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WaterPipes at Delta Water Treatment Plant

Stockton Water System

The Municipal Utilities Department provides water service to the residents and businesses in the North and South Stockton areas.  California Water Service (CalWater), a private company, is the provider for most of central Stockton. 

Areas served by the City of Stockton, Municipal Utilities Department are identified on the Water Service Area Maps.  The water fee estimator will calculate your estimated fees if you are in the City’s service area. 

For additional information about service providers for your address, please visit the About Your Address web page.

If you are within the City of Stockton, Municipal Utilities Department, Water Service Area and would like to start or stop water service, please contact the Utility Billing Customer Service.


Water Supplies

Approximately 25% of the City’s water supply originates from groundwater wells with the remaining water supply from treated surface water supplied by the Stockton East Water District (SEWD).  Information on SEWD, can be found under External Links below.

The Delta Water Supply Project has been completed.  The Municipal Utilities Department will reduce the amount of water received from Stockton East Water District and reduce the amount of groundwater pumped each year, improving the City’s water supply reliability and protecting its groundwater resources.  The new facility can supply up to 30 million gallons per day (MGD) of drinking water to Stockton residents.  A daily report of water pumped from the Delta and a 15-day running average is available. 


Delta Water Treatment Plant

The City recently completed construction of its new 30MGD drinking water treatment plant, and intake and pump station facility.  The Delta Water Supply Treatment Plant provides a new supplemental high-quality water supply for the Stockton Metropolitan area. 

The finished project:

  • Replaces declining surface water sources
  • Protects groundwater supplies
  • Provides for current and future water needs

We welcome and encourage public tours, but for security reasons, tours must be by appointment only.  For more information, please Contact Us.

The Delta Water Supply Project Water Treatment Plant was awarded Gold LEED*, established by the U.S. Green Building Council and verified by the Green Building Certification Institute (GBCI).  The Plant achieved Gold LEED certification for energy use, lighting, water and material use, as well as incorporating a variety of other sustainable strategies.  For more information on LEED, or to see real-time power generation activity at the Delta Water Treatment Plant, visit the External Links section below.

*LEED is a registered trademark


Water Resources Planning

Urban Water Management Plans (UWMPs) are prepared by California's urban water suppliers to support their long-term resource planning and ensure that adequate water supplies are available to meet existing and future water demands. Every urban water supplier that either 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 over a 20-year planning horizon considering normal, dry, and multiple dry years. The Urban Water Management Planning Act requires the City of Stockton to prepare this plan every 5 years and submit to the Department of Water Resources.  


Recycled Water

The 2010 Joint Water Recycling Facilities Planning Study is an effort between the City of Stockton and the City of Lodi to consider the feasibility of using Lodi’s treated wastewater as a recycled water source for the North Stockton area.  The use of non-potable water would extend the City’s water resources, address groundwater overdraft, and re-use water that would otherwise be disposed. 


Water Conservation

Water conservation is important to protect our future.  The City’s comprehensive Water Conservation Program includes long-term planning; incentives; water-saving tips; residential, business and landscape conservation; school programs; and programs designed for resident and business customers.


Rates and Fees

Currently, the Municipal Utilities Department's residential and business customers pay a monthly water rate based on both a fixed charge (determined by meter size) and a consumption charge (determined by how much water is used each month).  In 2009, the Stockton City Council approved a four-year water rate increase as defined in the 2009 Water Rate and Financing Study.


Information on the fees associated with new water service and connections can be found in the Water Fee Estimator or Permit Center.  The 2009 Surface Water Supply Fee Report provides more information on Delta Water Supply Project surface water fee. 


Water Quality

The United States Environmental Protection Agency safeguards the quality of our water supply as established in the U.S. Safe Drinking Water Act of 1974, as amended.  In many cases, California's standards are more stringent than federal standards.  Your water supply meets all federal and state drinking water standards.  For more information on water quality, view the Water Quality Report, or, the 2010 Drinking Water Public Health Goals Report.



External Links

Stockton East Water District

California Water Service Company

Northeastern San Joaquin County Groundwater Banking Authority

San Joaquin County Advisory Water Commission

U. S. Green Building Council (LEED)

Real Time Power Generation at the Delta Water Treatment Plant


This City of Stockton web page last reviewed on --- 12/5/2013