1,1,1,2-Tetrachloroethane
Watertown Waterworks
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
15
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
ppb = parts per billion
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
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-05-05 | 783787 | ND |
| 2014-05-05 | 783790 | ND |
| 2014-05-05 | 783793 | ND |
| 2015-04-20 | 855197 | ND |
| 2016-05-02 | 918945 | ND |
| 2016-05-02 | 918947 | ND |
| 2016-05-02 | 918949 | ND |
| 2017-05-03 | 986655 | ND |
| 2017-05-03 | 986659 | ND |
| 2018-02-12 | 1040467 | ND |
| 2018-04-09 | 1049313 | ND |
| 2018-04-09 | 1049315 | ND |
| 2019-03-20 | 1110824 | ND |
| 2019-03-20 | 1110826 | ND |
| 2019-03-20 | 1110828 | ND |