What was found in South Windsor's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 7650 µg/L 77% of the EPA limit 10000 µg/L | 4/4 | SYR4 |
| Nitrate-Nitrite | 7650 µg/L 77% of the EPA limit 10000 µg/L | 4/4 | SYR4 |
| Fluoride | 1640 µg/L 41% of the EPA limit 4000 µg/L | 4/4 | SYR4 |
| Copper | 1117 µg/L 86% of the EPA limit 1300 µg/L | 4/4 | SYR4 |
| Barium | 425 µg/L 21% of the EPA limit 2000 µg/L | 4/4 | SYR4 |
| Lead | 227 µg/L 1513% of the EPA limit, in the worst sample — 15 µg/L | 4/4 | SYR4 |
| TTHM | 160 µg/L 200% of the EPA limit, in the worst sample — 80 µg/L | 3/4 | SYR4 |
| Chloroform | 150 µg/L No EPA limit set | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 76.21 µg/L 127% of the EPA limit, in the worst sample — 60 µg/L | 3/4 | SYR4 |
| Nitrite | 76 µg/L 7.6% of the EPA limit 1000 µg/L | 2/4 | SYR4 |
| Monobromoacetic Acid | 63.179 µg/L No EPA limit set | 2/4 | SYR4 |
| Trichloroacetic Acid | 58.366 µg/L No EPA limit set | 3/4 | SYR4 |
| Dichloroacetic Acid | 26.8 µg/L No EPA limit set | 3/4 | SYR4 |
| Lithium | 19.8 µg/L No EPA limit set | 1/4 | UCMR-5 |
| Bromodichloromethane | 18.3 µg/L No EPA limit set | 3/4 | SYR4 |
| Monochloroacetic Acid | 15 µg/L No EPA limit set | 3/4 | SYR4 |
| Bromate | 12 µg/L 120% of the EPA limit, in the worst sample — 10 µg/L | 1/4 | SYR4 |
| Dibromochloromethane | 9.2 µg/L No EPA limit set | 3/4 | SYR4 |
| Dibromoacetic Acid | 7.6 µg/L No EPA limit set | 2/4 | SYR4 |
| Combined Uranium | 5.7 µg/L 19% of the EPA limit 30 µg/L | 2/4 | SYR4 |
| Arsenic | 5.5 µg/L 55% of the EPA limit 10 µg/L | 2/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.45 pCi/L 36% of the EPA limit 15 pCi/L | 1/4 | SYR4 |
| Gross Beta Particle Activity | 5.4 pCi/L No EPA limit set | 1/4 | SYR4 |
| Cyanide | 5 µg/L 2.5% of the EPA limit 200 µg/L | 1/4 | SYR4 |
| Bromoform | 3.9 µg/L No EPA limit set | 3/4 | SYR4 |
| Combined Radium (-226 And -228) | 3.1 pCi/L 62% of the EPA limit 5 pCi/L | 2/4 | SYR4 |
| Trichloroethylene | 3.1 µg/L 62% of the EPA limit 5 µg/L | 3/4 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L | 3/4 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L | 1/4 | SYR4 |
| 1,1-Dichloroethylene | 1.5 µg/L 21% of the EPA limit 7 µg/L | 1/4 | SYR4 |
| Styrene | 1.2 µg/L 1.2% of the EPA limit 100 µg/L | 1/4 | SYR4 |
| Tetrachloroethylene | 1.2 µg/L 24% of the EPA limit 5 µg/L | 2/4 | SYR4 |
| 1,1,1-Trichloroethane | 1.1 µg/L 0.6% of the EPA limit 200 µg/L | 1/4 | SYR4 |
| Beryllium, Total | 0.6340 µg/L 16% of the EPA limit 4 µg/L | 1/4 | SYR4 |
| Toluene | 0.5400 µg/L 0.1% of the EPA limit 1000 µg/L | 1/4 | SYR4 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L | 1/4 | SYR4 |
| Benzo(A)Pyrene | 0.0630 µg/L 32% of the EPA limit 0.2000 µg/L | 1/4 | SYR4 |
| Hexachlorocyclopentadiene | 0.0170 µg/L 0% of the EPA limit 50 µg/L | 1/4 | SYR4 |
| PFOS | 0.0160 µg/L No EPA limit set | 2/4 | UCMR-5 |
| PFBS | 0.0150 µg/L No EPA limit set | 2/4 | UCMR-5 |
| PFOA | 0.0130 µg/L No EPA limit set | 2/4 | UCMR-5 |
| Heptachlor Epoxide | 0.0063 µg/L 3.2% of the EPA limit 0.2000 µg/L | 1/4 | SYR4 |
| Pfba | 0.0050 µg/L No EPA limit set | 1/4 | UCMR-5 |
| Pfhxa | 0.0047 µg/L No EPA limit set | 2/4 | UCMR-5 |
| Pfpea | 0.0047 µg/L No EPA limit set | 2/4 | UCMR-5 |
| PFHXS | 0.0038 µg/L No EPA limit set | 2/4 | UCMR-5 |
| Pfhpa | 0.0035 µg/L No EPA limit set | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 4/4 | 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 single worst sample on
record — 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 South Windsor
| Supplier | Population served |
|---|---|
| METROPOLITAN DISTRICT COMMISSION | 390,887 |
| CTWC - NORTHERN REG-WESTERN SYSTEM | 101,313 |
| MANCHESTER WATER DEPARTMENT | 51,198 |
| VERNON VILLAGE INC. | 430 |
Frequently asked questions about South Windsor tap water
Is South Windsor tap water safe to drink?
EPA testing detected 48 contaminants in the water serving South Windsor. 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 South Windsor?
4 public water suppliers report drinking-water monitoring for South Windsor, Connecticut to the EPA. Each is listed above with its population served.
What contaminants are in South Windsor's water?
The contaminants EPA monitoring detected in South Windsor include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. The full list, with the highest level found 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.