News Details

Annual Drinking Water Quality Report Now Available

June 19, 2024

Walnut Valley Water District (WVWD) has published its annual Consumer Confidence Report (CCR) to inform the public about the quality of its drinking water for the year 2023. The report is available at

Required by the California State Water Resources Control Board Division of Drinking Water and the United States Environmental Protection Agency (EPA), the CCR is a comprehensive report detailing where WVWD’s water comes from, what it contains, and how it compares to drinking water standards as set by state and federal regulations.  The report, due July 1 of each year, shows that WVWD water exceeded all federal and state guidelines.

In 2023, WVWD completed more than 17,000 tests for over 80 regulated contaminants.

“The team of dedicated water professionals at WVWD prioritizes water quality. We perform weekly tests in addition to the testing of our wholesale agencies (Three Valleys Municipal Water District and the Metropolitan Water District of Southern California) to make sure that the quality of the water being distributed to the residents of Diamond Bar, Walnut, Industry, Pomona, Rowland Heights, and West Covina meets or is above the standards set by federal and state officials,” said WVWD Water Quality Specialist, Gabe Gaytan.  “The guidelines are very strict, so the water from your tap is more regulated than bottled water.  As always, I encourage customers to learn about the quality of their water by reviewing the annual CCRs that are published for their educational benefit.”

The CCR includes an easy-to-read Water Quality Data Chart that is divided into two standards – Primary and Secondary.  Primary standards identify contaminants in water that may be immediately harmful to humans or affect their health if consumed for long periods of time.  Secondary standards highlight water qualities that have to do with aesthetics, such as taste, mineral content, odor, color and turbidity.

In addition to the water quality data, the comprehensive report has information about WVWD’s imported water system that includes the State Water Project and the Colorado River Aqueduct.

For printed copies of the CCR please email or call (909) 595-7554.