trans-1,2-Dichloroethylene
Edina
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 | 0.0325 ppb | 4 | 1 | ND - 0.130 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | 0.0300 ppb | 5 | 1 | ND - 0.150 ppb |
| 2017 | ND | 1 | 0 | ND |
| 2018 | 0.0650 ppb | 2 | 1 | ND - 0.130 ppb |
| 2019 | 0.0457 ppb | 7 | 2 | ND - 0.200 ppb |
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 |
|---|---|---|
| 2014-08-20 | 14H1839-02 | ND |
| 2014-08-20 | 14H1839-04 | 0.130 ppb |
| 2014-08-20 | 14H1839-01 | ND |
| 2014-11-19 | 14K0831-01 | ND |
| 2016-04-11 | 3428699 | ND |
| 2016-04-11 | 3428678 | ND |
| 2016-04-11 | 3428662 | ND |
| 2016-04-11 | 3428612 | ND |
| 2016-12-14 | 16L0584-01 | 0.150 ppb |
| 2017-02-07 | 17B0347-01 | ND |
| 2018-03-14 | 18C0569-01 | 0.130 ppb |
| 2018-08-01 | 18H0091-02 | ND |
| 2019-03-28 | 19C1245-01 | ND |
| 2019-05-29 | 19E2109-01 | ND |
| 2019-08-05 | 19H0330-02 | ND |
| 2019-08-20 | 19H1758-02 | ND |
| 2019-10-10 | 19J0709-01 | ND |
| 2019-10-10 | 19J0709-04 | 0.120 ppb |
| 2019-10-10 | 19J0712-01 | 0.200 ppb |