What was found in Ellington'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 | 5976.999999999996 µg/L 60% of the EPA limit 10000 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 5938 µg/L 59% of the EPA limit 10000 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Fluoride | 1075.9999999999998 µg/L 27% of the EPA limit 4000 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Barium | 346.79999999999995 µg/L 17% of the EPA limit 2000 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Copper | 231.39999999999998 µg/L 18% of the EPA limit 1300 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| TTHM | 80.8 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Lead | 72.10000000000011 µg/L 481% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Chloroform | 62.44 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Nitrite | 55.89999999999995 µg/L 5.6% of the EPA limit 1000 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 27 µg/L 45% of the EPA limit 60 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Lithium | 19.8 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| Bromodichloromethane | 15 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 14 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 13.25 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 6 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 5.455 µg/L 18% of the EPA limit 30 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2018 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.4035 pCi/L 36% of the EPA limit 15 pCi/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2018 | 1/1 | SYR4 |
| Arsenic | 5.25 µg/L 53% of the EPA limit 10 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Cyanide | 5 µg/L 2.5% of the EPA limit 200 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 2.9000000000000004 pCi/L 58% of the EPA limit 5 pCi/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2018 | 1/1 | SYR4 |
| Bromoform | 2.0299999999999985 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 1.295 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Trichloroethylene | 0.9970 µg/L 20% of the EPA limit 5 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Tetrachloroethylene | 0.7065 µg/L 14% of the EPA limit 5 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| Benzo(A)Pyrene | 0.0630 µg/L 32% of the EPA limit 0.2000 µg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2019 | 1/1 | SYR4 |
| PFOA | 0.0080 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| PFOS | 0.0060 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| Pfba | 0.0050 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| PFBS | 0.0030 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0030 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| PFHXS | 0.0030 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0030 µg/L No EPA limit set Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CTWC - NORTHERN REG-WESTERN SYSTEM · 101,313 people · 2026 | 1/1 | 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 Ellington
| Supplier | Population served |
|---|---|
| CTWC - NORTHERN REG-WESTERN SYSTEM | 101,313 |
Frequently asked questions about Ellington tap water
Is Ellington tap water safe to drink?
EPA testing detected 36 contaminants in the water serving Ellington. 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 Ellington?
1 public water supplier report drinking-water monitoring for Ellington, Connecticut to the EPA. Each is listed above with its population served.
What contaminants are in Ellington's water?
The contaminants EPA monitoring detected in Ellington include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Copper. 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.