What was found in ZIP 07866
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 | 2453 µg/L 25% of the EPA limit 10000 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 2055 µg/L 21% of the EPA limit 10000 µg/L Highest in the ZIP: ROCKAWAY BORO WATER DEPT · 7,066 people · 2014 | 2/3 | SYR4 |
| Barium | 754.3 µg/L 38% of the EPA limit 2000 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2017 | 3/3 | SYR4 |
| Fluoride | 230 µg/L 5.8% of the EPA limit 4000 µg/L Highest in the ZIP: ROCKAWAY TWP WATER DEPT · 14,000 people · 2018 | 2/3 | SYR4 |
| Copper | 161.2 µg/L 12% of the EPA limit 1300 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2018
Highest in the ZIP: 209 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2018 | 3/3 | SYR4 |
| Monochloroacetic Acid | 13.35 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 62.54 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 2/3 | SYR4 |
| Lead | 17.9 µg/L 119% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2018
Highest in the ZIP: 40 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2017 | 3/3 | SYR4 |
| TTHM | 16.834 µg/L 21% of the EPA limit 80 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 23.3 µg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2019 | 3/3 | SYR4 |
| Bromoform | 7.08 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 11.015 µg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2019 | 3/3 | SYR4 |
| Selenium | 9.99 µg/L 20% of the EPA limit 50 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2017 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.44 µg/L 14% of the EPA limit 60 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 9.655 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 6.652 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 8.601 µg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 1.9395 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 4.415 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 3.66 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 4.3615 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 1.476 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 4.05 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 2/3 | SYR4 |
| Chromium | 2.4855 µg/L 2.5% of the EPA limit 100 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2017
Highest in the ZIP: 4 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2018 | 2/3 | SYR4 |
| Dichloroacetic Acid | 3.822 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 3.0615 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 3.51 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.35 pCi/L 22% of the EPA limit 15 pCi/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2014 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.72 pCi/L 54% of the EPA limit 5 pCi/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2017 | 2/3 | SYR4 |
| Chloroform | 1.256 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2019
Highest in the ZIP: 2.3 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 0.9100 µg/L 3% of the EPA limit 30 µg/L Highest in the ZIP: ROCKAWAY TWP WATER DEPT · 14,000 people · 2017 | 1/3 | SYR4 |
| Trichloroethylene | 0.6980 µg/L 14% of the EPA limit 5 µg/L Highest in the ZIP: ROCKAWAY TWP WATER DEPT · 14,000 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.6420 µg/L 32% of the EPA limit 2 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2017 | 2/3 | SYR4 |
| Beryllium, Total | 0.1110 µg/L 2.8% of the EPA limit 4 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2017 | 1/3 | SYR4 |
| Mercury | 0.0537 µg/L 2.7% of the EPA limit 2 µg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2017 | 2/3 | SYR4 |
| PFOA | 0.0120 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024
Highest in the ZIP: 0.0142 µg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2024 | 3/3 | UCMR-5 |
| PFOS | 0.0081 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024
Highest in the ZIP: 0.0094 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2025 | 3/3 | UCMR-5 |
| PFHXS | 0.0056 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024
Highest in the ZIP: 0.0071 µg/L — ROCKAWAY TWP WATER DEPT · 14,000 people · 2025 | 3/3 | UCMR-5 |
| Pfpea | 0.0068 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024 | 3/3 | UCMR-5 |
| PFBS | 0.0036 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024
Highest in the ZIP: 0.0066 µg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2024 | 3/3 | UCMR-5 |
| Pfba | 0.0057 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024 | 2/3 | UCMR-5 |
| Pfhxa | 0.0052 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024
Highest in the ZIP: 0.0054 µg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2024 | 3/3 | UCMR-5 |
| Lead | 0.0028 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024
Highest in the ZIP: 0.0041 mg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2026 | 3/3 | LCR |
| Pfhpa | 0.0032 µg/L No EPA limit set Main supplier: DOVER WATER COMMISSION · 27,806 people · 2024
Highest in the ZIP: 0.0037 µg/L — ROCKAWAY BORO WATER DEPT · 7,066 people · 2024 | 2/3 | 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 07866
| Supplier | State | Population served |
|---|---|---|
| DOVER WATER COMMISSION | NJ | 27,806 |
| ROCKAWAY TWP WATER DEPT | NJ | 14,000 |
| ROCKAWAY BORO WATER DEPT | NJ | 7,066 |
Frequently asked questions about ZIP 07866 tap water
Is the tap water in ZIP 07866 safe to drink?
EPA testing detected 35 contaminants across the water suppliers serving ZIP 07866. 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 07866?
3 public water suppliers report EPA drinking-water monitoring for ZIP 07866. Each is listed above with its population served.
What contaminants are in ZIP 07866's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Barium, Fluoride, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.