trans-1,2-Dichloroethylene
San Fernando 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 | 3 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 5 | 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 |
---|---|---|
2014-01-22 | 9590-004-0840 | ND |
2014-01-22 | 9590-003-0950 | ND |
2014-01-22 | 9590-002-0905 | ND |
2015-01-21 | 9590-002-0820 | ND |
2015-01-21 | 9590-003-1015 | ND |
2015-01-21 | 9590-004-0905 | ND |
2016-02-17 | 9590-002-0920 | ND |
2016-02-17 | 9590-004-0900 | ND |
2016-04-13 | 9590-004-0820 | ND |
2017-01-25 | 9590-003-0855 | ND |
2017-01-25 | 9590-004-0800 | ND |
2017-01-25 | 9590-002-0715 | ND |
2017-04-05 | 9590-004-0920 | ND |
2017-10-24 | 9590-004-0715 | ND |
2018-01-24 | 9590-004-1055 | ND |
2018-01-24 | 9590-002-0900 | ND |
2018-06-06 | 9590-004-0905 | ND |
2018-07-11 | 9590-004-0855 | ND |
2019-01-11 | 9590-004-0925 | ND |
2019-01-11 | 9590-002-0900 | ND |