Basin Analysis Report for the Napa Valley Groundwater Subbasin - Implementation of the SGMA
Final documents of the Napa Valley Groundwater Sustainability - Basin Analysis Report for the Napa Valley Subbasin available below.
NOTE: The Final Report was submitted to the CA Department of Water Resources (DWR) on December 16, 2016. DWR has provided an extended public comment period until April 1, 2017. Comments can be provided via the DWR SGMA Portal for Alternatives and Reporting. A hard-copy of the report is available for review at the Napa County Flood Control and Water Conservation District office, 804 First St., Napa, (707) 259-8600. An electronic copy of the report is available below.
The 2014 Sustainable Groundwater Management Act (SGMA) provides a framework for sustainable management of groundwater resources by local authorities. The act estabishes a timeline - 20 years - to implement actions that achieve long-term groundwater sustainability. It protects existing surface water and groundwater rights and does not impact drought response measures. The California Department of Water Resources (DWR) is in charge of the SGMA Program and has developed guidelines for local agencies to follow. DWR has also prepared a SGMA brochure to explain the requirements under the Act. A good summary of the SGMA can be found on the Association of CA Water Agencies website.
Napa County and its groundwater consultant completed work to meet the requirements of SGMA, which was in the form of a Basin Analysis Report (one of the Alternatives to a Groundwater Sustainability Plan defined in the Act). This report, Napa Valley Groundwater Sustainability - Basin Analysis Report for the Napa Valley Subbasin, provides an extensive analysis of the groundwater basin and demonstrates it has operated within its sustainable yield and that it is being managed consistent with the goal of SGMA and DWR regulations. The completed report can be downloaded from the document list below.
For medium and high priority groundwater basins/subbasins, a Basin Analysis Report or other Alternative must be submitted to DWR by January 1, 2017. The Napa Valley Subbasin (map) is the only basin in Napa County with a medium priority ranking by DWR that is subject to SGMA at this time.
The Basin Analysis Report for the Napa Valley Subbasin was presented to the Board of Supervisors at a Special Meeting on December 13, 2016. At that meeting, the Supervisors approved the report and its submittal to DWR. The Report was submitted to DWR on December 16, 2016. DWR has provided an extended public comment period until April 1, 2017. Comments may be provided via the DWR SGMA Portal for Alternatives and Reporting.
Bain Analysis Report Documents
Final Documents Submitted to DWR:
12-13-16 Presentation: Our Groundwater Resources: Sustainable Groundwater Management Act - Implementation Update
12-13-16 Presentation: Napa Valley Groundwater Sustainability: A Basin Analysis Report for the Napa Valley Subbasin
Additional local SGMA documents and related information can be found here on the WICC and on Napa County's groundwater webpage. Prior groundwater studies, reports, links, guides and other groundwater items are in the WICC's groundwater information library.
Napa County Groundwater Program Contact
Natural Resources Conservation Manager
Measuring groundwater levels
Installing monitoring well