What was found in ZIP 01863
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 | 930 µg/L 9.3% of the EPA limit 10000 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Fluoride | 500 µg/L 13% of the EPA limit 4000 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2018 | 1/1 | SYR4 |
| Chlorite | 445 µg/L 45% of the EPA limit 1000 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Copper | 90 µg/L 6.9% of the EPA limit 1300 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| TTHM | 65.16 µg/L 81% of the EPA limit 80 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Barium | 37.85 µg/L 1.9% of the EPA limit 2000 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2018 | 1/1 | SYR4 |
| Lithium | 30.8 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2024 | 1/1 | UCMR-5 |
| Chloroform | 24 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 21.825 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 21.34 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 17.355 µg/L 58% of the EPA limit 30 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Bromoform | 13.568 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.765 µg/L 18% of the EPA limit 60 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 7.0475 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 4.734 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 3.11 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 2.647 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2018 | 1/1 | SYR4 |
| Monochloroacetic Acid | 1.3655 µg/L No EPA limit set Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0035 mg/L 23% of the EPA limit 0.0150 mg/L Main supplier: NORTH CHELMSFORD WATER DIST · 7,660 people · 2025 | 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 01863
| Supplier | State | Population served |
|---|---|---|
| NORTH CHELMSFORD WATER DIST | MA | 7,660 |
Frequently asked questions about ZIP 01863 tap water
Is the tap water in ZIP 01863 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 01863. 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 01863?
1 public water supplier report EPA drinking-water monitoring for ZIP 01863. Each is listed above with its population served.
What contaminants are in ZIP 01863's water?
EPA monitoring detected Nitrate, Fluoride, Chlorite, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.