What was found in ZIP 01720
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 | 4660 µg/L 47% of the EPA limit 10000 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019 | 5/5 | SYR4 |
| Fluoride | 1025 µg/L 26% of the EPA limit 4000 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2018
Highest in the ZIP: 1100 µg/L — CONCORD WATER DEPT · 18,788 people · 2019 | 4/5 | SYR4 |
| Copper | 126.75 µg/L 9.8% of the EPA limit 1300 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 151.35 µg/L — PINE HILL CONDOMINIUM · 95 people · 2019 | 5/5 | SYR4 |
| TTHM | 82.345 µg/L 103% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 97.15 µg/L — MAYNARD DPW, WATER DIVISION · 10,616 people · 2019 | 4/5 | SYR4 |
| Barium | 79.25 µg/L 4% of the EPA limit 2000 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2018
Highest in the ZIP: 92 µg/L — PINE HILL CONDOMINIUM · 95 people · 2013 | 5/5 | SYR4 |
| Chloroform | 56.6 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 73.85 µg/L — MAYNARD DPW, WATER DIVISION · 10,616 people · 2019 | 4/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 12.655 µg/L 21% of the EPA limit 60 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 62 µg/L — MAYNARD DPW, WATER DIVISION · 10,616 people · 2019 | 4/5 | SYR4 |
| Trichloroacetic Acid | 9.66 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 45 µg/L — MAYNARD DPW, WATER DIVISION · 10,616 people · 2019 | 3/5 | SYR4 |
| Arsenic | 31 µg/L 310% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019 | 3/5 | SYR4 |
| Combined Uranium | 20.595 µg/L 69% of the EPA limit 30 µg/L Highest in the ZIP: PINE HILL CONDOMINIUM · 95 people · 2019 | 1/5 | SYR4 |
| Bromodichloromethane | 19.505 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019 | 4/5 | SYR4 |
| Dichloroacetic Acid | 4.4255 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 17 µg/L — MAYNARD DPW, WATER DIVISION · 10,616 people · 2019 | 4/5 | SYR4 |
| Dibromochloromethane | 11.78 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019 | 4/5 | SYR4 |
| Bromate | 11.4 µg/L 114% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the ZIP: CONCORD WATER DEPT · 18,788 people · 2019 | 2/5 | SYR4 |
| 1,1-Dichloroethylene | 7.17 µg/L 102% of the EPA limit, at the 95th percentile of samples — 7 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019 | 1/5 | SYR4 |
| Bromoform | 4.08 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 6.452 µg/L — CONCORD WATER DEPT · 18,788 people · 2019 | 4/5 | SYR4 |
| Monobromoacetic Acid | 5.376 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019 | 4/5 | SYR4 |
| Monochloroacetic Acid | 3.45 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 4.25 µg/L — CONCORD WATER DEPT · 18,788 people · 2019 | 3/5 | SYR4 |
| Dibromoacetic Acid | 2.329 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2019
Highest in the ZIP: 4.11 µg/L — CONCORD WATER DEPT · 18,788 people · 2019 | 4/5 | SYR4 |
| Chromium | 1.8 µg/L 1.8% of the EPA limit 100 µg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2018 | 1/5 | SYR4 |
| Tetrachloroethylene | 0.9400 µg/L 19% of the EPA limit 5 µg/L Highest in the ZIP: LITTLETON WATER DEPARTMENT · 9,307 people · 2019 | 1/5 | SYR4 |
| Chlorobenzene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L Highest in the ZIP: MAYNARD DPW, WATER DIVISION · 10,616 people · 2019 | 1/5 | SYR4 |
| Pfba | 0.0206 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024 | 1/5 | UCMR-5 |
| PFOA | 0.0134 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024 | 3/5 | UCMR-5 |
| PFBS | 0.0037 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024
Highest in the ZIP: 0.0094 µg/L — CONCORD WATER DEPT · 18,788 people · 2024 | 3/5 | UCMR-5 |
| Pfpea | 0.0084 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024 | 3/5 | UCMR-5 |
| Pfhxa | 0.0071 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024 | 3/5 | UCMR-5 |
| Pfhpa | 0.0052 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024 | 1/5 | UCMR-5 |
| Lead | 0.0036 mg/L 24% of the EPA limit 0.0150 mg/L Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2025
Highest in the ZIP: 0.0051 mg/L — CONCORD WATER DEPT · 18,788 people · 2023 | 5/5 | LCR |
| PFOS | 0.0049 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024 | 2/5 | UCMR-5 |
| PFHXS | 0.0032 µg/L No EPA limit set Main supplier: ACTON WATER SUPPLY DISTRICT · 21,285 people · 2024 | 1/5 | 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 01720
| Supplier | State | Population served |
|---|---|---|
| ACTON WATER SUPPLY DISTRICT | MA | 21,285 |
| CONCORD WATER DEPT | MA | 18,788 |
| MAYNARD DPW, WATER DIVISION | MA | 10,616 |
| LITTLETON WATER DEPARTMENT | MA | 9,307 |
| PINE HILL CONDOMINIUM | MA | 95 |
Frequently asked questions about ZIP 01720 tap water
Is the tap water in ZIP 01720 safe to drink?
EPA testing detected 31 contaminants across the water suppliers serving ZIP 01720. 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 01720?
5 public water suppliers report EPA drinking-water monitoring for ZIP 01720. Each is listed above with its population served.
What contaminants are in ZIP 01720's water?
EPA monitoring detected Nitrate, Fluoride, Copper, TTHM, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.