trans-1,2-Dichloroethylene
Town of Poolesville
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 | 5 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-07-22 | 0150002_03_00300 | ND |
2014-07-22 | 0150002_05_00300 | ND |
2014-07-22 | 0150002_06_00300 | ND |
2014-07-22 | 0150002_12_00300 | ND |
2014-07-22 | 0150002_13_00300 | ND |
2015-12-09 | E16002386001 | ND |
2016-07-13 | E17000144001 | ND |
2016-11-01 | E17001957001 | ND |
2017-06-13 | E17004914001 | ND |
2017-06-13 | E17004914004 | ND |
2017-06-13 | E17004914007 | ND |
2017-06-13 | E17004914008 | ND |
2017-06-13 | E17004914010 | ND |
2019-07-02 | E20000017006 | ND |
2019-07-02 | E20000017004 | ND |
2019-07-02 | E20000017001 | ND |