1,1,1,2-Tetrachloroethane
Sharyland Water Supply Corporation
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 6 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2014-08-19 | AC64300 | ND |
2014-08-19 | AC64326 | ND |
2015-08-03 | AD02131 | ND |
2015-08-03 | AD02129 | ND |
2016-03-23 | AD30149 | ND |
2016-05-11 | AD36396 | ND |
2016-09-14 | AD49450 | ND |
2016-09-14 | AD49488 | ND |
2016-09-14 | AD49452 | ND |
2016-10-26 | AD55147 | ND |
2017-08-02 | AD92158 | ND |
2017-08-02 | AD92156 | ND |
2017-08-02 | AD92160 | ND |
2018-08-31 | AE39147 | ND |
2018-08-31 | AE39145 | ND |
2018-08-31 | AE39155 | ND |
2019-06-24 | AE71765 | ND |
2019-09-18 | AE83972 | ND |
2019-09-18 | AE83974 | ND |