What was found in ZIP 06001
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 | 3330 µg/L 33% of the EPA limit 10000 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 3800 µg/L — AVON WATER CO · 11,590 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 2838 µg/L 28% of the EPA limit 10000 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 3780 µg/L — AVON WATER CO · 11,590 people · 2019 | 3/3 | SYR4 |
| Barium | 310.2 µg/L 16% of the EPA limit 2000 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 1050.72 µg/L — AVON WATER CO · 11,590 people · 2018 | 3/3 | SYR4 |
| Copper | 965.75 µg/L 74% of the EPA limit 1300 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Fluoride | 50 µg/L 1.3% of the EPA limit 4000 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 182.15 µg/L — CTWC - NAUGATUCK REG-COLLINSVILLE SYS · 6,324 people · 2019 | 2/3 | SYR4 |
| TTHM | 57.54 µg/L 72% of the EPA limit 80 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Chloroform | 52 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40 µg/L 67% of the EPA limit 60 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 25.05 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Lead | 12.3 µg/L 82% of the EPA limit 15 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 18.6 µg/L — AVON WATER CO · 11,590 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 16 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 7.015 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 5.55 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 3.555 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 5.2 µg/L — AVON WATER CO · 11,590 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.2 pCi/L 28% of the EPA limit 15 pCi/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 2/3 | SYR4 |
| Arsenic | 3.2 µg/L 32% of the EPA limit 10 µg/L Highest in the ZIP: AVON WATER CO · 11,590 people · 2018 | 1/3 | SYR4 |
| Bromoform | 1.25 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 2.98 µg/L — AVON WATER CO · 11,590 people · 2019 | 2/3 | SYR4 |
| Tetrachloroethylene | 2.615 µg/L 52% of the EPA limit 5 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.995 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019
Highest in the ZIP: 2.43 µg/L — AVON WATER CO · 11,590 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 2.18 µg/L 7.3% of the EPA limit 30 µg/L Highest in the ZIP: AVON WATER CO · 11,590 people · 2018 | 1/3 | SYR4 |
| Chromium | 1.92 µg/L 1.9% of the EPA limit 100 µg/L Highest in the ZIP: AVON WATER CO · 11,590 people · 2018 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.6 pCi/L 32% of the EPA limit 5 pCi/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 3/3 | SYR4 |
| cis-1,2-Dichloroethylene | 1.395 µg/L 2% of the EPA limit 70 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 1/3 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 0.7260 µg/L No EPA limit set Highest in the ZIP: AVON WATER CO · 11,590 people · 2019 | 1/3 | SYR4 |
| 1,1,1-Trichloroethane | 0.6200 µg/L 0.3% of the EPA limit 200 µg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2019 | 1/3 | SYR4 |
| Chlordane | 0.2940 µg/L 15% of the EPA limit 2 µg/L Highest in the ZIP: AVON WATER CO · 11,590 people · 2019 | 1/3 | SYR4 |
| PFOS | 0.0060 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2023
Highest in the ZIP: 0.0080 µg/L — AVON WATER CO · 11,590 people · 2025 | 3/3 | UCMR-5 |
| Pfba | 0.0070 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2023 | 1/3 | UCMR-5 |
| PFOA | 0.0060 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2023
Highest in the ZIP: 0.0070 µg/L — AVON WATER CO · 11,590 people · 2025 | 3/3 | UCMR-5 |
| Pfhxa | 0.0040 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2023 | 2/3 | UCMR-5 |
| Pfpea | 0.0040 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2023 | 1/3 | UCMR-5 |
| PFBS | 0.0030 µg/L No EPA limit set Highest in the ZIP: AVON WATER CO · 11,590 people · 2025 | 1/3 | UCMR-5 |
| PFHXS | 0.0030 µg/L No EPA limit set Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: CTWC - UNIONVILLE SYSTEM · 14,693 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 06001
| Supplier | State | Population served |
|---|---|---|
| CTWC - UNIONVILLE SYSTEM | CT | 14,693 |
| AVON WATER CO | CT | 11,590 |
| CTWC - NAUGATUCK REG-COLLINSVILLE SYS | CT | 6,324 |
Frequently asked questions about ZIP 06001 tap water
Is the tap water in ZIP 06001 safe to drink?
EPA testing detected 35 contaminants across the water suppliers serving ZIP 06001. 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 06001?
3 public water suppliers report EPA drinking-water monitoring for ZIP 06001. Each is listed above with its population served.
What contaminants are in ZIP 06001's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Barium, Copper, Fluoride, and others across this ZIP's suppliers. The full list with levels and sources is above.