Is Portsmouth, New Hampshire tap water safe?
2 water systems report serving Portsmouth. Your water depends on which one serves your address. Check your bill if unsure.
C
Portsmouth Water Works
Serves 33,000 people · Surface water · Full report →
No health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2024).
A
Pease Trade Port
Serves 9,900 people · Groundwater · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).