trans-1,2-Dichloroethylene
City of Nixon
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 | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 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 |
|---|---|---|
| 2014-01-21 | AC39522 | ND |
| 2014-07-28 | AC61128 | ND |
| 2014-07-28 | AC61116 | ND |
| 2014-08-20 | AC64625 | ND |
| 2015-02-11 | AC80225 | ND |
| 2015-02-11 | AC80229 | ND |
| 2015-02-11 | AC80251 | ND |
| 2015-06-01 | AC93901 | ND |
| 2016-02-18 | AD24353 | ND |
| 2016-02-18 | AD24339 | ND |
| 2016-02-18 | AD24389 | ND |
| 2017-03-01 | AD73170 | ND |
| 2017-03-01 | AD73184 | ND |
| 2017-03-01 | AD73172 | ND |
| 2018-05-08 | AE25581 | ND |
| 2018-05-08 | AE25583 | ND |
| 2018-05-08 | AE25589 | ND |
| 2019-03-25 | AE59748 | ND |
| 2019-03-25 | AE59742 | ND |
| 2019-03-25 | AE59746 | ND |