trans-1,2-Dichloroethylene
Sky Lakes Water Supply Corporation
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2015-04-29 | AC89874 | ND |
| 2015-04-29 | AC89876 | ND |
| 2016-07-12 | AD43884 | ND |
| 2016-07-12 | AD43866 | ND |
| 2017-04-11 | AD79226 | ND |
| 2017-04-11 | AD79224 | ND |
| 2017-09-26 | AD98027 | ND |
| 2017-11-14 | AE04753 | ND |
| 2018-01-09 | AE08411 | ND |
| 2018-01-09 | AE08351 | ND |
| 2018-04-10 | AE21888 | ND |
| 2018-07-31 | AE35102 | ND |
| 2018-10-23 | AE44310 | ND |
| 2019-02-27 | AE56273 | ND |
| 2019-02-27 | AE56281 | ND |
| 2019-05-01 | AE64373 | ND |
| 2019-07-23 | AE75575 | ND |
| 2019-10-31 | AE88166 | ND |