trans-1,2-Dichloroethylene
Freedom 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
2015 | ND | 5 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 2 | 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 |
---|---|---|
2014-01-20 | 0060002_01_10681 | ND |
2014-08-06 | 0060002_01_00550 | ND |
2015-04-27 | 2067373001 | ND |
2015-06-11 | E15003916006 | ND |
2015-08-31 | E16000843001 | ND |
2015-12-21 | 21148690011 | ND |
2015-12-21 | 21148700011 | ND |
2016-02-17 | E16002977008 | ND |
2016-05-15 | 2124305001 | ND |
2017-02-13 | 2208108001 | ND |
2017-05-31 | E17004688001 | ND |
2017-10-02 | 2266147001 | ND |
2018-01-22 | 18A1054-01 | ND |
2018-07-09 | 18G0572-01 | ND |
2019-07-29 | E20000379008 | ND |