Copper
1.56mg/L
Each block = 1.3 mg/L federal action level
Short answer: Copper (90th percentile) is above its federal limit; lithium sits above a screening level. Joint Powers Water Board serves 30,922 residents.
Your water bill or annual water quality report names your actual supplier.
Also supplies: Albertville, Hanover
The bar is drawn in blocks of the 1.3 mg/L federal action level, so the length shows how far above it the result sits.
1.56mg/L
Each block = 1.3 mg/L federal action level
Joint Powers Water Board (EPA PWSID MN1860024) delivers groundwater to 30,922 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
2 galvanized lines to replace
Copper (90th percentile) 1.56 mg/L, above the 1.3 mg/L federal action level; Lithium 18.5 µg/L, above the 10.0 µg/L EPA health reference level
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Screening: quick check, not lab-grade
Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
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.
When your results arrive, read them here →
Each card names which St. Michael findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.













PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For St. Michael, no regulated PFAS were detected in EPA's 2024 testing. Joint Powers Water Board (PWSID MN1860024) has a Purity Score of 74/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
Joint Powers Water Board (PWS ID MN1860024) is the public water system on record for St. Michael, Minnesota, serving about 30,922 people. Confirm the utility on your water bill before acting on a specific finding.
Groundwater (primary source of record in EPA SDWIS).
None of the 29 PFAS in EPA's UCMR 5 testing (2025-02-05 to 2025-10-08) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
Lead is not in St. Michael's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
PurityMap's current record for St. Michael holds 32 findings: 2 above a reference and 30 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
Follow St. Michael's water
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 18.5 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Copper (90th percentile) | 1.56 mg/L | 1.3 mg/L federal action level | Above the listed reference | 2026–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: Joint Powers Water Board (MN1860024) |
| Contaminant | Result | Benchmark | 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 | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| 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 | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| 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 | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| 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 | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| 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 | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2026–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: Joint Powers Water Board (MN1860024) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| 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 | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-05 to 2025-10-08 | UCMR5 Analytical Results: Joint Powers Water Board (MN1860024) |
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: Joint Powers Water Board (MN1860024)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: Joint Powers Water Board (MN1860024)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Joint Powers Water Board reported something related, it's shown below.
Lead at Joint Powers Water Board: not detected (90th percentile, 2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.
Copper: 1.56 mg/L (90th percentile, 2026 monitoring period (still open)). The federal action level is 1.3 mg/L.