What was found in ZIP 01824
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 | 1600 µg/L 16% of the EPA limit 10000 µg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2019 | 2/2 | SYR4 |
| Copper | 161.5 µg/L 12% of the EPA limit 1300 µg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2019 | 1/2 | SYR4 |
| TTHM | 79.81 µg/L 100% of the EPA limit 80 µg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 45 pCi/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2017 | 1/2 | SYR4 |
| Chloroform | 44.95 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Barium | 43.6 µg/L 2.2% of the EPA limit 2000 µg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2018 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 23.19 µg/L 39% of the EPA limit 60 µg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2019
Highest in the ZIP: 26.3 µg/L — EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 21 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 15.1 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 15 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 11.3 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 7.02 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Arsenic | 4.6 µg/L 46% of the EPA limit 10 µg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2018 | 2/2 | SYR4 |
| Dibromoacetic Acid | 4.545 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Bromoform | 3.96 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.555 µg/L No EPA limit set Highest in the ZIP: EAST CHELMSFORD WATER DISTRICT · 2,800 people · 2019 | 1/2 | SYR4 |
| Dichloromethane | 2.21 µg/L 44% of the EPA limit 5 µg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2019 | 2/2 | SYR4 |
| PFOA | 0.0089 µg/L No EPA limit set Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2024 | 1/2 | UCMR-5 |
| PFOS | 0.0072 µg/L No EPA limit set Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2024 | 1/2 | UCMR-5 |
| PFBS | 0.0042 µg/L No EPA limit set Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0037 µg/L No EPA limit set Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2024 | 1/2 | UCMR-5 |
| Pfhxa | 0.0035 µg/L No EPA limit set Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: CHELMSFORD WATER DISTRICT · 28,750 people · 2025 | 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 01824
| Supplier | State | Population served |
|---|---|---|
| CHELMSFORD WATER DISTRICT | MA | 28,750 |
| EAST CHELMSFORD WATER DISTRICT | MA | 2,800 |
Frequently asked questions about ZIP 01824 tap water
Is the tap water in ZIP 01824 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 01824. 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 01824?
2 public water suppliers report EPA drinking-water monitoring for ZIP 01824. Each is listed above with its population served.
What contaminants are in ZIP 01824's water?
EPA monitoring detected Nitrate, Copper, TTHM, Gross Beta Particle Activity, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.