What was found in Naugatuck's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 2200.5 µg/L 22% of the EPA limit 10000 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 2184 µg/L 22% of the EPA limit 10000 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 2/2 | SYR4 |
| Fluoride | 1063 µg/L 27% of the EPA limit 4000 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 2/2 | SYR4 |
| Copper | 123.3 µg/L 9.5% of the EPA limit 1300 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 2/2 | SYR4 |
| TTHM | 51.6 µg/L 65% of the EPA limit 80 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Chloroform | 40.35 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Barium | 29 µg/L 1.5% of the EPA limit 2000 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 22.03 µg/L 37% of the EPA limit 60 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Lead | 15.52 µg/L 103% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 13.225 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 11.15 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 10.65 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Nitrite | 7 µg/L 0.7% of the EPA limit 1000 µg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 6.8 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 5.65 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.081 pCi/L 34% of the EPA limit 15 pCi/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 3.2 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Bromoform | 3.1 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Highest in the city: IDLEVIEW MOBILE HOME PARK · 138 people · 2018 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Beryllium, Total | 1 µg/L 25% of the EPA limit 4 µg/L Highest in the city: IDLEVIEW MOBILE HOME PARK · 138 people · 2018 | 1/2 | SYR4 |
| Dibromoacetic Acid | 0.6000 µg/L No EPA limit set Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CTWC - NAUGATUCK REGION-CENTRAL SYSTEM · 22,735 people · 2026 | 2/2 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Naugatuck
| Supplier | Population served |
|---|---|
| CTWC - NAUGATUCK REGION-CENTRAL SYSTEM | 22,735 |
| IDLEVIEW MOBILE HOME PARK | 138 |
Frequently asked questions about Naugatuck tap water
Is Naugatuck tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Naugatuck. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Naugatuck?
2 public water suppliers report drinking-water monitoring for Naugatuck, Connecticut to the EPA. Each is listed above with its population served.
What contaminants are in Naugatuck's water?
The contaminants EPA monitoring detected in Naugatuck include Nitrate, Nitrate-Nitrite, Fluoride, Copper, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.