trans-1,2-Dichloroethylene
Residences On Main
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-03-25 | 776617 | ND |
| 2014-05-06 | 784266 | ND |
| 2014-08-20 | 812091 | ND |
| 2014-11-13 | 1411870-001A | ND |
| 2015-02-25 | 1502G32-001A | ND |
| 2015-06-18 | 1506H50-001A | ND |
| 2015-09-23 | 1509K05-001A | ND |
| 2015-12-14 | 1512B86-001A | ND |
| 2016-03-08 | 1603597-001A | ND |
| 2016-06-08 | 1606A35-001A | ND |
| 2016-09-19 | 1609D27-001A | ND |
| 2016-12-13 | 1612A07-001A | ND |
| 2017-03-15 | 1703944-001A | ND |
| 2017-06-20 | 1706G23-001A | ND |
| 2018-05-09 | 465737 | ND |
| 2019-09-16 | 1909D35-001A | ND |