Santa Maria River Valley Groundwater Basin

Final Basin Boundary Modifications Released

The California Department of Water Resources (DWR) has released the 2018 Final Basin Boundary Modifications decisions and accompanying documents. 

Click on the following links to view the 2018 Final Basin Boundary Modifications results:

For additional information, please visit DWR’s Basin Boundary Modifications website by clicking here.

Potential Basin Boundary Modification Request

The Santa Maria Basin Fringe Areas – County of San Luis Obispo Groundwater Sustainability Agency (GSA) is submitting an initial notification to the California Department of Water Resources (DWR) of the GSA’s decision to explore boundary modification(s) for the Santa Maria River Valley Groundwater Basin (Bulletin 118 Basin No. 3-12; “Santa Maria Basin”).  A majority of the Santa Maria Basin is subject to the adjudication stipulated in 2005; however, there are multiple “fringe areas” in the Santa Maria Basin located outside of the adjudicated area.  All five non-adjudicated “fringe areas” within the County of San Luis Obispo will be considered for the basin boundary modification request. 

How do I get involved?

For more information please contact Dick Tzou via email or call (805) 781-4473.

Interactive Map of Santa Maria River Valley Groundwater Basin 

Welcome to the SGMA Interactive Data Viewer for the Santa Maria Groundwater Basin! This is an interactive mapping system to help you to navigate around the Santa Maria 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

Sign up for the SGMA Mailing List

Please select from the following list(s):

Contact Public Works via web form, email, or call us at (805) 781-5252.