San Luis Obispo Valley
Statistics
- Basin Name
- San Luis Obispo Valley
- Basin Number
- 3-009
- SGMA Basin Priority
- Medium
- Critically Overdrafted
- No
- Hydrologic Region Name
- Central Coast
- Counties
- San Luis Obispo
- Adjacent Basins
Basin Notes
2003: Bulletin 118 basin description
2014: CASGEM Basin Prioritization medium
2018: Basin prioritization: high. Comments –
- 1) CASGEM/WDL/GWIDS: No data or data insufficent to determine GWL status. Source: DWR 2) The San Luis Obispo Valley Groundwater Basin is situated in the San Luis and Edna Valleys …Groundwater levels reported from wells within the Edna Valley have experienced fluctuations impacting the groundwater storage for the basin. USGS Well # 351258120364501 031S013E19H001M located near Pismo Creek fluctuated between 5 and 80 feet below ground surface between 1958 and 1983. Another well in Edna Valley, CDWR CASGEM 352001N1206071W001, exhibited a decline from 19- to 46-feet since 2012 due mostly to recent drought conditions. Groundwater elevations in Edna Valley has declined between 4.7 to 72.95 feet from 2005 through 2015. Source: 2015 County of San Luis Obispo Sustainable Groundwater Proposal
- Salt intrusion: 1) The alluvium extends out to the ocean but the fresh water portion of the alluvium is upstream of the Marre weir at San Luis Bay Estates. Prior to installation of this weir in the early 1970s, seawater intrusion had occurred as far up the valley as the confluence with See Canyon Creek. Since the installation of the weir and with the supplemental flow from the City of San Luis Obispo wastewater treatment plant, there has not been any seawater intrusion documented upstream of the weir.
Final Basin Prioritization: High.
2022: January 26 – GSP submitted to DWR
2023: April 27 – GSP approved by DWR
At-A-Glance
California Water Library Documents About This Basin
Statement of Findings regarding the Approval of the San Luis Obispo Valley Basin Groundwater Sustainability Plan
California Department of Water Resources (DWR) | April 27th, 2023
San Luis Obispo Valley Groundwater Sustainability Management Plan
San Luis Obispo Groundwater Sustainability Agencies | October 1st, 2021
This document fulfills the GSP development requirement for the SLO Basin. This GSP describes and assesses the groundwater condition of the SLO Basin, develops quantifiab
Water Supply Conditions in Southern California during 1958-1959, Volume II, Water Level Data, Central Coastal and Los Angeles Regions
California Department of Water Resources (DWR) | May 1st, 1961
Bulletin No. 39-58, Water Supply Conditions in Southern California during 1957-1958, Volume II, Precipitation and Water Level Data, Central Coastal and Los Angeles Regions
California Department of Water Resources (DWR) | August 1st, 1960
Bulletin No. 39-57, Water Supply Conditions in Southern California during 1956-1957, Volume II, Precipitation and Water Level Data Central Coastal and Los Angeles Regions
California Department of Water Resources (DWR) | June 16th, 1958
Bulletin No. 39-57 Volume I Bulletin No. 39-57 Volume III Bulletin No. 39-57 Volume IV