trans-1,2-Dichloroethylene
Hudson Water Department
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 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 |
|---|---|---|
| 2014-12-18 | 1412-01126-001 | ND |
| 2014-12-18 | 1412-01128-001 | ND |
| 2015-12-02 | 1512-00381-001 | ND |
| 2015-12-14 | 1512-01282-001 | ND |
| 2016-12-28 | 1612-02149-001 | ND |
| 2016-12-28 | 1612-02154-001 | ND |
| 2017-11-30 | 1712-00025-001 | ND |
| 2017-12-13 | 1712-01417-001 | ND |
| 2017-12-13 | 1712-01420-001 | ND |
| 2018-10-24 | 118102585.01 | ND |
| 2018-10-24 | 118102587.01 | ND |
| 2018-12-17 | 118121517.01 | ND |
| 2019-10-23 | 119102712.01 | ND |
| 2019-10-23 | 119102716.01 | ND |
| 2019-12-20 | 119121670.01 | ND |