trans-1,2-Dichloroethylene
St Charles Water District 1 East Bank
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 | 8 | 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 |
---|---|---|
2014-01-22 | AD88495 | ND |
2014-01-22 | AD88495 | ND |
2015-04-06 | 35182606002 | ND |
2015-04-06 | 35182606002 | ND |
2016-03-01 | 35232149004 | ND |
2016-03-01 | 35232149004 | ND |
2017-01-25 | 35291206005 | ND |
2017-01-25 | 35291206005 | ND |
2018-01-23 | 35370117001 | ND |
2018-01-23 | 35370117001 | ND |
2019-01-22 | 35444037001 | ND |
2019-01-22 | 35444038001 | ND |
2019-01-22 | 35444037001 | ND |
2019-01-22 | 35444038001 | ND |
2019-09-05 | 35495382001 | ND |
2019-09-05 | 35495382002 | ND |
2019-09-05 | 35495382001 | ND |
2019-09-05 | 35495382002 | ND |