Groundwater Basics: This page provides essential educational information regarding groundwater, such as: What is groundwater? Why is groundwater important? What do we know about groundwater? What are we doing about groundwater?
Groundwater Monitoring: On this page you can read a brief summary of current monitoring results and trends in Napa County.
DIY Groundwater Monitoring Tool Available on Loan-Basis: This page describes the County's new program for residents interested in measuring their own well depths.
Sustainable Groundwater Management Act (SGMA): This page provides information on the SGMA and local efforts to comply with the Act and CA regulations.
Use the Map! Click on an area in the map below and you will find a link to more details about groundwater conditions in that specific subarea of Napa County. You may also enter a address, city or zip above the legend to zoom to an area of interest. Please note that some areas do not have additional subarea monitoring information.
Central Interior Valleys
Napa River Marshes
Southern Interior Valleys
Agricultural Irrigation Well
Measuring Well Water Level
Well Drilling Rig