What was found in ZIP 01810
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 |
|---|---|---|---|
| Fluoride | 865 µg/L 22% of the EPA limit 4000 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
Highest in the ZIP: 1175 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2018 | 2/2 | SYR4 |
| Nitrate | 290 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
Highest in the ZIP: 1051.5 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2018 | 2/2 | SYR4 |
| TTHM | 51.62 µg/L 65% of the EPA limit 80 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
Highest in the ZIP: 91.945 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2019 | 2/2 | SYR4 |
| Chloroform | 80.335 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2019 | 1/2 | SYR4 |
| Barium | 16.7 µg/L 0.8% of the EPA limit 2000 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
Highest in the ZIP: 31.8 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2018 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.1715 µg/L 15% of the EPA limit 60 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019
Highest in the ZIP: 22.665 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 21.86 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 13.98 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 8.142 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 5.702 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2019 | 1/2 | SYR4 |
| Bromate | 2.38 µg/L 24% of the EPA limit 10 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019 | 1/2 | SYR4 |
| Bromoform | 1.9275 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2019 | 1/2 | SYR4 |
| Copper | 1.885 µg/L 0.1% of the EPA limit 1300 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2017 | 1/2 | SYR4 |
| Monochloroacetic Acid | 1.717 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2018 | 1/2 | SYR4 |
| Carbofuran | 0.9000 µg/L 2.3% of the EPA limit 40 µg/L Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2016 | 1/2 | SYR4 |
| Toluene | 0.8200 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2018 | 1/2 | SYR4 |
| 1,2-Dichloroethane | 0.7000 µg/L 14% of the EPA limit 5 µg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0060 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0040 µg/L No EPA limit set Main supplier: ANDOVER WATER DEPT · 36,569 people · 2025 | 2/2 | UCMR-5 |
| Pfhxa | 0.0030 µg/L No EPA limit set Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ANDOVER WATER DEPT · 36,569 people · 2025
Highest in the ZIP: 0.0017 mg/L — NORTH READING WATER DEPT. · 16,379 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 01810
| Supplier | State | Population served |
|---|---|---|
| ANDOVER WATER DEPT | MA | 36,569 |
| NORTH READING WATER DEPT. | MA | 16,379 |
Frequently asked questions about ZIP 01810 tap water
Is the tap water in ZIP 01810 safe to drink?
EPA testing detected 22 contaminants across the water suppliers serving ZIP 01810. 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 01810?
2 public water suppliers report EPA drinking-water monitoring for ZIP 01810. Each is listed above with its population served.
What contaminants are in ZIP 01810's water?
EPA monitoring detected Fluoride, Nitrate, TTHM, Chloroform, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.