trans-1,2-Dichloroethylene
Wailuku
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 | 11 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 11 | 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 |
|---|---|---|
| 2014-02-21 | 201402260433 | ND |
| 2014-02-24 | 201402260728 | ND |
| 2014-02-24 | 201402260912 | ND |
| 2014-02-24 | 201402260878 | ND |
| 2014-02-25 | 201402280114 | ND |
| 2014-02-25 | 201402280305 | ND |
| 2014-03-19 | 201403210381 | ND |
| 2014-03-19 | 201403210383 | ND |
| 2014-03-19 | 201403210385 | ND |
| 2014-03-24 | 201403260368 | ND |
| 2014-03-27 | 201403290120 | ND |
| 2015-01-26 | 201501280741 | ND |
| 2015-01-26 | 201501280753 | ND |
| 2015-01-26 | 201501280752 | ND |
| 2015-01-26 | 201501280565 | ND |
| 2015-06-16 | 201506180519 | ND |
| 2015-09-08 | 201509100855 | ND |
| 2016-02-23 | ND | |
| 2016-02-26 | ND | |
| 2016-02-26 | ND | |
| 2016-02-26 | ND | |
| 2016-09-12 | ND | |
| 2016-11-30 | ND | |
| 2016-11-30 | ND | |
| 2017-01-31 | ND | |
| 2017-01-31 | ND | |
| 2017-01-31 | ND | |
| 2017-02-24 | ND | |
| 2017-02-24 | ND | |
| 2017-02-27 | ND | |
| 2017-02-27 | ND | |
| 2017-02-27 | ND | |
| 2017-05-19 | ND | |
| 2017-05-19 | ND | |
| 2017-09-21 | ND | |
| 2018-01-30 | 201801030999 | ND |
| 2018-01-31 | 201801030998 | ND |
| 2018-01-31 | 201801031000 | ND |
| 2018-05-17 | 201805180453 | ND |
| 2019-02-04 | 201902050178 | ND |
| 2019-03-07 | 201903120187 | ND |