Accomack County, Virginia: drinking water report. Accomack County occupies the southern two-thirds of Virginia's Eastern Shore, a narrow peninsula between…
Accomack County occupies the southern two-thirds of Virginia's Eastern Shore, a narrow peninsula between the Chesapeake Bay and Atlantic Ocean. The county includes towns like Chincoteague, Parksley, Onancock, and Wachapreague, with most residents relying on groundwater from the Columbia aquifer or small municipal systems. The coastal geography and agricultural land use create distinct water quality challenges for this rural, sea-level community of roughly 33,000 people.
Eastern Shore Virginia faces documented contamination from multiple sources that affect Accomack County drinking water. The Columbia aquifer, which supplies most private wells and municipal systems in the region, shows elevated levels of naturally occurring radionuclides including radium and uranium, a pattern common in Virginia's Coastal Plain geology. The Virginia Department of Health has issued advisories for private well testing specifically for these contaminants in Eastern Shore counties.
Agricultural runoff represents another significant concern. Accomack County contains some of Virginia's most intensive poultry production, with thousands of chicken houses concentrated in a relatively small land area. Nitrate contamination from poultry waste has been detected in shallow groundwater across the peninsula, particularly affecting private wells that draw from shallower aquifer zones. Studies by Virginia Tech and the Eastern Shore Regional GIS Cooperative have documented nitrate levels exceeding EPA standards in wells near concentrated poultry operations.
PFAS contamination appears in several Virginia coastal communities, though comprehensive testing data for Accomack County remains limited. The Department of Defense has identified PFAS contamination at NASA Wallops Flight Facility in adjacent portions of Accomack, where firefighting foam was used for decades. Testing under EPA's UCMR5 program would provide better data for municipal systems, but many Eastern Shore residents on private wells lack information about these persistent chemicals. Saltwater intrusion adds another dimension to the county's water challenges, as rising sea levels and excessive pumping allow brackish water to move into freshwater aquifers along the coastal margins.
Private well owners should test annually for nitrate, radionuclides, and bacteria, given the documented contamination patterns on the Eastern Shore. Municipal water customers can request their system's latest Consumer Confidence Report to understand specific contaminant levels and treatment methods. Check your water for current testing data, review the water filter guide for treatment options appropriate to Eastern Shore contaminants, access the detailed report for comprehensive water quality information, or visit the Virginia state page for broader context on drinking water across the Commonwealth.