What was found in ZIP 02601
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 | 5000 µg/L 50% of the EPA limit 10000 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Copper | 591.05 µg/L 45% of the EPA limit 1300 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Barium | 93.8 µg/L 4.7% of the EPA limit 2000 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Fluoride | 80 µg/L 2% of the EPA limit 4000 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| TTHM | 13.24 µg/L 17% of the EPA limit 80 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019
Highest in the ZIP: 18 µg/L — BARNSTABLE FIRE DISTRICT · 5,400 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 5.345 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019
Highest in the ZIP: 6.6 µg/L — BARNSTABLE FIRE DISTRICT · 5,400 people · 2019 | 2/2 | SYR4 |
| Bromoform | 2.35 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019
Highest in the ZIP: 5.57 µg/L — BARNSTABLE FIRE DISTRICT · 5,400 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 4.725 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.62 µg/L 7.7% of the EPA limit 60 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.06 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| Selenium | 4 µg/L 8% of the EPA limit 50 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| Chloroform | 3.9 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 3.9 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Arsenic | 3.55 µg/L 36% of the EPA limit 10 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 2.35 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Tetrachloroethylene | 2.2 µg/L 44% of the EPA limit 5 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 2.151 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| cis-1,2-Dichloroethylene | 2 µg/L 2.9% of the EPA limit 70 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 1.78 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 2/2 | SYR4 |
| Trichloroethylene | 0.6500 µg/L 13% of the EPA limit 5 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| Cadmium | 0.2085 µg/L 4.2% of the EPA limit 5 µg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2019 | 1/2 | SYR4 |
| Pfpea | 0.0298 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2024 | 2/2 | UCMR-5 |
| PFBS | 0.0182 µg/L No EPA limit set Highest in the ZIP: BARNSTABLE FIRE DISTRICT · 5,400 people · 2023 | 1/2 | UCMR-5 |
| Pfba | 0.0168 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2024 | 1/2 | UCMR-5 |
| PFOS | 0.0071 µg/L No EPA limit set Highest in the ZIP: BARNSTABLE FIRE DISTRICT · 5,400 people · 2023 | 1/2 | UCMR-5 |
| Pfhxa | 0.0065 µg/L No EPA limit set Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2024 | 2/2 | UCMR-5 |
| PFOA | 0.0044 µg/L No EPA limit set Highest in the ZIP: BARNSTABLE FIRE DISTRICT · 5,400 people · 2023 | 1/2 | UCMR-5 |
| PFHXS | 0.0036 µg/L No EPA limit set Highest in the ZIP: BARNSTABLE FIRE DISTRICT · 5,400 people · 2023 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE · 35,000 people · 2025
Highest in the ZIP: 0.0014 mg/L — BARNSTABLE FIRE DISTRICT · 5,400 people · 2026 | 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 02601
| Supplier | State | Population served |
|---|---|---|
| HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE | MA | 35,000 |
| BARNSTABLE FIRE DISTRICT | MA | 5,400 |
Frequently asked questions about ZIP 02601 tap water
Is the tap water in ZIP 02601 safe to drink?
EPA testing detected 29 contaminants across the water suppliers serving ZIP 02601. 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 02601?
2 public water suppliers report EPA drinking-water monitoring for ZIP 02601. Each is listed above with its population served.
What contaminants are in ZIP 02601's water?
EPA monitoring detected Nitrate, Copper, Barium, Fluoride, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.