Parent Layer: RIGIS Data

Name: Wellhead Protection Areas Non Community

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Description: A wellhead protection area (WHPA) is the portion of an aquifer through which groundwater moves to a well. Under the Rhode Island Department of Environmental Management (DEM) Wellhead Protection (WHP) Program approved by the US Environmental Protection Agency in 1990, DEM is responsible for delineating a WHPA for each of the public wells in the state. DEM contracted with the GZA Consulting to delineate select non-community stratified drift wells using analytical modeling and hydrogeologic mapping. As of August 2013, the Rhode Island Department of Health Office of Drinking Water Quality (HEALTH) is responsible for delineating the Calculated Fixed Radius WHPA's for bedrock wells, based on the pump rate of the well. Non-Transient Non-Community Well - regularly serves at least 25 of the same persons (not residents) over 6 months of the year. Examples include wells serving schools and places of employment. Transient Non-Community Well - does not regularly serve the same persons, but does serve at least 25 people at least 60 days of hte year. DEM relied on technical input from the Wellhead Protection Program Advisory Committee in developing the delineation methodology. A mapping approach was required that was scientifically defensible, could be applied consistently across the state, and could be applied with the resources available to DEM. The delineations are based on reasonably available information regarding the hydrogeologic environment and the well characteristics. The WHPAs were delineated using the US Geological Survey quadrangle maps at a scale of 1:24000. WHPA maps are available for review at the DEM Office of Water Resources, on the DEM web page at www.state.ri.us/dem, and on the Rhode Island Geographic Information System webpage at www.edc.uri.edu/rigis.September 2014 updates made by RI Department of Health Office of Drinking Water Quality.

Copyright Text: Jonathan Zwarg, RI Dept Of Environmental Management, Office of Water Resources, Paul Jordan, RI Dept of Environmental Management, Office Of Management Information Service, Amy Parmenter, RI Dept of Health, Office of Drinking Water Quality.

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