trans-1,2-Dichloroethylene
Bethel 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.
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 | 3 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 5 | 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 |
---|---|---|
2014-07-15 | 188551CH | ND |
2014-07-15 | 188550CH | ND |
2015-03-03 | 194668CH | ND |
2015-03-03 | 194670CH | ND |
2016-02-09 | 205073CH | ND |
2016-02-09 | 205075CH | ND |
2016-05-12 | 208037GE | ND |
2017-09-13 | 304907GE | ND |
2017-09-13 | 304908GE | ND |
2017-11-20 | 307165GE | ND |
2018-03-01 | 309832GE | ND |
2018-03-01 | 309833GE | ND |
2018-03-01 | 309834GE | ND |
2018-04-17 | 311175GE | ND |
2018-07-03 | 313822GE | ND |
2019-01-29 | 320479GE | ND |
2019-01-29 | 320491GE | ND |
2019-01-29 | 320484GE | ND |