trans-1,2-Dichloroethylene
Mountain Home Air Force Base
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 | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-08-26 | V1433321 | ND |
| 2014-08-26 | V1433322 | ND |
| 2014-08-26 | V1433323 | ND |
| 2014-08-26 | V1433324 | ND |
| 2015-08-18 | V1534750 | ND |
| 2015-08-18 | V1534751 | ND |
| 2015-08-18 | V1534749 | ND |
| 2015-08-18 | V1534748 | ND |
| 2016-05-26 | V1622879 | ND |
| 2016-05-26 | V1622878 | ND |
| 2016-05-26 | V1622877 | ND |
| 2016-09-20 | V1643049 | ND |
| 2017-05-23 | V1721658 | ND |
| 2017-05-23 | V1721659 | ND |
| 2017-05-23 | V1721657 | ND |
| 2017-06-13 | V1725135 | ND |
| 2018-04-10 | V1815357 | ND |
| 2018-04-10 | V1815355 | ND |
| 2018-04-10 | V1815356 | ND |
| 2018-04-10 | V1815358 | ND |
| 2019-04-23 | V1918558 | ND |
| 2019-04-23 | V1918561 | ND |
| 2019-04-23 | V1918559 | ND |
| 2019-04-23 | V1918560 | ND |