trans-1,2-Dichloroethylene
City of California City
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 5 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2014-08-25 | 5806-005-1400 | ND |
| 2014-08-25 | 5806-006-1320 | ND |
| 2014-08-25 | 5806-008-1345 | ND |
| 2014-08-25 | 5806-009-1310 | ND |
| 2014-08-25 | 5806-016-1335 | ND |
| 2016-12-15 | 5806-003-0920 | ND |
| 2017-08-01 | 5806-005-1100 | ND |
| 2017-08-01 | 5806-006-1135 | ND |
| 2017-08-01 | 5806-008-1000 | ND |
| 2017-08-01 | 5806-009-1030 | ND |
| 2017-08-01 | 5806-016-0925 | ND |
| 2019-11-19 | 5806-003-1000 | ND |