Maryland Department of Natural Resources

Hydrogeology and Hydrology Program

  • Monitoring

    Monitoring groundwater levels is essential for assessing effects of withdrawals on the resource

  • Aquifer Framework

    Mapping the aquifer system framework is critical to understanding the flow system

  • Groundwater Quality

    Chemical sampling determines aquifer water-quality characteristics and identifies areas of degraded water quality

  • Flow Modeling

    Groundwater-flow modeling is a crucial tool in determining long-term sustainability

The Hydrogeology and Hydrology Program of the Maryland Geological Survey conducts applied research of the groundwater and surface water of the State of Maryland. The Program continues a long history of water-resource investigations by the Maryland Geological Survey that began over a century ago. The Program frequently partners with federal, state, and local government to provide critical information and analysis for effective water-resource management.


Over the course of many decades the Program has explored and mapped the aquifer system framework and natural groundwater quality across much of the State. In addition, the Program, in cooperation with the U.S. Geological Survey, maintains an extensive groundwater-level and water-quality data network. Data collected by the Program is used for resource assessment, and to construct and calibrate groundwater-flow models for prediction of potential effects of future water demand and changes in climate.


The Program currently consists of seven hydrogeologists along with support staff located at the Baltimore headquarters and at a field office in Annapolis.