trans-1,2-Dichloroethylene
The Village On Chopmist Hill
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 | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 6 | 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 |
|---|---|---|
| 2014-03-04 | 1401665-02_TO12 | ND |
| 2014-03-04 | 1401665-03_TO12 | ND |
| 2014-12-23 | 1406013-01_TO12 | ND |
| 2015-03-02 | 1501438-03_TO12 | ND |
| 2015-03-02 | 1501438-02_TO12 | ND |
| 2015-10-06 | 1504354-01_TO12 | ND |
| 2016-03-07 | 1601400-04_TO12 | ND |
| 2016-03-07 | 1601400-03_TO12 | ND |
| 2016-04-04 | 1601696-01_TO12 | ND |
| 2016-09-19 | 1604661-01_TO12 | ND |
| 2016-12-13 | 1605558-01_TO12 | ND |
| 2016-12-13 | 1605558-02_TO12 | ND |
| 2017-03-06 | 1701380-01_TO12 | ND |
| 2017-03-06 | 1701380-02_TO12 | ND |
| 2017-12-20 | 1705368-01_TO12 | ND |
| 2018-03-12 | 1801351-03_TO12 | ND |
| 2018-03-12 | 1801351-02_TO12 | ND |
| 2018-06-27 | 1802743-01_TO12 | ND |
| 2018-08-22 | 1803794-01_TO12 | ND |
| 2018-12-27 | 1805033-01_TO12 | ND |
| 2018-12-27 | 1805033-02_TO12 | ND |
| 2019-03-11 | 1901295-03_TO12 | ND |
| 2019-03-11 | 1901295-02_TO12 | ND |
| 2019-12-18 | 1905167-01_TO12 | ND |