trans-1,2-Dichloroethylene
City of Florence
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 | 2 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 9 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2014-05-27 | AD40317 | ND |
2014-05-27 | AD40319 | ND |
2015-03-17 | AD53072 | ND |
2016-03-29 | AD73324 | ND |
2016-03-29 | AD73326 | ND |
2016-03-29 | AD73329 | ND |
2016-03-29 | AD73328 | ND |
2016-03-29 | AD73331 | ND |
2016-03-29 | AD73330 | ND |
2016-03-29 | AD73332 | ND |
2016-05-26 | AD76536 | ND |
2016-05-26 | AD76537 | ND |
2017-02-01 | AD89158 | ND |
2018-01-30 | AE06829 | ND |
2019-01-15 | AE24119 | ND |