No health-based violations on EPA record since 2016.
Serves about 7,259 people (3,226 connections) with surface water bought from Champlain Water District.
From EPA's record for VT0005098. PurityMap is independent of Williston Water Dept.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2023 to January 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-02-21 to 2023-11-20 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2023-11-20 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2023-11-20 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2023-11-20 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2023-11-20 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-21 to 2024-01-29 | UCMR5 Analytical Results: WILLISTON WATER DEPT (VT0005098) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
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Follow this water →Williston Water Dept's phone number on EPA record is 802-878-1239. Its mailing address is 7900 WILLISTON ROAD, WILLISTON, VT 05495.
According to EPA's record, Williston Water Dept uses surface water bought from Champlain Water District.
No health-based violations on EPA record since 2016. EPA also lists 2 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Williston Water Dept's latest lead and copper round, which ended in December 2025, was 1.2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Williston Water Dept. Its phone number on EPA record is 802-878-1239. Its mailing address on EPA record is 7900 WILLISTON ROAD, WILLISTON, VT 05495. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.