What was found in ZIP 01801
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 | 844.05 µg/L 21% of the EPA limit 4000 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 1100 µg/L — WINCHESTER WATER DEPT · 22,970 people · 2019 | 2/3 | SYR4 |
| Nitrate | 620 µg/L 6.2% of the EPA limit 10000 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| Copper | 59.0499999999999 µg/L 4.5% of the EPA limit 1300 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 288.4999999999998 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 2/3 | SYR4 |
| Nitrate-Nitrite | 140 µg/L 1.4% of the EPA limit 10000 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| TTHM | 64.13499999999999 µg/L 80% of the EPA limit 80 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 122.27499999999999 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Chloroform | 21.869999999999994 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 94.645 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 13.85 µg/L 23% of the EPA limit 60 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Barium | 38.89999999999998 µg/L 1.9% of the EPA limit 2000 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 50.8 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2013 | 3/3 | SYR4 |
| Trichloroacetic Acid | 3.4069999999999983 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 10.2 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 30.354999999999997 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 19.7 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 24.055 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 20.665 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 3/3 | SYR4 |
| Lead | 18.391999999999996 µg/L 123% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 1/3 | SYR4 |
| Bromoform | 8.657999999999996 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 3.205 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Nitrite | 6.4 µg/L 0.6% of the EPA limit 1000 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| Chromium | 5.704999999999995 µg/L 5.7% of the EPA limit 100 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 5.2135 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 3.6494999999999993 µg/L No EPA limit set Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Gross Beta Particle Activity | 2.0540000000000003 pCi/L No EPA limit set Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 2 µg/L 33% of the EPA limit 6 µg/L Highest in the ZIP: WINCHESTER WATER DEPT · 22,970 people · 2019 | 1/3 | SYR4 |
| Selenium | 1.6 µg/L 3.2% of the EPA limit 50 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| Arsenic | 1.5849999999999995 µg/L 16% of the EPA limit 10 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.095 pCi/L 22% of the EPA limit 5 pCi/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.9000 µg/L 1.3% of the EPA limit 70 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Tetrachloroethylene | 0.7000 µg/L 14% of the EPA limit 5 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.1240 µg/L 6.2% of the EPA limit 2 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.1100 µg/L 2.2% of the EPA limit 5 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.0370 µg/L 1.9% of the EPA limit 2 µg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2019 | 1/3 | SYR4 |
| PFOA | 0.0084 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2025 | 1/3 | UCMR-5 |
| Pfba | 0.0070 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2025 | 1/3 | UCMR-5 |
| PFOS | 0.0069 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0013 mg/L 8.5% of the EPA limit 0.0150 mg/L Main supplier: WOBURN WATER DEPT. · 40,876 people · 2025
Highest in the ZIP: 0.0042 mg/L — WINCHESTER WATER DEPT · 22,970 people · 2023 | 3/3 | LCR |
| PFBS | 0.0038 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2025 | 1/3 | UCMR-5 |
| Pfpea | 0.0038 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2025 | 1/3 | UCMR-5 |
| Pfhxa | 0.0037 µg/L No EPA limit set Main supplier: WOBURN WATER DEPT. · 40,876 people · 2025 | 1/3 | 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 01801
| Supplier | State | Population served |
|---|---|---|
| WOBURN WATER DEPT. | MA | 40,876 |
| WINCHESTER WATER DEPT | MA | 22,970 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
Frequently asked questions about ZIP 01801 tap water
Is the tap water in ZIP 01801 safe to drink?
EPA testing detected 36 contaminants across the water suppliers serving ZIP 01801. 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 01801?
3 public water suppliers report EPA drinking-water monitoring for ZIP 01801. Each is listed above with its population served.
What contaminants are in ZIP 01801's water?
EPA monitoring detected Fluoride, Nitrate, Copper, Nitrate-Nitrite, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.