trans-1,2-Dichloroethylene
Choice Water Supply Corporation
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 | 1 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 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 |
---|---|---|
2014-09-02 | Q1440966001 | ND |
2015-07-30 | Q1529716001 | ND |
2015-07-30 | Q1529716003 | ND |
2016-09-13 | Q1637145001 | ND |
2016-09-13 | Q1637145003 | ND |
2017-11-03 | Q1756823006 | ND |
2017-11-03 | Q1756823001 | ND |
2018-09-25 | Q1838495002 | ND |
2018-12-11 | Q1850671006 | ND |
2019-03-14 | Q1910905004 | ND |
2019-06-17 | Q1936817002 | ND |
2019-06-17 | Q1936817004 | ND |