Groundwater Sites

Field water-level measurements - Manual measurements of depth to water in wells. These measurements are often used to supplement and (or) verify the accuracy of the instantaneous measurements. Selected sites with at least 10 measurements are included in these maps. The last value available is shown in the pop-up bubble for each site. Because of the large number of sites available the sites have been broken up into three regions. All of California is available but not recommended for slower internet connections. Additional data for groundwater sites.

You may also be interested in multiple-depth water-level measurements - Links to current-condition data and manual measurements of depth to water in multiple-depth wells. Photo, site descriptions and additional information is available from the pop-up bubbles for sites included in this map.

Real-time sites - Current-conditions data transmitted from selected surface-water, ground-water, and lake sites. Values in pop-up bubbles are updated hourly. Additional data for real-time sites.

Data are provisional and subject to revision.