trans-1,2-Dichloroethylene
City of Lathrop
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 |
|---|---|---|---|---|
| 2012 | ND | 2 | 0 | ND |
| 2013 | ND | 2 | 0 | ND |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | 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 |
|---|---|---|
| 2012-04-02 | 5867-006-1332 | ND |
| 2012-04-02 | 5867-007-1317 | ND |
| 2013-04-01 | 5867-008-0943 | ND |
| 2013-04-10 | 5867-016-0922 | ND |
| 2014-04-01 | 1610-005-0905 | ND |
| 2015-04-07 | 1610-006-0832 | ND |
| 2015-04-07 | 1610-007-0854 | ND |
| 2016-04-05 | 9590-008-0908 | ND |
| 2016-04-19 | 9590-016-0808 | ND |
| 2017-04-03 | 9590-005-1012 | ND |