trans-1,2-Dichloroethylene
Koa of Ely Campground
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 | 3 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2014-12-30 | 1412822-001-V | ND |
2015-12-03 | 1512128-001-VOC | ND |
2015-12-17 | 1512611-001VOC | ND |
2016-03-24 | 201603290067 | ND |
2016-06-21 | 201606240159 | ND |
2016-12-15 | 6L22011-01 | ND |
2017-09-12 | 1709276-001 | ND |
2017-10-12 | 1710406-001 | ND |
2017-11-21 | 1711690-002 | ND |
2018-09-06 | 18090199-001 | ND |
2019-09-05 | 19090173-001 | ND |