trans-1,2-Dichloroethylene
Dogwood Hills
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 4 | 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 |
|---|---|---|
| 2015-08-19 | AD04695 | ND |
| 2015-09-28 | AD08768 | ND |
| 2015-09-28 | AD08738 | ND |
| 2016-03-30 | AD31166 | ND |
| 2016-03-30 | AD31190 | ND |
| 2016-03-30 | AD31164 | ND |
| 2016-06-15 | AD40760 | ND |
| 2017-09-08 | AD95455 | ND |
| 2017-09-08 | AD95449 | ND |
| 2017-09-08 | AD95445 | ND |
| 2018-03-20 | AE19092 | ND |
| 2018-03-20 | AE19094 | ND |
| 2018-03-20 | AE19086 | ND |
| 2019-11-07 | AE88911 | ND |
| 2019-11-07 | AE88915 | ND |
| 2019-11-07 | AE88909 | ND |