1,1,1,2-Tetrachloroethane
Danbury Water Department
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
13
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 |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-21 | 210745GE | ND |
| 2018-02-21 | 210744GE | ND |
| 2019-08-15 | VOC1 200545121 | ND |
| 2019-08-15 | VOC1 200545122 | ND |
| 2020-02-20 | VOC1 200566893 | ND |
| 2020-02-20 | VOC1 200566892 | ND |
| 2020-02-21 | VOC1 200566982 | ND |
| 2021-01-21 | VOC1 200604571 | ND |
| 2021-01-21 | VOC1 200604570 | ND |
| 2022-01-20 | 279326 | ND |
| 2022-01-20 | 279325 | ND |
| 2023-02-09 | 306232 | ND |
| 2023-02-09 | 306231 | ND |