What was found in Coventry'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 |
|---|---|---|---|
| Fluoride | 110 µg/L 2.8% of the EPA limit 4000 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 2108 µg/L — CTWC - NORTHERN REGION-LAKEWOOD · 276 people · 2017 | 10/10 | SYR4 |
| Nitrate | 60 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 1530 µg/L — CTWC - PILGRIM HILLS DIVISION · 229 people · 2019 | 10/10 | SYR4 |
| Nitrate-Nitrite | 57.15 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 1516 µg/L — CTWC - PILGRIM HILLS DIVISION · 229 people · 2019 | 10/10 | SYR4 |
| Copper | 1232.5 µg/L 95% of the EPA limit 1300 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2018 | 10/10 | SYR4 |
| Barium | 24.85 µg/L 1.2% of the EPA limit 2000 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 61.75 µg/L — TWIN HILLS WATER DISTRICT · 156 people · 2018 | 8/10 | SYR4 |
| Nitrite | 37.2 µg/L 3.7% of the EPA limit 1000 µg/L Highest in the city: COVENTRY HOUSING AUTHORITY-UPPER SYSTEM · 80 people · 2019 | 1/10 | SYR4 |
| TTHM | 3.0375 µg/L 3.8% of the EPA limit 80 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 27.89 µg/L — CTWC - SOUTH COVENTRY SYSTEM · 501 people · 2019 | 6/10 | SYR4 |
| Lead | 13.545 µg/L 90% of the EPA limit 15 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2018
Highest in the city: 23.28 µg/L — CTWC - PILGRIM HILLS DIVISION · 229 people · 2019 | 10/10 | SYR4 |
| Chloroform | 0.6425 µg/L No EPA limit set Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 14.12 µg/L — CTWC - SOUTH COVENTRY SYSTEM · 501 people · 2019 | 6/10 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1 µg/L 1.7% of the EPA limit 60 µg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 10.18 µg/L — CTWC - NORTHERN REGION-LAKEWOOD · 276 people · 2019 | 6/10 | SYR4 |
| Combined Uranium | 7.9 µg/L 26% of the EPA limit 30 µg/L Highest in the city: CTWC - SOUTH COVENTRY SYSTEM · 501 people · 2017 | 8/10 | SYR4 |
| Gross Beta Particle Activity | 7.6395 pCi/L No EPA limit set Highest in the city: CTWC - SOUTH COVENTRY SYSTEM · 501 people · 2017 | 1/10 | SYR4 |
| Bromodichloromethane | 0.9400 µg/L No EPA limit set Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 7.58 µg/L — CTWC - SOUTH COVENTRY SYSTEM · 501 people · 2019 | 6/10 | SYR4 |
| Dibromochloromethane | 1.38 µg/L No EPA limit set Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 5.86 µg/L — CTWC - SOUTH COVENTRY SYSTEM · 501 people · 2019 | 6/10 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.3 pCi/L 35% of the EPA limit 15 pCi/L Highest in the city: CTWC - NORTHERN REGION-LAKEWOOD · 276 people · 2017 | 6/10 | SYR4 |
| Dichloroacetic Acid | 4.64 µg/L No EPA limit set Highest in the city: CTWC - NORTHERN REGION-LAKEWOOD · 276 people · 2019 | 5/10 | SYR4 |
| Trichloroacetic Acid | 4.43 µg/L No EPA limit set Highest in the city: CTWC - NORTHERN REGION-LAKEWOOD · 276 people · 2019 | 2/10 | SYR4 |
| Bromoform | 0.7920 µg/L No EPA limit set Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 3.295 µg/L — CTWC - SOUTH COVENTRY SYSTEM · 501 people · 2019 | 6/10 | SYR4 |
| Dibromoacetic Acid | 1 µg/L No EPA limit set Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2019
Highest in the city: 2.65 µg/L — CTWC - NORTHERN REGION-LAKEVIEW TERRACE · 472 people · 2019 | 6/10 | SYR4 |
| Combined Radium (-226 And -228) | 1.564 pCi/L 31% of the EPA limit 5 pCi/L Highest in the city: CTWC - NORTHERN REGION-LAKEVIEW TERRACE · 472 people · 2017 | 7/10 | SYR4 |
| Beryllium, Total | 0.3000 µg/L 7.5% of the EPA limit 4 µg/L Highest in the city: CTWC - NORTHERN REG-NATHAN HALE SYSTEM · 160 people · 2017 | 2/10 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CTWC - COVENTRY HILLS DIV · 700 people · 2025
Highest in the city: 0.0092 mg/L — CTWC - GENERAL WATER DIVISION · 306 people · 2025 | 10/10 | 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 Coventry
Frequently asked questions about Coventry tap water
Is Coventry tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Coventry. 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 Coventry?
10 public water suppliers report drinking-water monitoring for Coventry, Connecticut to the EPA. Each is listed above with its population served.
What contaminants are in Coventry's water?
The contaminants EPA monitoring detected in Coventry include Fluoride, Nitrate, Nitrate-Nitrite, Copper, Barium. 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.