San Luis Obispo County Water Resources

Public Works Department


Sustainable Groundwater Management Act (SGMA)


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A New State Law: The “Sustainable Groundwater Management Act” (SGMA) took effect on January 1, 2015. SGMA provides for the preparation and implementation of Groundwater Sustainability Plans (GSP) for High and Medium priority groundwater basins. Based on the 2014 Final Basin Prioritization by the State Department of Water Resources (DWR), there are five high and medium priority groundwater basins mapped in San Luis Obispo County:



Learn more about SGMA at the State’s website:



Local Action: On January 13, 2015, the County of San Luis Obispo and Flood Control District Board adopted the SGMA Strategy and subsequently amended on various dates. The overarching strategy seeks to “establish community focused Groundwater Sustainability Agencies (GSA) based on cooperative interagency and stakeholder relationships in order to comply with SGMA requirements.” It also describes specific actions such as seeking the maximum feasible funding through grant applications, supporting establishment of organizational agreements, and maximum feasible outreach to all potentially affected stakeholders.


SGMA implementation updates to the San Luis Obispo County Board of Supervisors:



Interactive Map of Groundwater Basins in San Luis Obispo County

Welcome to the SGMA Interactive Data Viewer for the San Luis Obispo County! This is an interactive mapping system to help you to navigate around the groundwater basins by panning, zooming, or searching for a specific parcel or street address. There are different map layers that can be shown and superimposed in this interactive mapping system such as boundaries of groundwater basins, cities, roads, SGMA eligible entities, and others by checking the layer names indicated on the left panel layer menu. To search and locate a specific APN or street address on the map:


1. Enter either the nine-digit parcel number (APN) including hyphens or the complete street address in the “Search...” bar on the upper right hand corner of the map screen and then click on the search button to locate it. The APN or street address that you just entered will appear on the left panel and a location marker will show up on the map to identify the location.

2. Click on the APN or street address name shown on the left panel layer menu will zoom in to the specified location for a close-up look


Click here to open the Interactive Map of Groundwater Basins in San Luis Obispo County in a new window




Funding Opportunities - Proposition 1 Sustainable Groundwater Planning Grant Program

Sustainable Groundwater Planning (SGWP) Grant Program: Proposition 1, approved by the voters on November 4, 2014, authorized the legislature to appropriate $100-million to the Department of Water Resources (DWR) to establish the SGWP grant program. The SGWP Grant Program is designed to encourage sustainable management of groundwater resources by providing funding for projects that support sustainable groundwater management planning and implementation.



  • San Luis Obispo County Board of Supervisors Resolution No. 2015-302 dated November 17, 2015 authorized the County to file the grant application and execute an agreement for the Sustainable Groundwater Planning "Counties with Stressed Basins" grant program.

  • The County submitted the 2015 County of San Luis Obispo Groundwater Proposal on December 8, 2015 to the California Department of Water Resources for the maximum project funding amount of $250,000.

  • On September 9, 2016, the Proposition 1 - SGWP Grant Agreement No. 4600011507 was executed between the County and DWR. View the grant agreement work plan.



Basin Boundary Modifications

The California Department of Water Resources (DWR) implemented new basin boundary regulations on November 16, 2015. The basin boundary modification is anticipated to be finalized in the updated Bulletin 118 in early 2017. DWR anticipates another basin boundary modifications request starting in 2018. The list of Final Approved Basin Boundary Modifications can be found on the DWR Basin Boundary Modification webpage.


Additional information regarding Basin Boundary Modifications



Groundwater Sustainability Agency (GSA) Formation and Groundwater Sustainability Plan (GSP) Development

SGMA established a new structure for managing California’s groundwater resources at a local level by local agencies. SGMA requires the formation of locally-controlled groundwater sustainability agencies (GSAs) in the State’s priority groundwater basins. SGMA also requires that GSAs develop and implement a groundwater sustainability plan (GSP) to meet the sustainability goal of the basin or subbasin to ensure that it is operated within its sustainable yield, without causing undesirable results.



Additional Information on SGMA


SGMA Mailing List

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