trans-1,2-Dichloroethylene
Lca Wlsa Central Division
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 | 13 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 11 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-03-05 | 14022333-01 | ND |
| 2014-03-05 | 14022333-06 | ND |
| 2014-03-05 | 14022333-05 | ND |
| 2014-03-05 | 14022333-04 | ND |
| 2014-03-05 | 14022333-02 | ND |
| 2014-03-05 | 14022333-03 | ND |
| 2014-03-12 | 14030864-03 | ND |
| 2014-03-12 | 14030864-04 | ND |
| 2014-03-12 | 14030864-05 | ND |
| 2014-03-12 | 14030864-06 | ND |
| 2014-03-12 | 14030864-02 | ND |
| 2014-03-12 | 14030864-01 | ND |
| 2014-03-26 | 14032553-01 | ND |
| 2015-02-04 | 12435990 | ND |
| 2015-02-19 | 12436013 | ND |
| 2015-02-19 | 12436036 | ND |
| 2015-03-18 | 12550674 | ND |
| 2016-06-21 | 14455954 | ND |
| 2016-08-18 | 14786691 | ND |
| 2016-08-18 | 14786662 | ND |
| 2017-07-10 | 16459221 | ND |
| 2017-07-10 | 16459263 | ND |
| 2017-07-10 | 16459242 | ND |
| 2017-07-20 | 16613957 | ND |
| 2017-07-20 | 16613806 | ND |
| 2017-07-20 | 16613908 | ND |
| 2017-07-26 | 16613857 | ND |
| 2017-07-27 | 16614039 | ND |
| 2017-08-01 | 16613729 | ND |
| 2017-08-10 | 16614093 | ND |
| 2017-08-29 | 16772994 | ND |
| 2018-03-16 | 8032172-01 | ND |
| 2018-08-23 | 8074081-07 | ND |
| 2018-08-23 | 8074081-02 | ND |
| 2018-08-23 | 8074081-05 | ND |
| 2019-07-11 | 9072953-01 | ND |
| 2019-08-08 | 9076334-01 | ND |
| 2019-08-22 | 9076420-02 | ND |
| 2019-09-16 | 9076421-02 | ND |