trans-1,2-Dichloroethylene
Golden State Water Company (GSWC) - San Dimas
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 |
---|---|---|
2014-02-19 | 9588-051-0930 | ND |
2014-05-14 | 9588-014-1010 | ND |
2015-02-18 | 9588-051-0920 | ND |
2015-05-18 | 9588-014-0915 | ND |
2016-02-16 | 9588-051-0825 | ND |
2016-05-12 | 9588-014-0925 | ND |
2017-01-05 | 9588-051-0800 | ND |
2017-05-15 | 9588-014-0905 | ND |
2018-02-15 | 9588-051-1045 | ND |
2018-05-16 | 9588-014-0855 | ND |
2019-02-11 | 9588-051-0835 | ND |
2019-06-12 | 9588-014-0830 | ND |