trans-1,2-Dichloroethylene
Hoke Landing S/d
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 | N/A | 0 | 0 | N/A |
2015 | ND | 8 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2015-01-22 | ND | |
2015-01-22 | ND | |
2015-04-10 | ND | |
2015-04-10 | ND | |
2015-07-29 | ND | |
2015-07-29 | ND | |
2015-10-01 | ND | |
2015-10-05 | ND | |
2016-01-08 | C515957-01 | ND |
2016-04-15 | CZ03278-01 | ND |
2016-07-25 | CZ08387-01 | ND |
2016-10-14 | CZ13793-01 | ND |
2016-10-24 | CZ16017-01 | ND |
2017-01-17 | CZ18812-01 | ND |
2017-10-16 | CA13267-01 | ND |