Sonoma Valley Groundwater Basin

View Sonoma Valley Groundwater Basin Map

Are You in the Sonoma Valley Groundwater Basin?

There is a tool on the California Department of Water Resources website that can help you determine the basin where your property is located.

Go to

Some basic instructions:

      1. On the right side of the page, check the box that reads “Bulletin 118 Groundwater Basins.”
      2. Type the property address into the search bar on the map.
      3. A dot will appear that identifies the property location.
      4. The name of the basin will also be in the map.

Sonoma Valley Groundwater Sustainability Agency (GSA)

The Sonoma Valley Groundwater Sustainability Agency (GSA) is a newly-formed public agency and its purpose is to secure groundwater sustainability for the Sonoma Valley groundwater basin. The agency has a governing board, an administrator, and an advisory committee.

Scheduled Meeting Dates

For more information on GSA Board meetings, click here. For more information on advisory committee meetings, click here.

Board of Directors Meetings Advisory Committee Meetings
January 22, 2018 – 4:00 pm January 9, 2018 – 3:00 pm
March 26, 2018 – 4:00 pm February 13, 2018 – 3:00 pm
June 25, 2018 – 4:00 pm  March 13, 2018 – 3:00 pm
August 27, 2018 – 4:00 pm  April 10, 2018 – 3:00 pm