trans-1,2-Dichloroethylene
Wellesley Water Division (MWRA)
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 9 | 0 | ND |
2015 | ND | 12 | 0 | ND |
2016 | ND | 12 | 0 | ND |
2017 | ND | 12 | 0 | ND |
2018 | ND | 12 | 0 | ND |
2019 | ND | 11 | 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 | Result |
---|---|
2014-05-05 | ND |
2014-05-05 | ND |
2014-05-05 | ND |
2014-08-04 | ND |
2014-08-04 | ND |
2014-08-04 | ND |
2014-11-06 | ND |
2014-11-06 | ND |
2014-11-06 | ND |
2015-03-11 | ND |
2015-03-11 | ND |
2015-03-11 | ND |
2015-05-06 | ND |
2015-05-06 | ND |
2015-05-06 | ND |
2015-08-06 | ND |
2015-08-06 | ND |
2015-08-06 | ND |
2015-11-05 | ND |
2015-11-05 | ND |
2015-11-05 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-03-08 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-08-03 | ND |
2016-08-03 | ND |
2016-08-03 | ND |
2016-11-03 | ND |
2016-11-03 | ND |
2016-11-03 | ND |
2017-02-01 | ND |
2017-02-01 | ND |
2017-02-01 | ND |
2017-05-03 | ND |
2017-05-03 | ND |
2017-05-03 | ND |
2017-08-29 | ND |
2017-08-29 | ND |
2017-08-29 | ND |
2017-11-06 | ND |
2017-11-06 | ND |
2017-11-06 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-05-03 | ND |
2018-05-03 | ND |
2018-05-03 | ND |
2018-08-01 | ND |
2018-08-01 | ND |
2018-08-01 | ND |
2018-11-01 | ND |
2018-11-01 | ND |
2018-11-01 | ND |
2019-02-04 | ND |
2019-02-04 | ND |
2019-02-04 | ND |
2019-05-01 | ND |
2019-05-01 | ND |
2019-08-02 | ND |
2019-08-02 | ND |
2019-08-02 | ND |
2019-11-07 | ND |
2019-11-07 | ND |
2019-11-07 | ND |