Long-term, systematic monitoring programs are essential to provide data for improved evaluation of water resources, conditions, water use, storage, and effective water resource planning. The County uses a well network of public and privately owned wells to understand current conditions of groundwater and detect long-term trends.
Explore the geology and groundwater levels in your area with Napa County’s collection of interactive maps. ** These maps are best viewed on desktop computer, laptop, or tablet using Google Chrome, Safari, or Microsoft Edge.