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.

Basins with SGMA efforts mapped in San Luis Obispo County, based on the 2019 Final Basin Prioritization by the State Department of Water Resources (DWR):

• Arroyo Grande (Very Low Priority)
• Atascadero (Very Low Priority)
• Cuyama Valley (High Priority)
• Los Osos and Warden Creek (Very Low Priority)
• Paso Robles (High Priority)
• San Luis Obispo (Edna) Valley (High Priority)
• Santa Maria (Very Low Priority)

Learn more about SGMA by visiting the State's website:

• DWR Sustainable Groundwater Management
• DWR Groundwater Portal

NOTE: For information on current groundwater studies, please visit the following links: 

• Adelaida Area Hydrogeologic Study
• Paso Basin Aerial Groundwater Mapping Study