1,1,1,2-Tetrachloroethane
Harris County Water Control and Improvement District 96
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
9
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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 1 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2019-08-13 | AE78335 | ND |
| 2019-10-07 | AE85818 | ND |
| 2020-02-05 | AE97121 | ND |
| 2020-06-03 | AF13914 | ND |
| 2020-08-26 | AF25421 | ND |
| 2020-11-30 | AF35852 | ND |
| 2021-02-23 | AF43925 | ND |
| 2022-06-21 | AG01691 | ND |
| 2023-09-05 | AG54842 | ND |