trans-1,2-Dichloroethylene
North Slope Borough - Anaktuvuk Pass
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 | 1 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2014-07-29 | VO*F1407236-01A | ND |
2015-03-18 | VO*3210051 | ND |
2015-05-04 | VO*3236239 | ND |
2015-09-21 | VO*3329341 | ND |
2015-10-13 | VO*3341327 | ND |
2016-01-05 | VO*3383217 | ND |
2016-04-13 | VO*3431589 | ND |
2016-07-13 | VO*3496942 | ND |
2017-08-11 | VO*3758268 | ND |
2018-12-31 | 4164494 | ND |
2019-02-20 | 4206706 | ND |