What was found in Harwinton'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 | 59 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019
Highest in the city: 2200 µg/L — GARDEN LANE APARTMENTS · 40 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 78.5 µg/L 0.8% of the EPA limit 10000 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019
Highest in the city: 1930 µg/L — GARDEN LANE APARTMENTS · 40 people · 2019 | 2/2 | SYR4 |
| Copper | 136.4 µg/L 10% of the EPA limit 1300 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019
Highest in the city: 945 µg/L — GARDEN LANE APARTMENTS · 40 people · 2019 | 2/2 | SYR4 |
| Fluoride | 650 µg/L 16% of the EPA limit 4000 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 2/2 | SYR4 |
| TTHM | 66.1 µg/L 83% of the EPA limit 80 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Chloroform | 60.23 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 2/2 | SYR4 |
| Barium | 21.935 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019
Highest in the city: 60 µg/L — GARDEN LANE APARTMENTS · 40 people · 2018 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 48 µg/L 80% of the EPA limit 60 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Lead | 40.48 µg/L 270% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 26.96 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 21.9 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 5.26 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 3.2 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Chromium | 2.85 µg/L 2.9% of the EPA limit 100 µg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.285 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 2.1675 µg/L 7.2% of the EPA limit 30 µg/L Highest in the city: GARDEN LANE APARTMENTS · 40 people · 2018 | 1/2 | SYR4 |
| Dibromoacetic Acid | 2.065 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Toluene | 1.475 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: GARDEN LANE APARTMENTS · 40 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Highest in the city: GARDEN LANE APARTMENTS · 40 people · 2018 | 1/2 | SYR4 |
| Dibromochloromethane | 0.8205 µg/L No EPA limit set Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Styrene | 0.6000 µg/L 0.6% of the EPA limit 100 µg/L Highest in the city: GARDEN LANE APARTMENTS · 40 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.5300 pCi/L 11% of the EPA limit 5 pCi/L Main supplier: TORRINGTON WATER COMPANY · 37,915 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: TORRINGTON WATER COMPANY · 37,915 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 Harwinton
| Supplier | Population served |
|---|---|
| TORRINGTON WATER COMPANY | 37,915 |
| GARDEN LANE APARTMENTS | 40 |
Frequently asked questions about Harwinton tap water
Is Harwinton tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Harwinton. 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 Harwinton?
2 public water suppliers report drinking-water monitoring for Harwinton, Connecticut to the EPA. Each is listed above with its population served.
What contaminants are in Harwinton's water?
The contaminants EPA monitoring detected in Harwinton include Nitrate, Nitrate-Nitrite, Copper, Fluoride, 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.