1,1,1,2-Tetrachloroethane
Status: No national drinking water standard exists
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
2017-2019:
3
states detected
13
utilities detected
31,858
people served
1
states over health guideline
1
utilities over health guideline
2,336
people served over health guideline
Health concerns for 1,1,1,2-tetrachloroethane
Cancer
Harm to the liver
Change to the central nervous system
State and national drinking water standards and health guidelines
EWG Health Guideline 1 ppb
The EWG Health Guideline of 1 ppb for 1,1,1,2-tetrachloroethane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
States reporting 1,1,1,2-tetrachloroethane in drinking water
| UTILITIES REPORTING ABOVE HEALTH GUIDELINES | UTILITIES WITH CONTAMINATION | ||||||
|---|---|---|---|---|---|---|---|
| State | Utilities | People Served | Utilities | People Served | |||
| Alabama | 0 | 0 | 1 | 13,880 | |||
| New York | 1 | 2,336 | 11 | 11,578 | |||
| Ohio | 0 | 0 | 1 | 6,400 | |||
Utilities with the highest amounts of 1,1,1,2-tetrachloroethane, 2017-2019
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Canisteo Village | Canisteo, NY | 2 of 6 | 0.833 ppb | 2,336 |
| Ausable Heights Water System | Keeseville, NY | 1 of 1 | 0.500 ppb | 46 |
| Gardeau Water District | Castile, NY | 1 of 4 | 0.125 ppb | 60 |
| Perry Village* | , NY | 1 of 4 | 0.125 ppb | 4,348 |
| Perry Center Water District | Perry, NY | 1 of 4 | 0.125 ppb | 150 |
| Silver Lake Institute - Castile Water District #1 | , NY | 1 of 4 | 0.125 ppb | 440 |
| Springhill Mobile Home Park | Wappingers Falls, NY | 1 of 9 | 0.0556 ppb | 150 |
| Farm-to-market Associates | Brewster, NY | 1 of 9 | 0.0556 ppb | 48 |
| Union Springs Village* | Union Springs, NY | 1 of 24 | 0.0208 ppb | 3,000 |
| Springport Water District #1 - South | Cayuga, NY | 1 of 24 | 0.0208 ppb | 500 |
| Springport Water District #1 - North | Cayuga, NY | 1 of 24 | 0.0208 ppb | 500 |
| Wallingford Water Department | Wallingford, CT | 1 of 35 | 0.0143 ppb | 37,267 |
| Milford City Public Water System | Milford, OH | 1 of 57 | 0.00877 ppb | 6,400 |
| Fort Rucker - American Water | Fort Rucker, AL | 1 of 62 | 0.00807 ppb | 13,880 |
* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report 1,1,1,2-Tetrachloroethane, but it likely has the contaminant in its water supply.
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Wallingford Water Department | Wallingford, CT | 1 of 35 | 0.0143 ppb | 37,267 |
| Fort Rucker - American Water | Fort Rucker, AL | 1 of 62 | 0.00807 ppb | 13,880 |