• Water Division

    The California Public Utilities Commission (CPUC) is responsible for ensuring that California’s investor-owned water utilities deliver clean, safe, and reliable water to their customers at reasonable rates. Water Division regulates over a 100 investor-owned water and sewer utilities under the CPUC’s jurisdiction providing water service to about 16 percent of California’s residents. Approximately 95 percent of that total is served by 9 large water utilities each serving more than 10,000 connections. Annual water and wastewater revenues under the CPUC’s regulation total $1.4 billion.

  • The California Public Utilities Commission (CPUC) - Water Division (WD) investigates water and sewer system service quality issues, analyzes, and processes utility rate change requests. The CPUC works directly with utility management to track and certify compliance with CPUC requirements.
    WD provides advisory services of regulated utilities and water public programs, and monitors compliance with laws and CPUC directives. WD performs research, analysis, and assessments and communicates the results to the CPUC and its staff, the regulated utilities, and the public.
  • Drought and Conservation Information

    With California facing one of the most severe droughts on record, the state has called for a 25 percent reduction in overall potable urban water use statewide in accordance with Governor Brown’s April 1, 2015, Executive Order.

    Additional Information Regarding the Drought and the 25 Percent Reduction 

  • Glass of Water

    Statewide Mandatory Reduction

    More Info

  • Low Income Assistance Programs

    The Low-Income Oversight Board (LIOB) advises the Commission on low-income electric, gas, and water customer issues and serves as a liaison for the Commission to low-income ratepayers and representatives. 

  • Consumer Information

  • Water

    Available Documents

    Please use the link below to access information regarding Advice Letters.
    Glass of Water

    Annual Reports

    All public utilities doing business in California are required to file reports as specified by the Commission of the utilities' operations.
    Man answering a telephone call

    Consumer Confidence Reports

    It is required by law that all Public Water Systems prepare and distribute to its customers by July 1st of every year a Consumer Confidence Report.


  • Consumer Help Logo

    Looking for Consumer Information?

    The CPUC regulates privately owned electric, natural gas, telephone, water, and sewer utilities. Unfortunately, we cannot help you resolve issues with publicly owned or municipal utilities, such as SMUD or the Los Angeles Department of Water and Power.

    Visit the Consumer Information Website

  • Resources

  • CPUC Regulates Water

    Water Action Plan 2010

    Policy objectives for the regulation of investor-owned water utilities highlighting the actions that the California Public Utilities Commission anticipated or would consider taking in order to implement these objectives.

    Additional Information

    Lake Oroville July 2015

    Department of Water Resources

    The Department of Water Resources (DWR) is responsible for managing and protecting California’s

    Visit the California Department of Water Resources Website