Groundwater Data

USGS Groundwater Data

Groundwater is water that flows or seeps downward and saturates soil or rock, supplying springs and wells. Groundwater often begins as precipitation and soaks into the ground where it is stored underground in rock crevices and in the pores of geologic materials (these are aquifers), the same way as water fills a sponge. The upper surface of the saturated zone is called the water table.

Monthly Groundwater Level

Click here to go to the Groundwater Main Page for more information.

Current Groundwater information maps are listed by county, categorized by water table, or confined aquifer, with 5 year information. This information is based on monthly readings from selected wells in the MD-DE-DC Water Science Center.

Water-Table Wells
View water table well data by county for Maryland and Delaware, or by jurisdiction for Baltimore City and D.C.

Real-Time Groundwater

View Real-Time Groundwater Wells by Region:

Maryland

Delaware

District of Columbia

The Real-Time Groundwater Level Network contains water level data that is typically recorded every 15-60 minutes, and transmitted to USGS offices every few hours. Transmissions may be more frequent during critical events. * Note: This is provisional data and is subject to revision.

Click here to view the Real-Time Groundwater Network

Click here to view the region-wide Groundwater Real-Time Table