Short answer: No measured result is above a legal limit. St Marys Area Water Auth serves 19,588 residents.
Your water bill or annual water quality report names your actual supplier.
ST MARYS AREA WATER AUTH (EPA PWSID PA6240016) delivers surface water to 19,588 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.
lead 3.31 µg/L, below the 15 µg/L action level (detected below the limit); 32 galvanized lines to replace (context, not a tap measurement)
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
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
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. Marys findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For St. Marys, no regulated PFAS were detected in EPA's 2024 testing; the lead 90th-percentile result was 3.31 µg/L against the 15 µg/L action level. ST MARYS AREA WATER AUTH (PWSID PA6240016) has a Purity Score of 96/100 (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.
ST MARYS AREA WATER AUTH (PWS ID PA6240016) is the public water system on record for St. Marys, Pennsylvania, serving about 19,588 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
None of the 29 PFAS in EPA's UCMR 5 testing (2025-01-22 to 2025-10-07) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
ST MARYS AREA WATER AUTH's most recent lead 90th-percentile result (2025) was 3.31 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
PurityMap's current record for St. Marys holds 31 findings: 1 detected within the 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.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lead (90th percentile) | 3.31 µg/L | 15 µg/L federal action level | Below the listed reference | 2025–2025 monitoring period | Lead & Copper Rule 90th-percentile: ST MARYS AREA WATER AUTH (PA6240016) |
| 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 | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| 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 | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| 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 | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| 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 | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| 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 | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| 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 | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| 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 | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-22 to 2025-10-07 | UCMR5 Analytical Results: ST MARYS AREA WATER AUTH (PA6240016) |
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: ST MARYS AREA WATER AUTH (PA6240016)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: ST MARYS AREA WATER AUTH (PA6240016)
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 St Marys Area Water Auth reported something related, it's shown below.
Lead at St Marys Area Water Auth: 3.31 µg/L (90th percentile, 2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.