trans-1,2-Dichloroethylene
Eau Claire 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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-07-21 | 804376 | ND |
| 2015-07-16 | 871767 | ND |
| 2016-07-26 | 935390 | ND |
| 2016-09-01 | 942711 | ND |
| 2016-11-03 | 957173 | ND |
| 2017-02-21 | 974479 | ND |
| 2017-05-09 | 987395 | ND |
| 2017-07-11 | 1002950 | ND |
| 2017-10-24 | 1026050 | ND |
| 2018-03-14 | 1045099 | ND |
| 2018-05-08 | 1054395 | ND |
| 2018-08-29 | 1077023 | ND |
| 2018-12-12 | 1097339 | ND |
| 2019-02-13 | 1104865 | ND |
| 2019-04-22 | 1116666 | ND |
| 2019-07-16 | 1134673 | ND |