Staff measures water wells in seven major groundwater basins in Lake County. These are the wells that are normally measured in April and October of each year to assess groundwater conditions. Based on those measurements, groundwater conditions within each groundwater basin are summarized. These summaries are general statements and due to varying aquifer conditions do not cover all conditions. Individual well owners may experience conditions substantially different than the general condition (some of our wells show markedly different conditions than other nearby wells) and problems are more likely with shallow wells.
Current hydrographs (plots of water level over time) of the wells measured are available on the Well Hydrographs page.
If you would like the long-term data for a specific monitoring well or location, please email William Fox.
A subset of the biannual monitor wells are measured monthly in Big Valley. Six of the wells are in the western half of the valley and are primarily under the influence of Adobe Creek. Six of the wells are in the eastern half of the valley and are primarily under the influence of Kelsey Creek. A water quality monitoring program is starting as required under the Big Valley Basin Groundwater Sustainability Plan (BVGSP), along with a host of other projects and management actions. To get caught up, visit the BVGSP page!