trans-1,2-Dichloroethylene
City of Douglas
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 | 6 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 7 | 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 |
|---|---|---|
| 2014-03-12 | 4030947-01V | ND |
| 2014-06-03 | 4060255-03 | ND |
| 2014-06-03 | 4060255-02 | ND |
| 2014-06-03 | 4060255-01 | ND |
| 2014-09-09 | 4090778-01 | ND |
| 2014-12-01 | 4120296-01 | ND |
| 2015-03-04 | 5030402-01 | ND |
| 2015-06-02 | 5060228-01 | ND |
| 2015-09-16 | 5091459-01 | ND |
| 2015-12-01 | 5120079-01 | ND |
| 2016-03-09 | 6031005-01 | ND |
| 2016-06-07 | 6060567-04 | ND |
| 2016-06-07 | 6060567-06 | ND |
| 2016-06-07 | 6060567-05 | ND |
| 2016-06-07 | 6060567-03 | ND |
| 2016-06-07 | 6060567-02 | ND |
| 2016-06-07 | 6060567-01 | ND |
| 2017-06-06 | 7060482-02 | ND |
| 2017-06-06 | 7060482-01 | ND |
| 2018-06-05 | 18F0440-02 | ND |
| 2018-06-05 | 18F0440-01 | ND |
| 2019-03-20 | 19C2177-01 | ND |
| 2019-03-20 | 19C2177-06 | ND |
| 2019-03-20 | 19C2177-05 | ND |
| 2019-03-20 | 19C2177-04 | ND |
| 2019-03-20 | 19C2177-03 | ND |
| 2019-03-20 | 19C2177-02 | ND |