trans-1,2-Dichloroethylene
Chippewa Falls 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 | 5 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-03-04 | 772834 | ND |
| 2014-03-04 | 772837 | ND |
| 2014-05-20 | 790678 | ND |
| 2014-08-11 | 809553 | ND |
| 2014-12-02 | 833622 | ND |
| 2015-02-10 | 842764 | ND |
| 2015-02-10 | 842766 | ND |
| 2015-05-20 | 860888 | ND |
| 2015-09-15 | 883126 | ND |
| 2015-11-03 | 892525 | ND |
| 2016-02-10 | 905009 | ND |
| 2016-02-10 | 905011 | ND |
| 2016-06-06 | 924846 | ND |
| 2016-08-09 | 938104 | ND |
| 2016-11-09 | 958363 | ND |
| 2017-01-24 | 971010 | ND |
| 2017-05-02 | 986303 | ND |
| 2017-05-02 | 986306 | ND |
| 2017-07-26 | 1006848 | ND |
| 2017-11-14 | 1029622 | ND |
| 2018-04-30 | 1052422 | ND |
| 2019-03-12 | 1109108 | ND |