1,1,1,2-Tetrachloroethane
Hanson Water Department
NOTE: Hanson Water Department purchases water from Brockton Water Commission which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Brockton Water Commission.
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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
NOTE: Hanson Water Department purchases water from Brockton Water Commission which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Brockton Water Commission.
| Date | Result |
|---|---|
| 2018-03-06 | ND |
| 2018-03-06 | ND |
| 2019-03-11 | ND |
| 2019-03-12 | ND |
| 2020-03-10 | ND |
| 2020-03-24 | ND |
| 2021-03-03 | ND |
| 2021-04-16 | ND |
| 2022-03-02 | ND |
| 2023-03-01 | ND |