Santa Clara Valley – San Mateo Plain
Statistics
- Basin Name
- Santa Clara Valley – San Mateo Plain
- Basin Number
- 2-009.03
- SGMA Basin Priority
- Very Low
- Critically Overdrafted
- No
- Hydrologic Region Name
- San Francisco Bay
- Counties
- San Mateo
Basin Notes
2003: Bulletin 118 basin description
2017: San Mateo Plain Groundwater Subbasin: A Local Case Study, Stanford University
2018: Basin prioritization comments –
- Declining groundwater levels: 1) CASGEM/WDL/GWIDS: No data or data insufficent to determine GWL status. Source: DWR 2) One hydrograph in Groundwater Reliability Partnership for the San Mateo Plain Sub-basin presentation, Slide 12, showed groundwater levels increasing 1962 to 2015. Source: GRP_Presentation_10_19_15_FINAL.pdf
- Salt intrusion: 1) According to the Regional Water Quality Control Board (RWQCB), saltwater intrusion has occurred to groundwater within the San Mateo Plain sub-basin. The DWR found that groundwater quality in the sub-basin contains high concentrations of sodium; samples from wells in the area also found concentrations of nitrates/nitrogen in excess of maximum contaminant levels established by the California Department of Health Services and the United States Environmental Protection Agency.
San Mateo Plain subbasin given draft medium priority, subjecting it to SGMA
Final Basin Prioritization: Very Low.
At-A-Glance
Source: CA DWR
California Water Library Documents About This Basin
San Mateo Plain Groundwater Basin Assessment
San Mateo County | July 12th, 2018
On behalf of the County of San Mateo, EKI Environment & Water, Inc., Todd Groundwater, and HydroFocus, Inc. (the Project Team) have prepared this report to summarize
Groundwater Quality in the San Francisco Bay Groundwater Basins, California
U.S. Geological Survey (USGS) | March 29th, 2013
Status and Understanding of Groundwater Quality in the San Francisco Bay Groundwater Basins, 2007: California GAMA Priority Basin Project
U.S. Geological Survey (USGS) | March 29th, 2013
Groundwater quality in the approximately 620-square-mile (1,600-square-kilometer) San Francisco Bay study unit was investigated as part of the Priority Basin Project of t