trans-1,2-Dichloroethylene
Rio Waterworks
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 | 6 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 2 | 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 |
---|---|---|
2014-07-28 | 147663002 | ND |
2014-07-28 | 147663001 | ND |
2014-08-04 | 148747001 | ND |
2014-08-04 | 148748001 | ND |
2014-09-09 | 155868001 | ND |
2014-09-09 | 155866001 | ND |
2015-02-09 | 178688001 | ND |
2015-08-12 | 211381001 | ND |
2015-08-12 | 211382001 | ND |
2016-07-21 | 267709001 | ND |
2016-08-31 | 274996001 | ND |
2016-08-31 | 274994001 | ND |
2017-09-19 | 923296 | ND |
2017-09-19 | 923305 | ND |
2018-07-10 | 393175001 | ND |
2018-08-15 | 401207001 | ND |
2018-08-15 | 401204001 | ND |
2019-02-19 | 431942001 | ND |
2019-08-12 | 462739001 | ND |
2019-08-12 | 462737001 | ND |