trans-1,2-Dichloroethylene
Guymon
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 | 9 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-03-11 | 06545 | ND |
| 2014-05-14 | 06877 | ND |
| 2015-05-20 | 055011.001 | ND |
| 2015-08-12 | 060979.004 | ND |
| 2015-08-12 | 060979.003 | ND |
| 2015-08-12 | 060979.002 | ND |
| 2015-08-12 | 060979.001 | ND |
| 2015-09-01 | 063100.003 | ND |
| 2015-09-01 | 063100.004 | ND |
| 2015-09-01 | 063100.002 | ND |
| 2015-09-01 | 063100.001 | ND |
| 2016-09-20 | SDWA-1072180-00 | ND |
| 2017-09-12 | SDWA-1192010-00 | ND |
| 2018-01-09 | SDWA-1226132-00 | ND |
| 2019-08-20 | BH20077-01 | ND |
| 2019-11-04 | BK05134-01 | ND |
| 2019-11-04 | BK05134-03 | ND |
| 2019-11-04 | BK05134-02 | ND |