No health-based violations on EPA record since 2016.
Serves about 5,444 people (1,707 connections) with surface water bought from Bay Area Water System.
From EPA's record for MI0007125. PurityMap is independent of Williams Township.
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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 March 2023 to December 2023.
| 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 | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| 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 | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| 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 | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| 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 | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| 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 | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| 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 | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| 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 | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-12-13 | UCMR5 Analytical Results: WILLIAMS TOWNSHIP (MI0007125) |
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.
Get PurityMap updates about this water system.
Follow this water →Williams Township's phone number on EPA record is 989-439-7237. Its mailing address is 3933 PATTERSON RD, BAY CITY, MI 48706.
According to EPA's record, Williams Township uses surface water bought from Bay Area Water System.
No health-based violations on EPA record since 2016. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Williams Township's latest lead and copper round, which ended in December 2024. The federal action level is 15 µg/L.
PurityMap has no verified website for Williams Township. Its phone number on EPA record is 989-439-7237. Its mailing address on EPA record is 3933 PATTERSON RD, BAY CITY, MI 48706. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.