// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | ⚠ Superfund / Contamination Site |
| Operator / Branch | US Navy / EPA |
| Host County | Rockingham County NH |
| Nearest City | Pepperell MA |
| Primary Risk Radius | 5 miles |
| Secondary Risk Radius | 25 miles |
// Strategic Significance
Portsmouth Naval Shipyard on Seaveys Island contains PCBs solvents and heavy metals from over 200 years of naval operations including nuclear submarine work. Groundwater and Piscataqua River sediment contamination are documented. The site is an active military installation with ongoing cleanup.
// Civilian Impact Assessment
Portsmouth and Kittery ME area residents face ongoing groundwater and river sediment contamination. The Piscataqua River provides water recreation and fishing affected by contamination.
// Evacuation & Shelter Guidance
Rockingham County residents near the shipyard should follow EPA and Navy guidance on recreational water use and fish consumption from the Piscataqua River.