Maryland Department of Natural Resources

Interactive Water-Level Mapper Tool

Monitoring groundwater levels is critical to determine if well withdrawals are sustainable. The Maryland Geological Survey (MGS), in cooperation with the U.S. Geological Survey, maintains a State-wide network of obsevation wells. In addition, MGS operates observation-well networks in Anne Arundel, Charles, Queen Anne's, and St. Mary's Counties, with funding support from those counties.

The map below shows the locations of the observation wells. Water-level data, stored in the U.S. Geological Survey's National Water Information System, can be accessed by clicking on the individual sites.

Potomac Group Patuxent Lower Patapsco Upper Patapsco Magothy Monmouth Aquia Nanjemoy Piney Point Calvert aquifer system Choptank Manokin Ocean City Pocomoke Surficial water table other aquifer Multiple aquifers No aquifer