trans-1,2-Dichloroethylene
Kimzey Regional Water District
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 | 2 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-03-17 | 14079002301 | ND |
| 2014-11-17 | 14324002501 | ND |
| 2015-01-26 | 15029005201 | ND |
| 2015-10-07 | 15282003501 | ND |
| 2016-01-07 | 16008011909 | ND |
| 2016-01-25 | 16028002509 | ND |
| 2016-11-22 | 16327002701 | ND |
| 2017-01-03 | 17005010801 | ND |
| 2017-10-02 | 17278007901 | ND |
| 2018-01-23 | 18025001601 | ND |
| 2018-10-03 | 18277014001 | ND |
| 2019-01-08 | 19010004909 | ND |
| 2019-10-03 | 19277000901 | ND |
| 2019-11-18 | 19324000101 | ND |