trans-1,2-Dichloroethylene
Madawaska Water District
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 | 3 | 0 | ND |
| 2017 | ND | 3 | 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 |
|---|---|---|
| 2014-04-29 | ND | |
| 2014-04-29 | ND | |
| 2014-05-06 | ND | |
| 2015-03-24 | K006134001 | ND |
| 2015-03-24 | K006132001 | ND |
| 2015-03-25 | K006133001 | ND |
| 2016-04-26 | L009378001 | ND |
| 2016-05-03 | L009379001 | ND |
| 2016-05-31 | L009377001 | ND |
| 2017-05-23 | 1701624-01 | ND |
| 2017-05-23 | 1701623-01 | ND |
| 2017-05-24 | 1701622-01 | ND |
| 2018-05-01 | 1804340-01 | ND |
| 2018-05-01 | 1804342-01 | ND |
| 2018-05-08 | 1804341-01 | ND |
| 2019-04-30 | 1904021-01 | ND |
| 2019-04-30 | 1904022-01 | ND |
| 2019-05-16 | 1904020-01 | ND |