Tap water in Smithtown (T), NY — ZIP 11780
2 public water systems serving about 1,110,587 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 11780
Suffolk County Water Authority
PWSID NY5110526 · serves 1,100,000 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 43.5 ppt — above federal limit
St James Water District
PWSID NY5103266 · serves 10,587 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 6.6 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