1,1,1,2-Tetrachloroethane
Harris County Municipal Utility District 5
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 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-05-02 | AE24843 | ND |
| 2019-02-06 | AE53204 | ND |
| 2020-02-21 | AE99549 | ND |
| 2021-02-02 | AF42236 | ND |
| 2022-09-16 | AG13632 | ND |
| 2022-11-30 | AG20307 | ND |
| 2023-02-13 | AG28599 | ND |
| 2023-05-09 | AG39751 | ND |
| 2023-08-22 | AG53541 | ND |