Delineation of the WHPA for a groundwater source must be completed by a PA Registered Professional Geologist. A system can use a default 1/2 mile radius around a groundwater source without the assistance of a Geologist. Watershed delineations should be completed by a professional with sufficient experience to determine an accurate watershed delineation. After September 2003, all public water suppliers should have a completed Source Water Assessment report (SWAP) which will include a basic wellhead or watershed delineation for all sources and a map and list of potential and known contamination risks.
- Status of SWAP program in Pennsylvania
- technical guidance for delineation of wellhead protection areas in
USGS Publications for Pennsylvania Groundwater
- fractured bedrock aquifers
- carbonate aquifers
- unconsolidated aquifers
Zone I WHPA requirements for new wells (Pennsylvania)
Methodology for calculating Zone I (2005)
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If you have any questions about drinking water protection, e-mail Joel Jordan at jjordan@prwa.com or at
