San Luis Obispo County Water Resources

Division of Public Works


Paso Robles Groundwater Basin


Groundwater Basin Management Plan (Mar 2011)



Paso Robles Groundwater Basin Computer Modeling
Documents and Reports Groundwater Management Plan (AB 3030) Supply Options Study


Current News and Information

4.12.18 – Relating to Steinbeck vs. County of San Luis Obispo – Hearing on Motion to Compel Production of Confidential Well Information


  • Public Hearing to consider formation of the Paso Basin - County of San Luis Obispo Groundwater Sustainability Agency (GSA)

    Tuesday, May 16, 2017, 9:00 a.m.

    San Luis Obispo Board of Supervisors Chamber

    1055 Monterey Street

    San Luis Obispo, CA 93408



  • Paso Robles Stakeholder Forum

    Thursday, February 23, 2017

    6:00 PM - 8:00 PM

    Kermit King Elementary School

    700 Schoolhouse Circle

    Paso Robles, CA 93446



  • The model runs are now complete and we are in the final stages preparing to present draft reports for both the model and supply options efforts to the Board of Supervisors later in the year. A public meeting to present the initial draft report for the model refinement and runs is scheduled for:


    Thursday, July 21, 2016, 2-4:00 pm

    Templeton Community Center

    601 S. Main Street, Templeton




  • The Advisory Committee's term has ended after the January 21, 2016 meeting. Please read the letter to the Members and Alternates from the Chair of the Board of Supervisors, Supervisor Lynn Compton: PBAC Thank You





  • The Final Computer Model Update Report, Response to Comments and Refinement/Additional Model Runs Scope of Work have been added to the project website. Click on "Computer Modeling" in the Navigation box.




More Information

For more information on land use efforts associated with the Paso Basin that are being implemented by the County Planning Department, please visit


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Sustainable Groundwater Management Act (SGMA) News & Information


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Groundwater Conditions and Trends

Water Level Change Maps



Hydrographs by Subarea (Last updated: May 2018)




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