1,1,1,2-Tetrachloroethane
Harris County Water Control and Improvement District 70
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
11
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 |
|---|---|---|---|---|
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-10-21 | AC70138 | ND |
| 2015-04-29 | AC89850 | ND |
| 2015-04-29 | AC89862 | ND |
| 2016-03-30 | AD31206 | ND |
| 2016-03-30 | AD31180 | ND |
| 2017-05-05 | AD83124 | ND |
| 2017-05-05 | AD83126 | ND |
| 2018-03-09 | AE17920 | ND |
| 2018-03-09 | AE17890 | ND |
| 2019-05-09 | AE65729 | ND |
| 2019-05-09 | AE65723 | ND |