Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
3
health-based violations
82
violations on file
3
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2006-07-01 → 2006-09-30 |
| MCL | Health-based | Resolved | 2006-07-01 → 2006-09-30 |
| MCL | Health-based | Resolved | 2004-03-01 → 2004-03-31 |
| MR | Monitoring | Archived | 2024-07-01 → 2024-12-31 |
| MR | Monitoring | Archived | 2024-07-01 → 2024-12-31 |
| MR | Monitoring | Archived | 2024-01-01 → 2024-03-31 |
| MR | Monitoring | Archived | 2024-01-01 → 2024-03-31 |
| MR | Monitoring | Archived | 2024-01-01 → 2024-03-31 |
| MR | Monitoring | Archived | 2024-01-01 → 2024-03-31 |
| MR | Monitoring | Archived | 2024-01-01 → 2024-03-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Combined Radium (-226 And -228) | 5.03 pCi/L 101% of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 13.04 pCi/L | 215/371 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 10.627 pCi/L 71% of the EPA limit 15 pCi/L
worst single sample: 38.6 pCi/L | 215/368 | SYR4 | 2012–2019 |
| Dibromochloromethane | 8.12 µg/L No EPA limit set
worst single sample: 13.3 µg/L | 137/186 | SYR4 | 2012–2019 |
| TTHM | 24.73 µg/L 31% of the EPA limit 80 µg/L
worst single sample: 39.5 µg/L | 134/136 | SYR4 | 2012–2019 |
| Bromodichloromethane | 5.3 µg/L No EPA limit set
worst single sample: 6.3 µg/L | 132/186 | SYR4 | 2012–2019 |
| Bromoform | 7.9 µg/L No EPA limit set
worst single sample: 17.2 µg/L | 131/186 | SYR4 | 2012–2019 |
| Chloroform | 4.285 µg/L No EPA limit set
worst single sample: 17.7 µg/L | 122/186 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 7.345 µg/L 12% of the EPA limit 60 µg/L
worst single sample: 16 µg/L | 92/132 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 2.1 µg/L No EPA limit set
worst single sample: 2.8 µg/L | 81/132 | SYR4 | 2012–2019 |
| Nitrate | 4975 µg/L 50% of the EPA limit 10000 µg/L
worst single sample: 5200 µg/L | 66/80 | SYR4 | 2012–2019 |
| Copper | 341 µg/L 26% of the EPA limit 1300 µg/L
worst single sample: 410 µg/L | 59/99 | SYR4 | 2012–2018 |
| Fluoride | 1135 µg/L 28% of the EPA limit 4000 µg/L
worst single sample: 1400 µg/L | 34/36 | SYR4 | 2012–2018 |
| Barium | 130.2 µg/L 6.5% of the EPA limit 2000 µg/L
worst single sample: 187 µg/L | 30/34 | SYR4 | 2012–2018 |
| Nitrate-Nitrite | 4900 µg/L 49% of the EPA limit 10000 µg/L
worst single sample: 5000 µg/L | 21/24 | SYR4 | 2012–2019 |
| Chromium | 3.875 µg/L 3.9% of the EPA limit 100 µg/L
worst single sample: 4.3 µg/L | 18/34 | SYR4 | 2012–2018 |
| Dichloroacetic Acid | 6.08 µg/L No EPA limit set
worst single sample: 6.4 µg/L | 17/132 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 15/15 | LCR | 2023 |
| Trichloroacetic Acid | 6.94 µg/L No EPA limit set
worst single sample: 7.2 µg/L | 14/132 | SYR4 | 2012–2019 |
| Beryllium, Total | 0.6965 µg/L 17% of the EPA limit 4 µg/L
worst single sample: 0.7000 µg/L | 8/34 | SYR4 | 2012–2018 |
| Lead | 19.1 µg/L 127% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 23 µg/L | 7/65 | SYR4 | 2014–2017 |
| Monochloroacetic Acid | 3.54 µg/L No EPA limit set
worst single sample: 3.6 µg/L | 7/132 | SYR4 | 2012–2019 |
| Selenium | 1.185 µg/L 2.4% of the EPA limit 50 µg/L
worst single sample: 1.2 µg/L | 4/34 | SYR4 | 2012–2018 |
| Combined Uranium | 2.96292 µg/L 9.9% of the EPA limit 30 µg/L
worst single sample: 3.1588 µg/L | 3/369 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 0.1270 µg/L 2.1% of the EPA limit 6 µg/L
worst single sample: 0.1300 µg/L | 2/2 | SYR4 | 2018 |
| Lithium | 27.5 µg/L No EPA limit set | 2/9 | UCMR-5 | 2025 |
| Mercury | 0.3410 µg/L 17% of the EPA limit 2 µg/L | 1/29 | SYR4 | 2012–2018 |
70 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCyanideCadmiumCarbon TetrachlorideDichloromethaneDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Aqua Nj - Hamilton Square
Is Aqua Nj - Hamilton Square tap water safe to drink?
EPA monitoring detected 32 contaminants in Aqua Nj - Hamilton Square's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Aqua Nj - Hamilton Square's water?
EPA monitoring detected Combined Radium (-226 And -228), Gross Alpha, Excl. Radon And U, Dibromochloromethane, TTHM, Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does Aqua Nj - Hamilton Square serve?
Aqua Nj - Hamilton Square reports serving 39,128 people in New Jersey, per its EPA record.
Has Aqua Nj - Hamilton Square had any water quality violations?
The EPA has 82 violations on file for Aqua Nj - Hamilton Square, of which 3 are health-based (a contaminant limit or required treatment was breached) and 3 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.