The Napa County Groundwater Sustainability Agency oversees Groundwater Sustainability in the County. The Agency is also in charge of creating and carrying out a Groundwater Sustainability Plan (GSP) for the Napa Valley Subbasin. An advisory committee is helping the Agency create the GSP.
The GSP will include policies and recommendations for taking care of and protecting groundwater within the Subbasin for the long term. The committee will submit a draft GSP for the Agency to review by November 1, 2021.
Discover the history of groundwater in Napa County with the interactive timeline.
Everyone in Napa County relies on groundwater. Rural residents and farms use groundwater. Groundwater also supports healthy watersheds. Napa County has been monitoring groundwater since the 1960s. In 2009, the monitoring work was expanded to provide a more complete picture of local conditions.
Today, a Groundwater Sustainability Plan for the Napa Valley Subbasin is being created to make sure that we have a healthy groundwater basin now and in the future. You can take part in creating the Plan. Draft sections are posted on this website. You may review and provide comments at any time.