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.
11
health-based violations
434
violations on file
4
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2011-01-01 → 2011-01-31 |
| MCL | Health-based | Resolved | 2011-01-01 → 2011-01-31 |
| MCL | Health-based | Resolved | 2011-01-01 → 2011-01-31 |
| MCL | Health-based | Resolved | 2011-01-01 → 2011-01-31 |
| MCL | Health-based | Resolved | 2005-04-01 → 2005-04-30 |
| MCL | Health-based | Resolved | 2005-04-01 → 2005-04-30 |
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 |
|---|---|---|---|---|
| Nitrate | 6818.9 µg/L 68% of the EPA limit 10000 µg/L
worst single sample: 9390 µg/L | 150/150 | SYR4 | 2012–2019 |
| Chloroform | 7.69 µg/L No EPA limit set
worst single sample: 27.4 µg/L | 81/117 | SYR4 | 2012–2019 |
| Dibromochloromethane | 9.055 µg/L No EPA limit set
worst single sample: 12.3 µg/L | 71/117 | SYR4 | 2012–2019 |
| Bromodichloromethane | 9.5495 µg/L No EPA limit set
worst single sample: 14.8 µg/L | 70/117 | SYR4 | 2012–2019 |
| Bromoform | 4.071 µg/L No EPA limit set
worst single sample: 4.8 µg/L | 67/117 | SYR4 | 2012–2019 |
| TTHM | 29.233 µg/L 37% of the EPA limit 80 µg/L
worst single sample: 57.7 µg/L | 67/68 | SYR4 | 2012–2019 |
| Copper | 1388 µg/L 107% of the EPA limit, at the 95th percentile of samples — 1300 µg/L
worst single sample: 1830 µg/L | 65/89 | SYR4 | 2012–2018 |
| Lead | 16.8 µg/L 112% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 29.5 µg/L | 61/64 | SYR4 | 2012–2018 |
| Total Haloacetic Acids (HAA5) | 11.53 µg/L 19% of the EPA limit 60 µg/L
worst single sample: 14.9 µg/L | 61/68 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 3.839 µg/L No EPA limit set
worst single sample: 6.57 µg/L | 59/68 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 4.1 µg/L No EPA limit set
worst single sample: 8.2 µg/L | 31/68 | SYR4 | 2012–2019 |
| Barium | 492.2 µg/L 25% of the EPA limit 2000 µg/L
worst single sample: 791 µg/L | 19/25 | SYR4 | 2012–2018 |
| Lead | 0.0084 mg/L 56% of the EPA limit 0.0150 mg/L | 19/19 | LCR | 2026 |
| Trichloroacetic Acid | 2.593 µg/L No EPA limit set
worst single sample: 2.71 µg/L | 19/68 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.9035 µg/L No EPA limit set
worst single sample: 3.15 µg/L | 18/68 | SYR4 | 2012–2019 |
| Thallium, Total | 1.398 µg/L 70% of the EPA limit 2 µg/L
worst single sample: 1.45 µg/L | 14/25 | SYR4 | 2012–2018 |
| Gross Alpha, Excl. Radon And U | 4.194 pCi/L 28% of the EPA limit 15 pCi/L
worst single sample: 4.32 pCi/L | 13/19 | SYR4 | 2012–2018 |
| Combined Radium (-226 And -228) | 1.4495 pCi/L 29% of the EPA limit 5 pCi/L
worst single sample: 1.58 pCi/L | 10/24 | SYR4 | 2012–2018 |
| Chromium | 8.3305 µg/L 8.3% of the EPA limit 100 µg/L
worst single sample: 11.4 µg/L | 8/25 | SYR4 | 2012–2018 |
| Monochloroacetic Acid | 7.545 µg/L No EPA limit set
worst single sample: 7.93 µg/L | 6/68 | SYR4 | 2012–2019 |
| Combined Uranium | 1.65112 µg/L 5.5% of the EPA limit 30 µg/L
worst single sample: 1.6539 µg/L | 5/24 | SYR4 | 2012–2018 |
| Mercury | 0.0726 µg/L 3.6% of the EPA limit 2 µg/L
worst single sample: 0.0730 µg/L | 5/24 | SYR4 | 2012–2018 |
| Beryllium, Total | 0.0947 µg/L 2.4% of the EPA limit 4 µg/L
worst single sample: 0.0980 µg/L | 4/25 | SYR4 | 2012–2018 |
| Tetrachloroethylene | 2.842 µg/L 57% of the EPA limit 5 µg/L
worst single sample: 2.91 µg/L | 3/49 | SYR4 | 2012–2019 |
| Fluoride | 297 µg/L 7.4% of the EPA limit 4000 µg/L | 1/25 | SYR4 | 2012–2018 |
| Lithium | 9.76 µg/L No EPA limit set | 1/14 | UCMR-5 | 2025 |
51 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosBenzeneChlorobenzeneCyanideCadmiumCarbon TetrachlorideDichloromethaneEthylene DibromideEthylbenzeneHfpo-DaNetfosaaNfdhaNmefosaaPfdaPfdoaPfeesaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaSeleniumStyreneTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Hopatcong Water Dept
Is Hopatcong Water Dept tap water safe to drink?
EPA monitoring detected 32 contaminants in Hopatcong Water Dept'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 Hopatcong Water Dept's water?
EPA monitoring detected Nitrate, Chloroform, Dibromochloromethane, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.
How many people does Hopatcong Water Dept serve?
Hopatcong Water Dept reports serving 7,224 people in New Jersey, per its EPA record.
Has Hopatcong Water Dept had any water quality violations?
The EPA has 434 violations on file for Hopatcong Water Dept, of which 11 are health-based (a contaminant limit or required treatment was breached) and 4 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.