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Pasadena Water & Power

  • Water Integrated Resource Plan and the Urban Water Management Plan

    Sprinkler SidewalkWith so much concern about supply shortfalls and predictions for long-term drought, PWP and its customers must carefully manage all available water.

    Two important documents, the Water Integrated Resources Plan (WIRP) and the Urban Water Management Plan (UWMP), give PWP a clear, comprehensive, long-term strategy for maximizing our supply and providing reliable water to our customers for the next two decades and beyond.

    Though the documents are similar, the WIRP is meant as a planning tool solely for Pasadena while the UWMP, required of all water utilities by the California Department of Water Resources, helps the state ensure an adequate supply for all California communities. 

    Water Integrated Resource Plan

    The Water Integrated Resources Plan (WIRP), adopted by the Pasadena City Council on January 31, 2011, is our city’s blueprint for ensuring reliable, cost-effective, and environmentally responsible water supply for the next 25 years. Developed with extensive public input, the WIRP takes into consideration local, regional and possible alternative water supplies, demand forecasts, community values, conservation potential and changing conditions, such as climate change.

    WIRP Objectives:  

    • Provide a reliable water supply
    • Maintain affordability, while addressing fairness and equity
    • Ensure safe, high-quality drinking water
    • Protect receiving waters and the environment
    • Protect cultural and recreational resources
    • Maximize efficiency of water use
    • Maintain quality of life and positive economic climate
    • Reduce risk and maximize opportunities
    • Ensure public safety
    • Reduce energy footprint for water operations 

    2011 Water Integrated Resource Plan Documents  

    View a copy of the 2011 WIRP and see the links below to the Appendices of the final approved WIRP:

    Appendix A   Appendix D   Appendix G 
    Appendix B  Appendix E  Appendix H 
    Appendix C  Appendix F  Appendix I 

    Urban Water Management Plan

    The 2011 WIRP formed the basis for PWP's Urban Water Management Plan (UWMP), adopted by the City Council on June 6, 2011. The WIRP contains information on water demand in PWP's service territory, water supply and conservation options, the preferred water resource portfolio, and an implementation strategy and schedule.

    UWMPs are prepared by California's urban water suppliers to support their long-term resource planning and ensure adequate water supplies are available to meet existing and future water demands. Every large-scale urban water supplier is required to assess the reliability of its water sources over a 20-year planning horizon. This assessment is to be included in the UWMP, which is updated and submitted to the California Department of Water Resources for review every five years.

    UWMP Objectives  

    • Reduce baseline daily per capita water use of 210 gallons per capita per day (gpcd) by 10% by 2015 to 189 gallons gpcd. PWP plans to achieve the required reduction through additional water conservation and by using recycled water.
    • Supplement supplies and reduce PWP's reliance on imported water through the implementation of the first phase of a Recycled Water Project.
    • Implement additional water conservation practices in addition to current conservation efforts.
    • Advance the planning of other major projects that will increase PWP's water supply reliability, such as the Devil’s Gate Surface Diversion and Groundwater Storage Project.

     2010 Urban Water Management Plan Documents 


    For more information on water planning, call PWP at (626) 744-4409.
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