trans-1,2-Dichloroethylene
Amawalk-shenorock Water District
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-03-10 | 420-75590-3 POC | ND |
| 2014-03-10 | 420-75590-4 POC | ND |
| 2014-03-10 | 420-75590-1 POC | ND |
| 2014-03-10 | 420-75590-2 POC | ND |
| 2016-03-09 | 420-101678-4 POC | ND |
| 2016-03-09 | 420-101678-1 POC | ND |
| 2016-03-09 | 420-101678-2 POC | ND |
| 2016-03-09 | 420-101678-3 POC | ND |
| 2017-02-28 | 420-117562-2-POC | ND |
| 2017-02-28 | 420-117562-4-POC | ND |
| 2017-02-28 | 420-117562-1-POC | ND |
| 2017-02-28 | 420-117562-3-POC | ND |
| 2018-02-12 | 420-132804-1-POC | ND |
| 2018-02-12 | 420-132804-3-POC | ND |
| 2018-02-12 | 420-132804-2-POC | ND |
| 2018-02-12 | 420-132804-4-POC | ND |
| 2019-02-27 | 420-150071-3 POC | ND |
| 2019-02-27 | 420-150071-1 POC | ND |
| 2019-02-27 | 420-150071-2 POC | ND |
| 2019-02-27 | 420-150071-4 POC | ND |