What was found in ZIP 03103
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 | 678.5 µg/L 17% of the EPA limit 4000 µg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019 | 1/3 | SYR4 |
| Nitrate | 220 µg/L 2.2% of the EPA limit 10000 µg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019 | 1/3 | SYR4 |
| Copper | 46.45 µg/L 3.6% of the EPA limit 1300 µg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019
Highest in the ZIP: 108 µg/L — LONDONDERRY · 6,255 people · 2018 | 3/3 | SYR4 |
| Lead | 36.7 µg/L 245% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019 | 3/3 | SYR4 |
| Barium | 16.3428 µg/L 0.8% of the EPA limit 2000 µg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.445 µg/L 19% of the EPA limit 60 µg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019
Highest in the ZIP: 14.7 µg/L — LONDONDERRY · 6,255 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 13.92 µg/L No EPA limit set Highest in the ZIP: LONDONDERRY · 6,255 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 8.085 µg/L No EPA limit set Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019
Highest in the ZIP: 8.44 µg/L — LONDONDERRY · 6,255 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 6.8 µg/L No EPA limit set Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019
Highest in the ZIP: 7.965 µg/L — LONDONDERRY · 6,255 people · 2019 | 3/3 | SYR4 |
| TTHM | 6.07 µg/L 7.6% of the EPA limit 80 µg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019
Highest in the ZIP: 6.7 µg/L — LONDONDERRY · 6,255 people · 2019 | 3/3 | SYR4 |
| Chloroform | 3.735 µg/L No EPA limit set Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019
Highest in the ZIP: 4.2 µg/L — LONDONDERRY · 6,255 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 1.8 µg/L No EPA limit set Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 1.7 pCi/L No EPA limit set Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2017 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.53 pCi/L 31% of the EPA limit 5 pCi/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2017 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.4 µg/L No EPA limit set Highest in the ZIP: LONDONDERRY · 6,255 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 0.9700 µg/L No EPA limit set Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2019
Highest in the ZIP: 1 µg/L — LITTLE POND ESTATES · 3,000 people · 2019 | 3/3 | SYR4 |
| PFOA | 0.0050 µg/L No EPA limit set Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2023
Highest in the ZIP: 0.0064 µg/L — LONDONDERRY · 6,255 people · 2024 | 3/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: MANCHESTER WATER WORKS · 123,500 people · 2024 | 2/3 | 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 03103
| Supplier | State | Population served |
|---|---|---|
| MANCHESTER WATER WORKS | NH | 123,500 |
| LONDONDERRY | NH | 6,255 |
| LITTLE POND ESTATES | NH | 3,000 |
Frequently asked questions about ZIP 03103 tap water
Is the tap water in ZIP 03103 safe to drink?
EPA testing detected 18 contaminants across the water suppliers serving ZIP 03103. 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 03103?
3 public water suppliers report EPA drinking-water monitoring for ZIP 03103. Each is listed above with its population served.
What contaminants are in ZIP 03103's water?
EPA monitoring detected Fluoride, Nitrate, Copper, Lead, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.