trans-1,2-Dichloroethylene
Lafayette Water Works
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-06-02 | 318591RV-1402 | ND |
2014-06-02 | 318592RV-1402 | ND |
2015-06-23 | 342731RV-1502 | ND |
2015-07-21 | 344572RV-1503 | ND |
2016-06-06 | 16060789001ARV-1 | ND |
2016-06-06 | 16060789003ARV-1 | ND |
2017-05-23 | 2017052173RV-170 | ND |
2017-05-23 | 2017052174RV-170 | ND |
2018-05-29 | 2018052853RV-180 | ND |
2018-05-29 | 2018052858RV-180 | ND |
2019-05-22 | 2019052290RV-190 | ND |
2019-05-22 | 2019052291RV-190 | ND |