trans-1,2-Dichloroethylene
Central Texas Water Supply Corporation
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
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 60 ppb
The EWG Health Guideline of 60 ppb for trans-1,2-dichloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
EPA Maximum Contaminant
Level (MCL) 100 ppb
The legal limit for trans-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-04-08 | AC49753 | ND |
2014-07-23 | AC60714 | ND |
2015-03-10 | AC83519 | ND |
2015-09-03 | AD05676 | ND |
2016-03-14 | AD28558 | ND |
2016-09-29 | AD52052 | ND |
2017-03-20 | AD75733 | ND |
2017-08-21 | AD93557 | ND |
2018-01-17 | AE09111 | ND |
2018-08-14 | AE36989 | ND |
2019-03-27 | AE60192 | ND |
2019-08-15 | AE78974 | ND |