trans-1,2-Dichloroethylene
Faribault
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 | 2 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | 0.0717 ppb | 6 | 2 | ND - 0.220 ppb |
| 2018 | ND | 1 | 0 | ND |
| 2019 | 0.120 ppb | 1 | 1 | 0.120 ppb |
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 |
|---|---|---|
| 2014-02-04 | 14B0136-01 | ND |
| 2014-04-22 | 14D1306-01 | ND |
| 2015-04-06 | 15D0292-01 | ND |
| 2016-03-14 | 3414132 | ND |
| 2017-02-22 | 17B1185-01 | ND |
| 2017-02-22 | 17B1189-01 | 0.220 ppb |
| 2017-02-22 | 17B1189-02 | ND |
| 2017-02-22 | 17B1189-03 | ND |
| 2017-02-22 | 17B1191-01 | ND |
| 2017-10-05 | 17J0335-01 | 0.210 ppb |
| 2018-04-09 | 18D0324-01 | ND |
| 2019-06-11 | 19F0776-01 | 0.120 ppb |