trans-1,2-Dichloroethylene
Caddo Lake 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 | 1 | 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 |
---|---|---|
2014-12-04 | Q1458533007 | ND |
2015-07-23 | Q1528834001 | ND |
2015-07-23 | Q1528834003 | ND |
2016-10-18 | Q1644106001 | ND |
2016-10-18 | Q1644106003 | ND |
2017-05-31 | Q1723179009 | ND |
2017-05-31 | Q1723179001 | ND |
2018-09-20 | Q1837726002 | ND |
2018-09-20 | Q1837726003 | ND |
2019-06-10 | Q1933418005 | ND |
2019-06-10 | Q1933418007 | ND |