What was found in ZIP 02481
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 | 1447 µg/L 14% of the EPA limit 10000 µg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019
Highest in the ZIP: 2800 µg/L — WELLESLEY COLLEGE · 3,000 people · 2019 | 2/2 | SYR4 |
| Fluoride | 972.5 µg/L 24% of the EPA limit 4000 µg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2017 | 1/2 | SYR4 |
| Barium | 77.425 µg/L 3.9% of the EPA limit 2000 µg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2017
Highest in the ZIP: 159.49 µg/L — WELLESLEY COLLEGE · 3,000 people · 2016 | 2/2 | SYR4 |
| Copper | 105 µg/L 8.1% of the EPA limit 1300 µg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2012 | 1/2 | SYR4 |
| TTHM | 47.44 µg/L 59% of the EPA limit 80 µg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14.19 µg/L 24% of the EPA limit 60 µg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019
Highest in the ZIP: 24 µg/L — WELLESLEY COLLEGE · 3,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 16.84 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 16.6 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Chloroform | 13.16 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Cyanide | 8 µg/L 4% of the EPA limit 200 µg/L Highest in the ZIP: WELLESLEY COLLEGE · 3,000 people · 2016 | 1/2 | SYR4 |
| Dichloroacetic Acid | 7.085 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 5.045 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 4.78 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Bromoform | 4.275 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 4.18 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 2.905 µg/L 48% of the EPA limit 6 µg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2017 | 1/2 | SYR4 |
| Monochloroacetic Acid | 2.19 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2019 | 1/2 | SYR4 |
| Chromium | 1.4925 µg/L 1.5% of the EPA limit 100 µg/L Highest in the ZIP: WELLESLEY COLLEGE · 3,000 people · 2016 | 1/2 | SYR4 |
| PFOS | 0.0066 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2025 | 1/2 | UCMR-5 |
| PFOA | 0.0063 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0053 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2025 | 1/2 | UCMR-5 |
| Pfba | 0.0052 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0035 mg/L 23% of the EPA limit 0.0150 mg/L Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2025
Highest in the ZIP: 0.0043 mg/L — WELLESLEY COLLEGE · 3,000 people · 2026 | 2/2 | LCR |
| Pfpea | 0.0043 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0039 µg/L No EPA limit set Main supplier: WELLESLEY WATER DIVISION · 29,550 people · 2025 | 1/2 | 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 02481
| Supplier | State | Population served |
|---|---|---|
| WELLESLEY WATER DIVISION | MA | 29,550 |
| WELLESLEY COLLEGE | MA | 3,000 |
Frequently asked questions about ZIP 02481 tap water
Is the tap water in ZIP 02481 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 02481. 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 02481?
2 public water suppliers report EPA drinking-water monitoring for ZIP 02481. Each is listed above with its population served.
What contaminants are in ZIP 02481's water?
EPA monitoring detected Nitrate, Fluoride, Barium, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.