What was found in ZIP 06787
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 | 71 µg/L 0.7% of the EPA limit 10000 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 1120 µg/L — CTWC - NAUGATUCK REG-THOMASTON SYSTEM · 3,789 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 69.5 µg/L 0.7% of the EPA limit 10000 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 990.5 µg/L — CTWC - NAUGATUCK REG-THOMASTON SYSTEM · 3,789 people · 2019 | 3/3 | SYR4 |
| Fluoride | 909 µg/L 23% of the EPA limit 4000 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 2/3 | SYR4 |
| Copper | 237.5 µg/L 18% of the EPA limit 1300 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 569 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 3/3 | SYR4 |
| TTHM | 83.62 µg/L 105% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 3/3 | SYR4 |
| Barium | 11.45 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 80.6 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 3/3 | SYR4 |
| Chloroform | 34.475 µg/L No EPA limit set Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 62.5 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 54.69 µg/L 91% of the EPA limit 60 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 3/3 | SYR4 |
| Cyanide | 50 µg/L 25% of the EPA limit 200 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Lead | 15.6 µg/L 104% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 30.6 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 3/3 | SYR4 |
| 1,2,4-Trichlorobenzene | 24.4 µg/L 35% of the EPA limit 70 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Trichloroacetic Acid | 18.05 µg/L No EPA limit set Highest in the ZIP: AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 1/3 | SYR4 |
| Nitrite | 16.4 µg/L 1.6% of the EPA limit 1000 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 14 µg/L No EPA limit set Highest in the ZIP: AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 5.62 µg/L No EPA limit set Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 9 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 1.49 µg/L 5% of the EPA limit 30 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 7.24 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 3.42 pCi/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 0.7750 µg/L No EPA limit set Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 3 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.27 pCi/L 45% of the EPA limit 5 pCi/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2015 | 2/3 | SYR4 |
| Toxaphene | 2.2 µg/L 73% of the EPA limit 3 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.3000 µg/L 6% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 1.95 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 1.8 µg/L No EPA limit set Highest in the ZIP: AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.3 µg/L 22% of the EPA limit 6 µg/L Highest in the ZIP: CTWC - NAUGATUCK REG-THOMASTON SYSTEM · 3,789 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.18 µg/L No EPA limit set Highest in the ZIP: CTWC - NAUGATUCK REG-THOMASTON SYSTEM · 3,789 people · 2019 | 2/3 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Bromoform | 0.5000 µg/L No EPA limit set Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019
Highest in the ZIP: 1 µg/L — AQUARION-LITCHFIELD REGIONAL · 3,097 people · 2019 | 3/3 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 1 µg/L 50% of the EPA limit 2 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 0.8000 µg/L 13% of the EPA limit 6 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| 1,1,1-Trichloroethane | 0.5000 µg/L 0.3% of the EPA limit 200 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| 1,1,2-Trichloroethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| 1,1-Dichloroethylene | 0.5000 µg/L 7.1% of the EPA limit 7 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| 1,2-Dichloroethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| 1,2-Dichloropropane | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Benzene | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Chlorobenzene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Carbon Tetrachloride | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Dichloromethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 0.5000 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Styrene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Tetrachloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Toluene | 0.5000 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Vinyl Chloride | 0.5000 µg/L 25% of the EPA limit 2 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| cis-1,2-Dichloroethylene | 0.5000 µg/L 0.7% of the EPA limit 70 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| O-Dichlorobenzene | 0.5000 µg/L 0.1% of the EPA limit 600 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| P-Dichlorobenzene | 0.5000 µg/L 0.7% of the EPA limit 75 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| trans-1,2-Dichloroethylene | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| 2,4,5-TP | 0.4400 µg/L 0.9% of the EPA limit 50 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Beryllium, Total | 0.3000 µg/L 7.5% of the EPA limit 4 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.2200 µg/L 0.3% of the EPA limit 70 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Methoxychlor | 0.2200 µg/L 0.5% of the EPA limit 40 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Asbestos | 0.1700 MFL 2.4% of the EPA limit 7 MFL Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Bhc-Gamma | 0.0440 µg/L 22% of the EPA limit 0.2000 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Endrin | 0.0220 µg/L 1.1% of the EPA limit 2 µg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L Main supplier: WATERBURY WATER DEPARTMENT · 107,271 people · 2025 | 3/3 | 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 06787
| Supplier | State | Population served |
|---|---|---|
| WATERBURY WATER DEPARTMENT | CT | 107,271 |
| CTWC - NAUGATUCK REG-THOMASTON SYSTEM | CT | 3,789 |
| AQUARION-LITCHFIELD REGIONAL | CT | 3,097 |
Frequently asked questions about ZIP 06787 tap water
Is the tap water in ZIP 06787 safe to drink?
EPA testing detected 58 contaminants across the water suppliers serving ZIP 06787. 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 06787?
3 public water suppliers report EPA drinking-water monitoring for ZIP 06787. Each is listed above with its population served.
What contaminants are in ZIP 06787's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.