What EPA records show for Suffolk County Water Authority
EPA system ID NY5110526 · serves Babylon (T), NY · about 1,100,000 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
Suffolk County Water Authority (EPA NY5110526)
What EPA records show for Suffolk County Water Authority, as of October 14, 2026
We found no health-standard violations in EPA's records for this system (NY5110526) since July 1, 2021, as of October 14, 2026.
Lead: 9 in 10 homes tested came in at or below 1.25 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2025–Dec 31, 2027). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 10.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Suffolk County Water Authority use chloramine?
We didn't find chloramine in Suffolk County Water Authority's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
Reported results in EPA records (data as of Oct 14–15, 2026)
EPA's UCMR 5 testing looked for 30 contaminants here and found 10.
PFPeA (a PFAS): found in 53 of 480 samples, average 0.90 ppt, highest 39.4 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFHxA (a PFAS): found in 45 of 480 samples, average 0.70 ppt, highest 43.5 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFOA (a PFAS): found in 19 of 480 samples, average 0.20 ppt, highest 6.5 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFHxS (a PFAS): found in 19 of 480 samples, average 0.20 ppt, highest 10.8 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFOS (a PFAS): found in 13 of 480 samples, average 0.20 ppt, highest 17.4 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFBA (a PFAS): found in 9 of 480 samples, average 0.10 ppt, highest 12.6 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
6:2 FTS (a PFAS): found in 2 of 480 samples, average 0.10 ppt, highest 23.6 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFHpA (a PFAS): found in 4 of 480 samples, average 0.0 ppt, highest 9.6 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFBS (a PFAS): found in 5 of 480 samples, average 0.0 ppt, highest 5.2 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
PFNA (a PFAS): found in 2 of 480 samples, average 0.0 ppt, highest 5.7 ppt (EPA UCMR 5 testing, Jan 2023–Sep 2025)
Lead: 9 in 10 homes tested came in at or below 1.25 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2025–Dec 31, 2027). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
Source: EPA SDWIS (ECHO SDWA bulk download), data as of Oct 14, 2026
Source: EPA UCMR 5 occurrence data, data as of Oct 15, 2026
These are EPA's public records for this water system, shown as of October 14, 2026. If you represent this utility, or think a record here is wrong, tell us: Report an error. If the error is in EPA's own records, your state drinking water program can correct it there, and this page updates at our next data refresh.
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