1,1,1,2-Tetrachloroethane
City of Humble
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
25
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2015-01-20 | AC76796 | ND |
| 2015-01-20 | AC76784 | ND |
| 2015-01-20 | AC76780 | ND |
| 2015-01-20 | AC76800 | ND |
| 2015-01-20 | AC76798 | ND |
| 2016-01-21 | AD19313 | ND |
| 2016-01-21 | AD19307 | ND |
| 2016-01-21 | AD19315 | ND |
| 2016-01-21 | AD19317 | ND |
| 2016-01-21 | AD19309 | ND |
| 2017-01-05 | AD63235 | ND |
| 2017-01-05 | AD63231 | ND |
| 2017-01-05 | AD63233 | ND |
| 2017-01-05 | AD63263 | ND |
| 2017-04-21 | AD80683 | ND |
| 2018-01-19 | AE09579 | ND |
| 2018-01-19 | AE09595 | ND |
| 2018-01-19 | AE09539 | ND |
| 2018-04-03 | AE21021 | ND |
| 2018-04-03 | AE21019 | ND |
| 2019-01-15 | AE49863 | ND |
| 2019-01-15 | AE49877 | ND |
| 2019-01-15 | AE49873 | ND |
| 2019-01-15 | AE49879 | ND |
| 2019-01-15 | AE49853 | ND |