💧 ZIP Water Report

Tap water in Portsmouth, NH — ZIP 03801

2 public water systems serving about 42,900 people. PFAS "forever chemicals" have been detected here.

C
Fair
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5 testing. Levels and the 2024 federal limits are shown per system below.

Water systems serving 03801

Portsmouth Water Works
PWSID NH1951010 · serves 33,000 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 9 ppt — above federal limit
C
Pease Trade Port
PWSID NH1951020 · serves 9,900 · groundwater
0 health-based / 0 total violations (5 yrs) · PFAS up to 20.6 ppt
A

Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology