1,1,1,2-Tetrachloroethane
Northwest Harris County Municipal Utility District 19
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
12
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 | 2 | 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 |
|---|---|---|
| 2018-05-17 | AE26819 | ND |
| 2018-05-17 | AE26823 | ND |
| 2019-11-07 | AE88931 | ND |
| 2019-11-07 | AE88937 | ND |
| 2020-10-01 | AF29290 | ND |
| 2020-10-01 | AF29300 | ND |
| 2021-06-10 | AF57515 | ND |
| 2021-06-10 | AF57537 | ND |
| 2022-05-17 | AF97248 | ND |
| 2022-05-17 | AF97250 | ND |
| 2023-07-20 | AG49615 | ND |
| 2023-07-20 | AG49637 | ND |