1,1,1,2-Tetrachloroethane
Northwest Grayson County Water Control and Improvement District 1
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 | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 5 | 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 |
---|---|---|
2015-07-22 | Q1528461002 | ND |
2015-07-22 | Q1528461003 | ND |
2016-11-03 | Q1647470001 | ND |
2016-11-03 | Q1647470007 | ND |
2017-11-14 | Q1758443009 | ND |
2017-11-14 | Q1758443006 | ND |
2017-12-12 | Q1765385003 | ND |
2018-02-21 | Q1807299003 | ND |
2018-05-29 | Q1821406001 | ND |
2018-09-10 | Q1835971002 | ND |
2018-11-19 | Q1847248001 | ND |
2018-11-19 | Q1847248009 | ND |
2019-03-06 | Q1909735005 | ND |
2019-03-06 | Q1909735007 | ND |
2019-03-06 | Q1909735002 | ND |