What was found in ZIP 01887
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 | 1192.5 µg/L 12% of the EPA limit 10000 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Fluoride | 1175 µg/L 29% of the EPA limit 4000 µg/L Highest in the ZIP: NORTH READING WATER DEPT. · 16,379 people · 2018 | 1/2 | SYR4 |
| Nitrite | 330.5 µg/L 33% of the EPA limit 1000 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 1/2 | SYR4 |
| TTHM | 86.385 µg/L 108% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019
Highest in the ZIP: 91.945 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2019 | 2/2 | SYR4 |
| Chloroform | 59.7 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019
Highest in the ZIP: 80.335 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 46.6 µg/L 78% of the EPA limit 60 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Arsenic | 44.455 µg/L 445% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Barium | 36 µg/L 1.8% of the EPA limit 2000 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 32.5 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 24.7 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 21.4 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 10.89 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019
Highest in the ZIP: 13.98 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.25 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 3.52 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 1/2 | SYR4 |
| Bromoform | 1.731 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019
Highest in the ZIP: 1.9275 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2019 | 2/2 | SYR4 |
| Chromium | 1.54 µg/L 1.5% of the EPA limit 100 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.1275 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9130 µg/L 15% of the EPA limit 6 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 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 |
| cis-1,2-Dichloroethylene | 0.6400 µg/L 0.9% of the EPA limit 70 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 1/2 | SYR4 |
| Vinyl Chloride | 0.6140 µg/L 31% of the EPA limit 2 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 1/2 | SYR4 |
| Styrene | 0.5600 µg/L 0.6% of the EPA limit 100 µg/L Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0088 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2025 | 2/2 | UCMR-5 |
| Pfpea | 0.0030 µg/L No EPA limit set Main supplier: WILMINGTON WATER DEPT · 21,654 people · 2025
Highest in the ZIP: 0.0040 µg/L — NORTH READING WATER DEPT. · 16,379 people · 2024 | 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 | 0.0018 mg/L 12% of the EPA limit 0.0150 mg/L Main supplier: WILMINGTON WATER DEPT · 21,654 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 01887
| Supplier | State | Population served |
|---|---|---|
| WILMINGTON WATER DEPT | MA | 21,654 |
| NORTH READING WATER DEPT. | MA | 16,379 |
Frequently asked questions about ZIP 01887 tap water
Is the tap water in ZIP 01887 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 01887. 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 01887?
2 public water suppliers report EPA drinking-water monitoring for ZIP 01887. Each is listed above with its population served.
What contaminants are in ZIP 01887's water?
EPA monitoring detected Nitrate, Fluoride, Nitrite, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.