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.
4
health-based violations
84
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2019-07-01 → 2019-12-31 |
| TT | Health-based | Resolved | 2019-07-01 → 2019-12-31 |
| TT | Health-based | Resolved | 2019-07-01 → 2019-12-31 |
| TT | Health-based | Resolved | 2019-07-01 → 2019-12-31 |
| MR | Monitoring | Resolved | 2023-04-01 |
| MR | Monitoring | Resolved | 2023-04-01 |
| Other | Monitoring | Resolved | 2022-02-10 |
| MR | Monitoring | Resolved | 2022-01-01 → 2022-06-30 |
| MR | Monitoring | Resolved | 2022-01-01 → 2022-06-30 |
| MR | Monitoring | Resolved | 2022-01-01 → 2022-06-30 |
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 |
|---|---|---|---|---|
| Copper | 273.18 µg/L 21% of the EPA limit 1300 µg/L
worst single sample: 690 µg/L | 422/424 | SYR4 | 2012–2019 |
| Dibromochloromethane | 4.147 µg/L No EPA limit set
worst single sample: 7.7 µg/L | 312/320 | SYR4 | 2012–2019 |
| Bromodichloromethane | 12.988 µg/L No EPA limit set
worst single sample: 17 µg/L | 284/320 | SYR4 | 2012–2019 |
| Chloroform | 51.6 µg/L No EPA limit set
worst single sample: 97 µg/L | 262/320 | SYR4 | 2012–2019 |
| TTHM | 69.05 µg/L 86% of the EPA limit 80 µg/L
worst single sample: 117 µg/L | 260/260 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 48.83 µg/L 81% of the EPA limit 60 µg/L
worst single sample: 80 µg/L | 260/262 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 21.27 µg/L No EPA limit set
worst single sample: 34 µg/L | 243/262 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 28.25 µg/L No EPA limit set
worst single sample: 43 µg/L | 226/262 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 2.972 µg/L No EPA limit set
worst single sample: 4.09 µg/L | 160/262 | SYR4 | 2012–2019 |
| Lead | 13.081 µg/L 87% of the EPA limit 15 µg/L
worst single sample: 1298 µg/L | 159/409 | SYR4 | 2013–2019 |
| Bromoform | 4.9665 µg/L No EPA limit set
worst single sample: 8.74 µg/L | 118/320 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 2.09 µg/L No EPA limit set
worst single sample: 2.8 µg/L | 66/262 | SYR4 | 2012–2019 |
| Nitrate | 3780 µg/L 38% of the EPA limit 10000 µg/L
worst single sample: 3800 µg/L | 52/52 | SYR4 | 2012–2019 |
| Lead | 0.00084 mg/L 5.6% of the EPA limit 0.0150 mg/L | 28/28 | LCR | 2026 |
| Barium | 181.44 µg/L 9.1% of the EPA limit 2000 µg/L
worst single sample: 182 µg/L | 15/15 | SYR4 | 2012–2019 |
| Fluoride | 144 µg/L 3.6% of the EPA limit 4000 µg/L
worst single sample: 150 µg/L | 13/15 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.7616 µg/L No EPA limit set
worst single sample: 3.17 µg/L | 9/262 | SYR4 | 2012–2019 |
| Arsenic | 4.519 µg/L 45% of the EPA limit 10 µg/L
worst single sample: 4.69 µg/L | 7/15 | SYR4 | 2012–2019 |
| Selenium | 2.414 µg/L 4.8% of the EPA limit 50 µg/L
worst single sample: 2.42 µg/L | 7/15 | SYR4 | 2012–2019 |
| Combined Uranium | 14.32 µg/L 48% of the EPA limit 30 µg/L
worst single sample: 14.5 µg/L | 5/5 | SYR4 | 2012–2018 |
| Gross Alpha, Excl. Radon And U | 10.7 pCi/L 71% of the EPA limit 15 pCi/L
worst single sample: 12.2 pCi/L | 5/5 | SYR4 | 2012–2018 |
| Chromium | 1.5065 µg/L 1.5% of the EPA limit 100 µg/L
worst single sample: 1.61 µg/L | 4/15 | SYR4 | 2012–2019 |
| Atrazine | 0.1979 µg/L 6.6% of the EPA limit 3 µg/L
worst single sample: 0.2010 µg/L | 3/17 | SYR4 | 2012–2019 |
| Trichloroethylene | 0.6235 µg/L 12% of the EPA limit 5 µg/L
worst single sample: 0.6300 µg/L | 2/60 | SYR4 | 2012–2019 |
| Lithium | 14 µg/L No EPA limit set | 2/10 | UCMR-5 | 2024 |
| 2,4-D | 0.9030 µg/L 1.3% of the EPA limit 70 µg/L | 1/4 | SYR4 | 2012–2018 |
| Combined Radium (-226 And -228) | 1.08 pCi/L 22% of the EPA limit 5 pCi/L | 1/5 | SYR4 | 2012–2018 |
| Mercury | 0.2300 µg/L 12% of the EPA limit 2 µg/L | 1/15 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 900 µg/L 9% of the EPA limit 10000 µg/L | 1/1 | SYR4 | 2018 |
| Toluene | 0.5500 µg/L 0.1% of the EPA limit 1000 µg/L | 1/60 | SYR4 | 2012–2019 |
69 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-TP4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNetfosaaNfdhaNmefosaaNitritePFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Middlesex Water Company
Is Middlesex Water Company tap water safe to drink?
EPA monitoring detected 34 contaminants in Middlesex Water Company'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 Middlesex Water Company's water?
EPA monitoring detected Copper, Dibromochloromethane, Bromodichloromethane, Chloroform, TTHM, and others. The full list with the level and data source for each is above.
How many people does Middlesex Water Company serve?
Middlesex Water Company reports serving 233,376 people in New Jersey, per its EPA record.
Has Middlesex Water Company had any water quality violations?
The EPA has 84 violations on file for Middlesex Water Company, of which 4 are health-based (a contaminant limit or required treatment was breached) and 0 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.