What was found in Griswold'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 | 4000 µg/L 40% of the EPA limit 10000 µg/L | 6/6 | SYR4 |
| Nitrate-Nitrite | 4000 µg/L 40% of the EPA limit 10000 µg/L | 6/6 | SYR4 |
| Copper | 2370 µg/L 182% of the EPA limit, in the worst sample — 1300 µg/L | 6/6 | SYR4 |
| Fluoride | 140 µg/L 3.5% of the EPA limit 4000 µg/L | 2/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 98 µg/L 163% of the EPA limit, in the worst sample — 60 µg/L | 3/6 | SYR4 |
| Chloroform | 86.18 µg/L No EPA limit set | 4/6 | SYR4 |
| TTHM | 85 µg/L 106% of the EPA limit, in the worst sample — 80 µg/L | 4/6 | SYR4 |
| Lead | 81 µg/L 540% of the EPA limit, in the worst sample — 15 µg/L | 6/6 | SYR4 |
| Barium | 80 µg/L 4% of the EPA limit 2000 µg/L | 6/6 | SYR4 |
| Dichloroacetic Acid | 48 µg/L No EPA limit set | 3/6 | SYR4 |
| Trichloroacetic Acid | 44 µg/L No EPA limit set | 3/6 | SYR4 |
| Dibromochloromethane | 11 µg/L No EPA limit set | 4/6 | SYR4 |
| Bromodichloromethane | 8 µg/L No EPA limit set | 4/6 | SYR4 |
| Bromoform | 7 µg/L No EPA limit set | 3/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.9 pCi/L 33% of the EPA limit 15 pCi/L | 5/6 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 4.5 µg/L 75% of the EPA limit 6 µg/L | 1/6 | SYR4 |
| Combined Uranium | 4.4 µg/L 15% of the EPA limit 30 µg/L | 2/6 | SYR4 |
| Monochloroacetic Acid | 4.1 µg/L No EPA limit set | 1/6 | SYR4 |
| Dibromoacetic Acid | 3.2 µg/L No EPA limit set | 3/6 | SYR4 |
| Monobromoacetic Acid | 2 µg/L No EPA limit set | 1/6 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L | 1/6 | SYR4 |
| Combined Radium (-226 And -228) | 1.94 pCi/L 39% of the EPA limit 5 pCi/L | 5/6 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L | 1/6 | SYR4 |
| 2,4-D | 0.1650 µg/L 0.2% of the EPA limit 70 µg/L | 1/6 | SYR4 |
| Pfba | 0.0121 µg/L No EPA limit set | 1/6 | UCMR-5 |
| Lead | 0.0025 mg/L 17% of the EPA limit 0.0150 mg/L | 6/6 | LCR |
Water suppliers serving Griswold
| Supplier | Population served |
|---|---|
| JEWETT CITY WATER COMPANY | 6,840 |
| CTWC - BAY MOUNTAIN | 440 |
| JEWETT CITY WATER CO., S & W SYSTEM | 320 |
| CTWC - COUNTRY MOBILE DIV. | 186 |
| GRISWOLD MHP LLC | 99 |
| ASHLAND POND MOBILE HOME PARK | 74 |
Frequently asked questions about Griswold tap water
Is Griswold tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Griswold. 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 Griswold?
6 public water suppliers report drinking-water monitoring for Griswold, Connecticut to the EPA. Each is listed above with its population served.
What contaminants are in Griswold's water?
The contaminants EPA monitoring detected in Griswold include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Total Haloacetic Acids (HAA5). 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.