trans-1,2-Dichloroethylene
Old Forty West Motel
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2016-12-20 | 201612220441 | ND |
| 2016-12-20 | 201612220439 | ND |
| 2017-06-12 | A7F1282-01 | ND |
| 2017-08-30 | A7H3451-02 | ND |
| 2017-10-10 | A7J1422-02 | ND |
| 2017-10-10 | A7J1413-02 | ND |
| 2018-03-01 | A8C0506-01 | ND |
| 2019-03-19 | A9C2286-01A | ND |
| 2019-04-09 | A9D1608-01 | ND |
| 2019-05-21 | A9E3123-01 | ND |
| 2019-07-15 | A9G2613-01A | ND |
| 2019-12-18 | A9L2299-01 | ND |