County of Napa Plans, Reports, & Documents

GSP Workplans & Related Documents

The Napa Valley Subbasin Groundwater Sustainability Plan (GSP), approved by the California Department of Water Resources on January 26, 2023, specified the development of a series of Project and Management Actions that may be implemented to achieve and maintain sustainable groundwater conditions in the Subbasin. The GSP, through Management Actions #1 and #2, specified the need to develop both a Water Conservation Workplan and a Groundwater Pumping Reduction Workplan to help improve groundwater conditions and achieve a reduction in groundwater pumping within the Subbasin. Similarly, the GSP identified known Groundwater Dependent Ecosystems within the Subbasin and associated data gaps. These workplans address the necessary steps and actions needed to achieve groundwater sustainability. The draft Communications and Engagement Plan (CEP) update documents how the County will engage stakeholders over the coming years.

  • Public comments were accepted on the Overview and the 3 Workplans for 90 days.  

A printed copy of all materials can be reviewed by members of the public during regular business hours, Monday through Friday, 8 a.m. to 5 p.m. (closed Noon to 1 p.m.) at: 

Napa County, Dept. of Planning, Building and Environmental Services
1195 Third Street, 2nd Floor
Napa, CA 94559


Draft GSP Workplans

Documents for Review (PDF)
Combined Program Overview: GPR and WC Workplans 

Groundwater Pumping Reduction (GPR) Workplan: Napa Valley Subbasin

Napa County Water Conservation (WC) Workplan: A Guide for Vineyards, Wineries, and Other Water Users

Interconnected Surface Water (ISW) and Groundwater Dependent Ecosystems (GDE) Workplan: Napa Valley Subbasin

Draft Communications and Engagement Plan: Update 2023

Existing Approved Workplan