What was found in ZIP 02557
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 | 2053 µg/L 21% of the EPA limit 10000 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Fluoride | 985.5 µg/L 25% of the EPA limit 4000 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2018 | 1/1 | SYR4 |
| Copper | 51 µg/L 3.9% of the EPA limit 1300 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Barium | 35.9 µg/L 1.8% of the EPA limit 2000 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2018 | 1/1 | SYR4 |
| TTHM | 7.399 µg/L 9.2% of the EPA limit 80 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Bromoform | 2.509 µg/L No EPA limit set Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 2.484 µg/L No EPA limit set Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Chloroform | 1.9325 µg/L No EPA limit set Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.543 µg/L 2.6% of the EPA limit 60 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 1.48 µg/L No EPA limit set Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Tetrachloroethylene | 1.065 µg/L 21% of the EPA limit 5 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2019 | 1/1 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2018 | 1/1 | SYR4 |
| Pfhxa | 0.0040 µg/L No EPA limit set Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2023 | 1/1 | UCMR-5 |
| Pfpea | 0.0040 µg/L No EPA limit set Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2023 | 1/1 | UCMR-5 |
| Lead | 0.0039 mg/L 26% of the EPA limit 0.0150 mg/L Main supplier: OAK BLUFFS WATER DISTRICT · 24,000 people · 2023 | 1/1 | 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 02557
| Supplier | State | Population served |
|---|---|---|
| OAK BLUFFS WATER DISTRICT | MA | 24,000 |
Frequently asked questions about ZIP 02557 tap water
Is the tap water in ZIP 02557 safe to drink?
EPA testing detected 15 contaminants across the water suppliers serving ZIP 02557. 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 02557?
1 public water supplier report EPA drinking-water monitoring for ZIP 02557. Each is listed above with its population served.
What contaminants are in ZIP 02557's water?
EPA monitoring detected Nitrate, Fluoride, Copper, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.