Water Quality


the water cycleOtay Water District provides a safe and reliable water supply to more than 223,000 customers in the communities of Otay Mesa, Chula Vista, Jamul, Spring Valley, Rancho San Diego, and unincorporated areas in southeastern San Diego County. To ensure water quality to your tap meets standards, Otay and the agencies it purchases its water from continually test water sources at the treatment plants and at points in the distribution system.

The water sources delivered by Otay include the Colorado River, the State Water Project, and local supplies including seawater desalination from the Carlsbad Desalination Plant. Otay purchases its treated water from the San Diego County Water Authority, Helix Water District, and Metropolitan Water District of Southern California. The U.S. Environmental Protection Agency (USEPA) and the State Water Resources Control Board (SWRCB) require that agencies providing water to the public perform source water assessments on their raw water supplies.

Otay vigilantly safeguards its water supplies. Using one or more state-certified laboratories, Otay routinely analyzes its supply for an entire range of elements that have the potential to degrade the quality of drinking water. The District’s water system meets or exceeds rigorous federal and state water quality standards and regulations.

Annually, Otay publishes a Consumer Confidence Report to explain where your water comes from, what it contains, and how it compares to federal and state standards.

Below is the most recent Consumer Confidence Report in English and in Spanish.

To request 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