trans-1,2-Dichloroethylene
City of Hewitt
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 1 | 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 |
---|---|---|
2014-01-14 | AC38665 | ND |
2015-03-23 | AC85655 | ND |
2015-03-23 | AC85645 | ND |
2015-03-23 | AC85649 | ND |
2016-01-20 | AD19002 | ND |
2016-01-20 | AD19012 | ND |
2016-04-06 | AD32129 | ND |
2017-04-03 | AD78087 | ND |
2017-10-09 | AD99814 | ND |
2017-10-31 | AE03236 | ND |
2018-02-07 | AE12765 | ND |
2018-04-19 | AE23265 | ND |
2018-04-19 | AE23263 | ND |
2019-02-12 | AE54094 | ND |
2019-02-12 | AE54098 | ND |
2019-02-12 | AE54084 | ND |