What was found in ZIP 02631
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 | 2200 µg/L 22% of the EPA limit 10000 µg/L Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2019 | 2/2 | SYR4 |
| Fluoride | 550 µg/L 14% of the EPA limit 4000 µg/L Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2018 | 1/2 | SYR4 |
| Copper | 72.5 µg/L 5.6% of the EPA limit 1300 µg/L Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Barium | 46 µg/L 2.3% of the EPA limit 2000 µg/L Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2018 | 2/2 | SYR4 |
| TTHM | 13 µg/L 16% of the EPA limit 80 µg/L Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2019
Highest in the ZIP: 19.85 µg/L — BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 2/2 | SYR4 |
| Bromoform | 6 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 5.825 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Chloroform | 5.525 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.1 µg/L 6.8% of the EPA limit 60 µg/L Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2019
Highest in the ZIP: 4.88 µg/L — BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 4.8 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 3.04 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 2.28 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.92 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 1.8 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Tetrachloroethylene | 1.52 µg/L 30% of the EPA limit 5 µg/L Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 0.9835 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 0.9225 µg/L No EPA limit set Highest in the ZIP: BREWSTER WATER DEPARTMENT · 35,000 people · 2019 | 1/2 | SYR4 |
| Pfhxa | 0.0056 µg/L No EPA limit set Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0051 µg/L No EPA limit set Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: DENNIS WATER DISTRICT · 65,000 people · 2023
Highest in the ZIP: 0.0034 mg/L — BREWSTER WATER DEPARTMENT · 35,000 people · 2023 | 2/2 | 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 02631
| Supplier | State | Population served |
|---|---|---|
| DENNIS WATER DISTRICT | MA | 65,000 |
| BREWSTER WATER DEPARTMENT | MA | 35,000 |
Frequently asked questions about ZIP 02631 tap water
Is the tap water in ZIP 02631 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 02631. 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 02631?
2 public water suppliers report EPA drinking-water monitoring for ZIP 02631. Each is listed above with its population served.
What contaminants are in ZIP 02631'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.