trans-1,2-Dichloroethylene
Parker Little River Water System
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 | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-01-09 | AI26220 | ND |
| 2014-04-08 | AI37323 | ND |
| 2014-07-09 | AI45160 | ND |
| 2014-10-07 | AI56845 | ND |
| 2015-01-23 | AI63333 | ND |
| 2015-04-10 | AI74597 | ND |
| 2015-07-10 | AI82489 | ND |
| 2015-10-12 | AI92660 | ND |
| 2016-02-10 | AJ06225 | ND |
| 2017-05-11 | AJ55238 | ND |
| 2018-02-12 | AJ83628 | ND |
| 2019-03-07 | AK12889 | ND |