WaterPipes at Delta Water Treatment Plant

The Municipal Utilities Department (MUD) is one of the water service providers to the Stockton area, serving more than 48,000 connections to residences and businesses in North and South Stockton.



In 2012, the City completed the Delta Water Treatment Plant (DWTP) providing a supplemental, high-quality water supply for the Stockton Metro area -- up to 30 million gallons per day.


The DWTP was awarded a Gold LEED for energy use, lighting, water, and material use, and other sustainable strategies. The water treatment plant also:

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



The City treats and distributes potable water from these sources:

  • Surface water diverted from the Sacramento San Joaquin Delta
  • Surface water from the Mokelumne River purchased from Woodbridge Irrigation District
  • Local groundwater from wells owned and operated by the City
  • Treated water purchased from the Stockton East Water District (SEWD), imported from the New Melones (Stanislaus River) and New Hogan (Calaveras River) Reservoirs


Read the water treatment plant intake and sewer treatment plant discharge daily report and 15-day running average. 


External Links

California Water Service Company

Eastern San Joaquin Groundwater Authority

Eastern San Joaquin County Groundwater Basin Authority

Stockton East Water District

This City of Stockton web page last reviewed on --- 4/13/2020