1,1,1,2-Tetrachloroethane
Harris County FWSD 51
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
10
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 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2015-01-21 | AC77069 | ND |
| 2015-01-21 | AC77071 | ND |
| 2016-01-25 | AD19733 | ND |
| 2016-01-25 | AD19757 | ND |
| 2017-03-03 | AD73427 | ND |
| 2017-04-28 | AD81886 | ND |
| 2018-02-08 | AE13059 | ND |
| 2018-02-08 | AE13055 | ND |
| 2019-01-14 | AE49631 | ND |
| 2019-01-14 | AE49637 | ND |