trans-1,2-Dichloroethylene
Dean 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 | 4 | 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 |
---|---|---|
2014-12-19 | Q1460754007 | ND |
2015-07-02 | AC98352 | ND |
2015-12-02 | Q1547859006 | ND |
2015-12-02 | Q1547859003 | ND |
2015-12-02 | Q1547859002 | ND |
2016-10-17 | Q1644288006 | ND |
2016-10-17 | Q1644288003 | ND |
2016-10-17 | Q1644288002 | ND |
2017-08-30 | Q1739978013 | ND |
2017-08-30 | Q1739978021 | ND |
2017-08-30 | Q1739978016 | ND |
2018-08-01 | Q1830513008 | ND |
2018-08-01 | Q1830513002 | ND |
2018-08-01 | Q1830513006 | ND |
2019-08-08 | Q1952672002 | ND |
2019-08-08 | Q1952672006 | ND |
2019-08-08 | Q1952672004 | ND |