Water Quality

Toddler drinking water

Water Quality

Every year, the U.S. Environmental Protection Agency and the State Water Resources Control Board’s Division of Drinking Water set regulations that limit the amount of contaminants that may be present in drinking water provided by the Otay Water District. Once again, the District is proud to have met all state and federal water quality standards for the calendar year 2022.

The annual Consumer Confidence Report provides details on the results and other valuable information about the water it supplies. Customers can learn more about where their water comes from, what is tested, and how the results compare to state standards. It also lists the levels of common elements that may be detected in the water.

The District provides a safe and reliable water supply to more than 240,000 customers in Otay Mesa, Chula Vista, Jamul, Spring Valley, Rancho San Diego, and unincorporated areas of El Cajon and La Mesa. To ensure that the quality of your tap water meets standards, the District and the agencies it purchases water from continually test water sources at the treatment plants and points in the distribution system.

The water sources delivered by the District are from the Colorado River, the State Water Project, and local supplies, including seawater desalination from the Carlsbad Desalination Plant. The District purchases its treated water from the San Diego County Water Authority, Helix Water District, and Metropolitan Water District of Southern California.

The District vigilantly safeguards its water supply. Using one or more state-certified laboratories, it routinely analyzes it for an entire range of elements that have the potential to degrade the quality of drinking water.

The following is the most recent Consumer Confidence Report in English and Spanish:

To request that a copy of the most recent Consumer Confidence Report be mailed to you, please call (619) 670-2222 or email CustomerService@otaywater.gov.

If you have questions or concerns about the quality of your tap water, please call Otay’s Water Operations Manager at (619) 670-2230.

Helpful Links


Metropolitan Water District of Southern California

San Diego County Water Authority


California Department of Public Health

Consumer Confidence Report Cover