trans-1,2-Dichloroethylene
Greenwood
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 | 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 |
|---|---|---|
| 2014-07-02 | 14184005501 | ND |
| 2014-10-08 | 14282016601 | ND |
| 2015-07-08 | 15191001409 | ND |
| 2015-10-06 | 15281007701 | ND |
| 2016-07-06 | 16189016402 | ND |
| 2016-10-04 | 16280010101 | ND |
| 2017-07-03 | 17187011901 | ND |
| 2017-10-03 | 17277001301 | ND |
| 2018-07-03 | 18186013009 | ND |
| 2018-10-02 | 18277000909 | ND |
| 2019-07-08 | 19192006602 | ND |
| 2019-10-09 | 19283006801 | ND |