trans-1,2-Dichloroethylene
Orange County WCID 1
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 | 5 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2014-04-17 | AC51076 | ND |
2015-02-26 | AC82115 | ND |
2015-02-26 | AC82127 | ND |
2016-02-23 | AD25080 | ND |
2016-02-23 | AD25078 | ND |
2017-02-21 | AD71272 | ND |
2017-02-21 | AD71274 | ND |
2017-05-23 | AD85279 | ND |
2017-08-25 | AD94489 | ND |
2017-11-07 | AE04095 | ND |
2018-02-14 | AE13802 | ND |
2018-02-14 | AE13788 | ND |
2018-02-14 | AE13784 | ND |
2019-04-08 | AE61410 | ND |
2019-04-08 | AE61408 | ND |
2019-04-08 | AE61406 | ND |