What was found in ZIP 07840
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3800 µg/L 38% of the EPA limit 10000 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019
Highest in the ZIP: 5260 µg/L — WASHINGTON TWP MUA-SCHOO · 4,986 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 3285 µg/L 33% of the EPA limit 10000 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017 | 1/3 | SYR4 |
| Fluoride | 620 µg/L 16% of the EPA limit 4000 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017 | 2/3 | SYR4 |
| Copper | 233 µg/L 18% of the EPA limit 1300 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019
Highest in the ZIP: 504.8 µg/L — ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2019 | 3/3 | SYR4 |
| Barium | 25.885 µg/L 1.3% of the EPA limit 2000 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017
Highest in the ZIP: 49.51 µg/L — WASHINGTON TWP MUA-SCHOO · 4,986 people · 2018 | 3/3 | SYR4 |
| Nitrite | 45.4 µg/L 4.5% of the EPA limit 1000 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017 | 1/3 | SYR4 |
| TTHM | 33.685 µg/L 42% of the EPA limit 80 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Lead | 20.135 µg/L 134% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Chloroform | 17.675 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.2475 µg/L 19% of the EPA limit 60 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 9.48 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 6.54 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Cyanide | 5.4 µg/L 2.7% of the EPA limit 200 µg/L Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2018 | 1/3 | SYR4 |
| Dibromochloromethane | 5.2975 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Chromium | 3.425 µg/L 3.4% of the EPA limit 100 µg/L Highest in the ZIP: ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2018 | 2/3 | SYR4 |
| Selenium | 2.32 µg/L 4.6% of the EPA limit 50 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017
Highest in the ZIP: 2.86 µg/L — WASHINGTON TWP MUA-SCHOO · 4,986 people · 2018 | 3/3 | SYR4 |
| Monochloroacetic Acid | 2.86 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 1/3 | SYR4 |
| Toluene | 2.8325 µg/L 0.3% of the EPA limit 1000 µg/L Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2019 | 1/3 | SYR4 |
| Bromoform | 1.67 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019
Highest in the ZIP: 2.513 µg/L — ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.48 pCi/L 50% of the EPA limit 5 pCi/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017 | 3/3 | SYR4 |
| Trichloroacetic Acid | 2.4525 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 2.41231 µg/L 8% of the EPA limit 30 µg/L Highest in the ZIP: ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2018 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.76 pCi/L 12% of the EPA limit 15 pCi/L Highest in the ZIP: ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2012 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.509 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 0.9165 µg/L No EPA limit set Main supplier: HACKETTSTOWN MUA · 22,000 people · 2019 | 1/3 | SYR4 |
| Arsenic | 0.5705 µg/L 5.7% of the EPA limit 10 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017
Highest in the ZIP: 0.8810 µg/L — ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2018 | 3/3 | SYR4 |
| Xylenes, Total | 0.8620 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.1870 µg/L 3.7% of the EPA limit 5 µg/L Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2018 | 1/3 | SYR4 |
| Ethylbenzene | 0.1200 µg/L 0% of the EPA limit 700 µg/L Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.0780 µg/L 3.9% of the EPA limit 2 µg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2017
Highest in the ZIP: 0.1062 µg/L — WASHINGTON TWP MUA-SCHOO · 4,986 people · 2018 | 2/3 | SYR4 |
| Beryllium, Total | 0.0746 µg/L 1.9% of the EPA limit 4 µg/L Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2018 | 1/3 | SYR4 |
| Antimony, Total | 0.0600 µg/L 1% of the EPA limit 6 µg/L Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2018 | 2/3 | SYR4 |
| PFOS | 0.0097 µg/L No EPA limit set Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2023 | 1/3 | UCMR-5 |
| PFOA | 0.0091 µg/L No EPA limit set Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2023 | 1/3 | UCMR-5 |
| Pfba | 0.0071 µg/L No EPA limit set Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2023 | 1/3 | UCMR-5 |
| Pfhxa | 0.0043 µg/L No EPA limit set Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2023 | 1/3 | UCMR-5 |
| Pfpea | 0.0042 µg/L No EPA limit set Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: HACKETTSTOWN MUA · 22,000 people · 2025
Highest in the ZIP: 0.0040 mg/L — ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2025 | 3/3 | LCR |
| PFHXS | 0.0033 µg/L No EPA limit set Highest in the ZIP: ALLAMUCHY TWP WATER & SEWER · 5,423 people · 2025 | 1/3 | UCMR-5 |
| PFBS | 0.0030 µg/L No EPA limit set Highest in the ZIP: WASHINGTON TWP MUA-SCHOO · 4,986 people · 2023 | 1/3 | UCMR-5 |
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 the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
Water suppliers serving ZIP 07840
| Supplier | State | Population served |
|---|---|---|
| HACKETTSTOWN MUA | NJ | 22,000 |
| ALLAMUCHY TWP WATER & SEWER | NJ | 5,423 |
| WASHINGTON TWP MUA-SCHOO | NJ | 4,986 |
Frequently asked questions about ZIP 07840 tap water
Is the tap water in ZIP 07840 safe to drink?
EPA testing detected 40 contaminants across the water suppliers serving ZIP 07840. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 07840?
3 public water suppliers report EPA drinking-water monitoring for ZIP 07840. Each is listed above with its population served.
What contaminants are in ZIP 07840's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.