What was found in ZIP 06340
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 | 1038 µg/L 26% of the EPA limit 4000 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Chlorite | 190 µg/L 19% of the EPA limit 1000 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Copper | 103 µg/L 7.9% of the EPA limit 1300 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 93 µg/L 0.9% of the EPA limit 10000 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| TTHM | 88.86 µg/L 111% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Nitrate | 88 µg/L 0.9% of the EPA limit 10000 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Lead | 54.8 µg/L 365% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 36.31 µg/L 61% of the EPA limit 60 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Chloroform | 15.715 µg/L No EPA limit set Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Barium | 14.75 µg/L 0.7% of the EPA limit 2000 µg/L Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 7.615 µg/L No EPA limit set Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 1.965 µg/L No EPA limit set Main supplier: GROTON UTILITIES · 30,200 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: GROTON UTILITIES · 30,200 people · 2025 | 1/1 | 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 06340
| Supplier | State | Population served |
|---|---|---|
| GROTON UTILITIES | CT | 30,200 |
Frequently asked questions about ZIP 06340 tap water
Is the tap water in ZIP 06340 safe to drink?
EPA testing detected 13 contaminants across the water suppliers serving ZIP 06340. 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 06340?
1 public water supplier report EPA drinking-water monitoring for ZIP 06340. Each is listed above with its population served.
What contaminants are in ZIP 06340's water?
EPA monitoring detected Fluoride, Chlorite, Copper, Nitrate-Nitrite, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.