San Luis Obispo Valley Groundwater Basin

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Groundwater Sustainability Plan & Annual Reporting

For additional information on the SLO Basin GSP and First Annual Report, please click here.


In 2015, the State legislature approved an important new groundwater management law known as the Sustainable Groundwater Management Act (SGMA). SGMA requires that high and medium priority basins comply with the new law – DWR designated San Luis Obispo Valley Basin as a high priority basin. The County of San Luis Obispo and the City of San Luis Obispo formed Groundwater Sustainability Agencies within their respective jurisdictions to cover the entire San Luis Obispo Valley Groundwater Basin (SLO Basin). The map below shows those areas subject to SGMA.

Interactive Map of San Luis Obispo Valley Groundwater Basin 

Welcome to the SGMA Interactive Data Viewer for the San Luis Obispo Valley Basin! This is an interactive mapping system to help you to navigate around the San Luis Obispo Valley groundwater basin by panning, zooming, or searching for a specific parcel or street address that you would like to locate. 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

How do I get involved?

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