trans-1,2-Dichloroethylene
Strong Waterworks
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 | 3 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 6 | 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 |
|---|---|---|
| 2014-01-14 | 14016010901 | ND |
| 2015-03-10 | 15071002401 | ND |
| 2015-07-14 | 15197005801 | ND |
| 2015-10-15 | 15289010401 | ND |
| 2016-01-13 | 16015008601 | ND |
| 2017-02-27 | 17060000401 | ND |
| 2018-02-27 | 18060003401 | ND |
| 2018-05-01 | 18123007101 | ND |
| 2018-09-17 | 18263004501 | ND |
| 2018-09-17 | 18263004401 | ND |
| 2018-10-29 | 18305001401 | ND |
| 2018-11-26 | 18333002201 | ND |
| 2019-02-11 | 19045009701 | ND |