Tap water in Allentown, PA — ZIP 18104
3 public water systems serving about 180,193 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 18104
Lca Allentown Division
PWSID PA3390024 · serves 118,000 ·
surface water
0 health-based / 4 total violations (5 yrs)
· PFAS up to 7.5 ppt — above federal limit
Lca Wlsa Central Division
PWSID PA3390073 · serves 47,693 ·
surface water
0 health-based / 8 total violations (5 yrs)
· PFAS up to 5.4 ppt — above federal limit
Swt Main System
PWSID PA3390065 · serves 14,500 ·
surface water
0 health-based / 4 total violations (5 yrs)
· PFAS up to 10.1 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