordering a test.
A current list of accredited laboratories can be viewed on the State Water Resources Control Board’s interactive map.
Water Quality Reports
Annual Consumer Confidence Reports detailing water quality, supply sources, and compliance with health standards for each district, ensuring transparency and customer confidence in their water service.
Explore Reports
Water Treatment
Cal Water doesn’t take a “one-size-fits-all” approach to water treatment; instead, we work diligently to identify the best, most cost-effective treatment required for each water source.
Learn About Water Treatment
Water Quality Testing Labs
If you have a concern about your home water, you can contact an accredited lab for information on home water testing.
Learn More About our Labs