trans-1,2-Dichloroethylene
Cottage Grove
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 | 6 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 3 | 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 |
|---|---|---|
| 2014-03-20 | 14C0911-01 | ND |
| 2014-05-21 | 14E2435-01 | ND |
| 2014-07-30 | 14G2400-01 | ND |
| 2014-07-30 | 14G2400-03 | ND |
| 2014-07-30 | 14G2400-04 | ND |
| 2014-07-30 | 14G2415-01 | ND |
| 2015-11-04 | 15K0287-01 | ND |
| 2015-11-04 | 15K0288-01 | ND |
| 2016-03-10 | 16C0532-01 | ND |
| 2016-03-10 | 16C0531-01 | ND |
| 2016-03-10 | 16C0530-01 | ND |
| 2016-03-10 | 16C0528-01 | ND |
| 2017-08-02 | 17H0166-01 | ND |
| 2017-08-02 | 17H0170-01 | ND |
| 2017-10-18 | 17J0968-04 | ND |
| 2018-03-14 | 18C0522-01 | ND |
| 2018-03-14 | 18C0523-02 | ND |
| 2018-08-23 | 18H2015-01 | ND |
| 2018-12-05 | 18L0187-01 | ND |
| 2019-02-14 | 19B0671-01 | ND |
| 2019-02-14 | 19B0673-01 | ND |
| 2019-05-28 | 19E2055-01 | ND |