trans-1,2-Dichloroethylene
Quail Valley Utility District
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 1 | 0 | ND |
2015 | ND | 7 | 0 | ND |
2016 | ND | 3 | 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 |
---|---|---|
2014-05-21 | Q1417154001 | ND |
2015-05-14 | AC92055 | ND |
2015-05-14 | AC92057 | ND |
2015-05-14 | AC92061 | ND |
2015-09-24 | AD08514 | ND |
2015-09-24 | AD08496 | ND |
2015-12-10 | AD16510 | ND |
2015-12-10 | AD16594 | ND |
2016-04-26 | AD34210 | ND |
2016-04-26 | AD34204 | ND |
2016-04-26 | AD34198 | ND |
2017-03-29 | AD77452 | ND |
2017-03-29 | AD77456 | ND |
2017-03-29 | AD77454 | ND |
2018-02-28 | AE16061 | ND |
2018-05-29 | AE27914 | ND |
2018-05-29 | AE27906 | ND |
2019-03-13 | AE58247 | ND |
2019-03-13 | AE58243 | ND |
2019-03-13 | AE58241 | ND |