trans-1,2-Dichloroethylene
North Kona
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 | 9 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-03-18 | C14-03-0113A | ND |
| 2014-03-18 | C14-03-0114A | ND |
| 2014-03-18 | C14-03-0115A | ND |
| 2014-03-18 | C14-03-0116A | ND |
| 2014-03-18 | C14-03-0117A | ND |
| 2014-03-18 | C14-03-0118A | ND |
| 2014-03-18 | C14-03-0119A | ND |
| 2014-03-18 | C14-03-0120A | ND |
| 2014-03-18 | C14-03-0112A | ND |
| 2015-07-20 | C15-07-0346A | ND |
| 2015-08-19 | 201508150137 | ND |
| 2015-11-18 | 201508150170 | ND |
| 2016-03-09 | ND | |
| 2016-04-04 | ND | |
| 2017-03-14 | ND | |
| 2017-03-14 | ND | |
| 2017-03-14 | ND | |
| 2017-03-14 | ND | |
| 2017-03-14 | ND | |
| 2017-03-14 | ND | |
| 2017-09-11 | ND | |
| 2017-09-11 | ND | |
| 2018-08-13 | 201808151089 | ND |
| 2018-11-27 | 201811300217 | ND |
| 2018-12-03 | C18-12-0009A | ND |
| 2018-12-03 | C18-12-0010A | ND |
| 2019-04-15 | C19-04-0100A | ND |
| 2019-09-09 | 201909100461 | ND |