Perfluorooctanoic acid
11.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
Short answer: Three PFAS, PFHxS, 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. Aqua NJ serves 39,128 residents.
Your water bill or annual water quality report names your actual supplier.
Each bar is drawn in blocks of its own limit, so the length shows how far above it the result sits.
11.6ng/L
Each block = 4.0 ng/L federal MCL (2024)
11.4ng/L
Each block = 4.0 ng/L federal MCL (2024)
10.4ng/L
Each block = 10 ng/L federal MCL (2024)
AQUA NJ - HAMILTON SQUARE (EPA PWSID NJ1103001) delivers surface water to 39,128 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.
A tap test can confirm levels at your home before you choose treatment.
PFOA 11.6 ng/L, above the 4 ng/L limit (+5 more PFAS detected)
Lithium 27.5 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.
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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 Hamilton Square 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 Hamilton Square, PFOA 11.6 ng/L (limit 4 ng/L), PFOS 11.4 ng/L (limit 4 ng/L) and PFHxS 10.4 ng/L (limit 10 ng/L) were measured above their limits in EPA's 2024 testing. AQUA NJ - HAMILTON SQUARE (PWSID NJ1103001) has a Purity Score of 57/100 (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 NJ - HAMILTON SQUARE (PWS ID NJ1103001) is the public water system on record for Hamilton Square, New Jersey, serving about 39,128 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 (2025-03-25 to 2025-09-03), PFOA was measured at 11.6 ng/L against a 4 ng/L federal limit, PFOS was measured at 11.4 ng/L against a 4 ng/L federal limit and PFHxS was measured at 10.4 ng/L against a 10 ng/L federal limit. PFHxA (5.4 ng/L, below the 400,000 ng/L state limit) was also detected. PFHpA (3.4 ng/L) and PFPeA (4.6 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 Hamilton Square'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 Hamilton Square holds 31 findings: 4 above a reference, 1 detected within the reference, 2 detected with no limit and 24 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) | 11.6 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorooctanesulfonic acid (PFOS) | 11.4 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Lithium | 27.5 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 | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorohexanesulfonic acid (PFHxS) | 10.4 ng/L | 10 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorohexanoic acid (PFHxA) | 5.4 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoroheptanoic acid (PFHpA) | 3.4 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoropentanoic acid (PFPeA) | 4.6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| 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 | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| 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 | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| 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 | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| 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 | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| 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 | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2024–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| 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 | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-25 to 2025-09-03 | UCMR5 Analytical Results: AQUA NJ - HAMILTON SQUARE (NJ1103001) |
Perfluorooctanesulfonic acid (PFOS)
Perfluorohexanesulfonic acid (PFHxS)
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)
Perfluorobutanesulfonic acid (PFBS)
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 NJ - HAMILTON SQUARE (NJ1103001)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: AQUA NJ - HAMILTON SQUARE (NJ1103001)
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 NJ reported something related, it's shown below.
Lead at Aqua NJ: not detected (90th percentile, 2024–2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.