Groundwater Studies

Groundwater is an important natural resource in Vermont. Vermonters depend on groundwater for their drinking water supply, agriculture, manufacturing and to support aquatic habitat. Groundwater quantity and quality vary with climate, precipitation, overlying land use, and the rock and soil types through which it moves.

Man exploring leaf-littered fractured rock in late autumnVermont's geology, characterized by deformed (folded, faulted, fractured) rock and a variety of unconsolidated glacial deposits, is the vessel for Vermont's groundwater resources. The Geological Survey maps bedrock and surficial materials, samples water for chemistry as it relates to geologic materials and conducts regional to local studies of groundwater. 

water gushing from well headStatewide Groundwater Studies:  Compilation and assessment of existing datasets, 2010. 

County Groundwater Resource Maps were produced at a scale of 1:100,000 based on the statewide analyses.

Town  and Watershed Groundwater Projects are conducted  in order to understand groundwater sustainability and  quality for public and private water supplies. Arsenic, radionuclides, nitrates and other contaminants have been studied.
Bennington maps as a base for PFOA investigations.

We use a variety of methods for aquifer characterization.The ITRC recently published a guidance document for remediation of contaminated fractured rock sites.

Groundwater protection, management, regulations/rules and coordination

Drought links

2003 Report to the legislature on the status of groundwater and aquifer mapping.

Water well data summary , 2007. Water well locations will be updated in 7 Vermont counties in 2017 - 2019.

Water use  (Medalie and Horn, 2010) and well interference studies (Vermont Rural Water Association, 2009). Water use maps for towns in Addison,  Bennington and Chittenden counties (produced by Green Mountain College, 2015). In 2018, the VGS is upgrading well locations by county and plans to complete 7 counties by the end of 2019.  

The Future of Vermont's Drinking Water Workshops, 2017