Water Quality

The U.S. Environmental Protection Agency safeguards the water quality under the U.S. Safe Drinking Water Act of 1974. Many California standards are more stringent than federal standards. The City water supply meets all federal and state drinking water standards.


For more on water quality:


Water Service Links


Water Facts

  • Learn more about the City of Stockton water at the Delta Water Supply Project, the City's water treatment plant.


Water Resources Planning

  • The 2015 Urban Water Management Plan (UWMP) supports long-term resource planning and ensures adequate water supplies are available for current and future water demands. Every urban water supplier that provides over 3,000 acre-feet of water annually or serves more than 3,000 or more connections is required to assess the reliability of its water sources.
  • The 2020 Urban Water Management Plan draft and the Water Shortage Contingency Plan were approved by City Council during a public hearing on June 8, 2021.
  • The UWMP evaluates the availability and reliability of water supplies and current and projected water use to help ensure reliable water service under different conditions. UWMPs also evaluate conditions for the next 20 years to ensure continued long-term planning. The Urban Water Management Planning Act requires the City to prepare a UWMP every five years and submit to the California Department of Water Resources.


External Links

California Department of Water Resources

This City of Stockton web page last reviewed on --- 8/2/2022