No open health-based violations on EPA record in the last 10 years.
Serves about 5,464 people (2,404 connections) with surface water from its own intake.
From EPA's record for MI0006270. PurityMap is independent of City of St. Clair.
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1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2024 | Lead and copper rule revisions | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2025 to September 2025.
| 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 | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| 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 | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| 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 | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| 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 | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| 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 | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| 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 | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| 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 | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-17 | UCMR5 Analytical Results: ST. CLAIR, CITY OF (MI0006270) |
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 →City of St. Clair's phone number on EPA record is 810-329-7121. Its mailing address is 547 N CARNEY DR, ST. CLAIR, MI 48079.
According to EPA's record, City of St. Clair uses surface water from its own intake.
EPA's record shows 1 health-based violation for City of St. Clair in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. EPA also lists 4 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in City of St. Clair's latest lead and copper round, which ended in December 2023, was 2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for City of St. Clair. Its phone number on EPA record is 810-329-7121. Its mailing address on EPA record is 547 N CARNEY DR, ST. CLAIR, MI 48079. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.