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Water Quality

Our area watersheds and groundwater wells provide raw water supplies to the City. As water flows over the land or through the groundwater aquifer, naturally occurring minerals can dissolve in it and, in some cases, contaminant materials can also be picked up from animal or human activities.

In order to ensure that tap water is safe to drink, the U.S. Environmental Protection Agency (USEPA) and the State Water Resources Control Board (State Water Board) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems.

Water Quality

Water Service

Water Facts

To learn more about the City water at the Delta Water Supply Project, the City's water treatment plant, email WaterFacts@stocktonca.gov or call (866) 786-5987.

Participation requires completion of Tour Request Form and Release of Liability Form.


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

Last Update : 05/29/2024, 10:32:28 AM