Perfluorooctanoic acid
12.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: Three PFAS, PFNA, PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); lithium sits above a screening level, and a past health-based violation (E. coli) is on record. Aqua Pa Main System serves 822,600 residents.
Your water bill or annual water quality report names your actual supplier.
Also supplies: King of Prussia, Willow Grove, Ardmore, Yeadon, Broomall, Lansdowne, Darby, Conshohocken, Collingdale, Ridley Park, Glenolden, Clifton Heights, Folcroft, Swarthmore, Prospect Park, Sharon Hill, Norwood, Media, Jenkintown, Narberth, Aldan, Malvern, Morton, East Lansdowne
Each bar is drawn in blocks of its own limit, so the length shows how far above it the result sits.
12.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
9.2ng/L
Each block = 4.0 ng/L federal MCL (2024)
12ng/L
Each block = 10 ng/L federal MCL (2024)
AQUA PA MAIN SYSTEM (EPA PWSID PA1460073) delivers surface water to 822,600 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.
2health-based violations in the last 10 years
From EPA SDWIS. Counted once per contaminant per year, as in the Track record score.
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.
Every filing is listed; the Track record score counts at most one per contaminant per year.
Resolved
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A tap test can confirm levels at your home before you choose treatment.
PFOA 12.6 ng/L, above the 4 ng/L limit (+8 more PFAS detected)
Lithium 15.7 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.
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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 Drexel Hill 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 Drexel Hill, PFOA 12.6 ng/L (limit 4 ng/L), PFOS 9.2 ng/L (limit 4 ng/L) and PFNA 12 ng/L (limit 10 ng/L) were measured above their limits in EPA's 2024 testing; one health-based violation is on record (E. coli). AQUA PA MAIN SYSTEM (PWSID PA1460073) has a Purity Score of 53/100 (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.
AQUA PA MAIN SYSTEM (PWS ID PA1460073) is the public water system on record for Drexel Hill, Pennsylvania, serving about 822,600 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
Yes. In EPA's UCMR 5 testing (2024-02-01 to 2024-12-11), PFOA was measured at 12.6 ng/L against a 4 ng/L federal limit, PFOS was measured at 9.2 ng/L against a 4 ng/L federal limit and PFNA was measured at 12 ng/L against a 10 ng/L federal limit. PFBS (9.5 ng/L, below the 2,000 ng/L EPA health advisory), PFHxA (17.2 ng/L, below the 400,000 ng/L state limit) and PFHxS (7.7 ng/L, below the 10 ng/L federal limit) were also detected. PFBA (10.1 ng/L), PFHpA (6.9 ng/L) and PFPeA (21.8 ng/L) were also detected; they have no federal or state limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap.
Lead is not in Drexel Hill'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.
The federal SDWIS record lists a health-based violation for AQUA PA MAIN SYSTEM within about the last ten years: E. coli (2017). The findings above show each one's status.
PurityMap's current record for Drexel Hill holds 32 findings: 5 above a reference, 3 detected within the reference, 3 detected with no limit and 21 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 |
|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) | 12.6 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorooctanesulfonic acid (PFOS) | 9.2 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Lithium | 15.7 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 | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorononanoic acid (PFNA) | 12 ng/L | 10 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| E. coli | = | Federal MCL | Above the listed reference | 2017 | EPA SDWIS Violations & Enforcement: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorohexanesulfonic acid (PFHxS) | 7.7 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorobutanesulfonic acid (PFBS) | 9.5 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorohexanoic acid (PFHxA) | 17.2 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorobutanoic acid (PFBA) | 10.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoroheptanoic acid (PFHpA) | 6.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoropentanoic acid (PFPeA) | 21.8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| 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 | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| 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 | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| 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 | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| 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 | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| 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 | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2025–2025 monitoring period | Lead & Copper Rule 90th-percentile: AQUA PA MAIN SYSTEM (PA1460073) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-01 to 2024-12-11 | UCMR5 Analytical Results: AQUA PA MAIN SYSTEM (PA1460073) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorobutanesulfonic acid (PFBS)
Perfluorohexanoic acid (PFHxA)
Perfluoroheptanoic acid (PFHpA)
Perfluoropentanoic acid (PFPeA)
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)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoropentanesulfonic acid (PFPeS)
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: AQUA PA MAIN SYSTEM (PA1460073)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: AQUA PA MAIN SYSTEM (PA1460073)
US EPA SDWIS
State SDWIS Compliance Record
EPA SDWIS Violations & Enforcement: AQUA PA MAIN SYSTEM (PA1460073)
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 Aqua Pa Main System reported something related, it's shown below.
Lead at Aqua Pa Main System: not detected (90th percentile, 2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.