Groundwater Level Networks

Studies in the Delmarva Peninsula have demonstrated that groundwater in shallow unconfined aquifers near agricultural lands is susceptible to contamination from chemicals applied at the land surface. Observed concentrations of nitrate in shallow groundwater commonly exceed the U.S. Environmental Protection Agency Maximum Contaminant Level of 10 mg/L on the peninsula. Groundwater discharge on the...

The Bucks Branch sub watershed in the Nanticoke River basin has been identified as having one of the highest concentrations of nitrate in surface water of all sites sampled in Delaware. Changes in water quality related to changes in agricultural conservation practices will be seen first in shallow groundwater as groundwater is the major source of nitrate in surface water. Very little research is...

The Anacostia River has been subjected to dredging, filling, contamination, and other human influences for over 200 years. The result of these activities is that the river has been seriously degraded from its natural state. Many groups have been working to reduce the effects of environmental degradation on the water quality and living resources of the Anacostia River, primarily by focusing on...

The U.S. Geological Survey provides unbiased, timely, and relevant information, studies, and data about groundwater resources of the Nation. The USGS monitors groundwater levels in thousands of wells across the U.S. Hundreds of these wells are located in Maryland, Delaware, and the District of Columbia. The MD-DE-DC Water Science Center logs data on approximately 370 groundwater wells throughout...