What was found in ZIP 02043
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 | 4990 µg/L 50% of the EPA limit 10000 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019 | 2/3 | SYR4 |
| Fluoride | 1000 µg/L 25% of the EPA limit 4000 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 1083 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Copper | 553 µg/L 43% of the EPA limit 1300 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2016 | 2/3 | SYR4 |
| Nitrite | 182.5 µg/L 18% of the EPA limit 1000 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019 | 1/3 | SYR4 |
| TTHM | 88 µg/L 110% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 100 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Barium | 94.6 µg/L 4.7% of the EPA limit 2000 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019 | 2/3 | SYR4 |
| Chloroform | 46 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 72 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 50.7 µg/L 85% of the EPA limit 60 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 26.37 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 28 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 21 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 25 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 16.9 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 19 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 8.185 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 9.5 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Lead | 8.4 µg/L 56% of the EPA limit 15 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2016 | 1/3 | SYR4 |
| Chromium | 5.3 µg/L 5.3% of the EPA limit 100 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 6 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 4.6285 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 5.375 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 4.61 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019 | 2/3 | SYR4 |
| Bromoform | 1.04 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 3.07 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 1.9 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2019
Highest in the ZIP: 2.75 µg/L — COHASSET WATER DEPT · 7,555 people · 2019 | 2/3 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L Highest in the ZIP: COHASSET WATER DEPT · 7,555 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 1.4 µg/L 4.7% of the EPA limit 30 µg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2014 | 1/3 | SYR4 |
| Pentachlorophenol | 0.1000 µg/L 10% of the EPA limit 1 µg/L Highest in the ZIP: COHASSET WATER DEPT · 7,555 people · 2018 | 1/3 | SYR4 |
| Pfba | 0.0057 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2025
Highest in the ZIP: 0.0073 µg/L — COHASSET WATER DEPT · 7,555 people · 2025 | 2/3 | UCMR-5 |
| PFOA | 0.0064 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2025
Highest in the ZIP: 0.0067 µg/L — COHASSET WATER DEPT · 7,555 people · 2025 | 2/3 | UCMR-5 |
| Pfhxa | 0.0060 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2025 | 2/3 | UCMR-5 |
| Pfpea | 0.0043 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2025
Highest in the ZIP: 0.0046 µg/L — COHASSET WATER DEPT · 7,555 people · 2025 | 2/3 | UCMR-5 |
| PFOS | 0.0045 µg/L No EPA limit set Highest in the ZIP: COHASSET WATER DEPT · 7,555 people · 2025 | 1/3 | UCMR-5 |
| PFBS | 0.0033 µg/L No EPA limit set Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: WEIR RIVER WATER SYSTEM · 45,339 people · 2025
Highest in the ZIP: 0.0020 mg/L — COHASSET WATER DEPT · 7,555 people · 2025 | 3/3 | LCR |
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 02043
| Supplier | State | Population served |
|---|---|---|
| WEIR RIVER WATER SYSTEM | MA | 45,339 |
| COHASSET WATER DEPT | MA | 7,555 |
| LINDEN PONDS | MA | 384 |
Frequently asked questions about ZIP 02043 tap water
Is the tap water in ZIP 02043 safe to drink?
EPA testing detected 28 contaminants across the water suppliers serving ZIP 02043. 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 02043?
3 public water suppliers report EPA drinking-water monitoring for ZIP 02043. Each is listed above with its population served.
What contaminants are in ZIP 02043's water?
EPA monitoring detected Nitrate, Fluoride, Copper, Nitrite, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.