Tap water in Lancaster, PA — ZIP 17520
2 public water systems serving about 126,215 people. PFAS "forever chemicals" have been detected here.
F
Failing
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 17520
City Of Lancaster
PWSID PA7360058 · serves 120,000 ·
surface water
1 health-based / 3 total violations (5 yrs)
· PFAS up to 28.8 ppt — above federal limit
East Petersburg Borough
PWSID PA7360135 · serves 6,215 ·
surface water
0 health-based / 1 total violations (5 yrs)
· PFAS up to 15.2 ppt — above federal limit
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology