trans-1,2-Dichloroethylene
Chatsworth
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
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 | 3 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-04-28 | AI38854 | ND |
| 2014-04-28 | AI38853 | ND |
| 2015-03-16 | AI69026 | ND |
| 2015-03-16 | AI69025 | ND |
| 2016-03-21 | AJ08418 | ND |
| 2016-03-21 | AJ08417 | ND |
| 2016-03-21 | AJ08416 | ND |
| 2017-06-20 | AJ58059 | ND |
| 2017-06-20 | AJ58060 | ND |
| 2018-05-07 | AJ88818 | ND |
| 2018-05-07 | AJ88817 | ND |
| 2019-04-29 | AK16000 | ND |
| 2019-04-29 | AK15999 | ND |
| 2019-04-29 | AK15998 | ND |
| 2019-05-20 | AK17838 | ND |
| 2019-07-16 | AK22500 | ND |
| 2019-10-14 | AK35010 | ND |