Tap water in Portsmouth, OH — ZIP 45663
2 public water systems serving about 51,534 people. PFAS "forever chemicals" have been detected here.
D
Poor
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 45663
Portsmouth City
PWSID OH7300111 · serves 40,475 ·
surface water
0 health-based / 2 total violations (5 yrs)
· PFAS up to 5.4 ppt — above federal limit
Northwest Regional Water District
PWSID OH7300003 · serves 11,059 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 3.5 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology