1,1,1,2-Tetrachloroethane
City of Alamo Heights
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 |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | ND | 5 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | ND | 8 | 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 |
---|---|---|
2015-04-27 | AC89591 | ND |
2015-04-27 | AC89585 | ND |
2015-04-27 | AC89593 | ND |
2015-04-27 | AC89587 | ND |
2015-04-27 | AC89595 | ND |
2016-03-15 | AD28830 | ND |
2016-03-15 | AD28838 | ND |
2016-03-15 | AD28804 | ND |
2016-03-15 | AD28810 | ND |
2016-03-15 | AD28808 | ND |
2017-04-10 | AD79194 | ND |
2017-04-10 | AD79192 | ND |
2017-04-10 | AD79188 | ND |
2017-04-10 | AD79204 | ND |
2017-04-10 | AD79190 | ND |
2018-01-10 | AE08651 | ND |
2018-01-10 | AE08653 | ND |
2018-01-10 | AE08663 | ND |
2018-01-10 | AE08665 | ND |
2018-01-10 | AE08659 | ND |
2018-04-09 | AE21698 | ND |
2018-08-03 | AE35854 | ND |
2018-10-12 | AE43450 | ND |
2019-03-01 | AE56929 | ND |
2019-03-27 | AE60220 | ND |
2019-03-27 | AE60232 | ND |
2019-03-27 | AE60222 | ND |
2019-03-27 | AE60258 | ND |