1,1,1,2-Tetrachloroethane
Harris County MUD 167
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 |
|---|---|---|---|---|
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 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 |
|---|---|---|
| 2014-08-13 | AC63433 | ND |
| 2015-07-30 | AD01788 | ND |
| 2016-12-05 | AD60361 | ND |
| 2017-02-03 | AD68751 | ND |
| 2017-02-03 | AD68749 | ND |
| 2017-04-21 | AD80731 | ND |
| 2017-08-01 | AD91627 | ND |
| 2017-10-24 | AE01839 | ND |
| 2018-11-06 | AE45445 | ND |
| 2018-11-06 | AE45447 | ND |
| 2019-08-27 | AE81098 | ND |
| 2019-08-27 | AE81096 | ND |