trans-1,2-Dichloroethylene
Lexington Park
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 | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 12 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-04-30 | 0180007_01_00480 | ND |
| 2015-08-17 | E16000638001 | ND |
| 2016-08-25 | E17000822003 | ND |
| 2016-08-25 | E17000822001 | ND |
| 2016-08-25 | E17000823003 | ND |
| 2016-08-31 | E17000930003 | ND |
| 2016-08-31 | E17000930001 | ND |
| 2016-08-31 | E17000914006 | ND |
| 2016-09-21 | E17001334001 | ND |
| 2016-09-21 | E17001289001 | ND |
| 2016-09-21 | E17001281001 | ND |
| 2016-09-21 | E17001293003 | ND |
| 2016-09-21 | E17001285003 | ND |
| 2016-09-26 | E17001366001 | ND |
| 2017-07-05 | E18000030006 | ND |
| 2019-09-23 | E20001187001 | ND |
| 2019-09-23 | E20001189001 | ND |