trans-1,2-Dichloroethylene
California Water Service Company - Dixon
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 | 5 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 3 | 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 |
---|---|---|
2014-01-30 | 5701-007-1026 | ND |
2014-02-18 | 5701-008-1150 | ND |
2014-05-20 | 5701-017-1417 | ND |
2014-12-03 | 5701-002-1405 | ND |
2014-12-30 | 5810-004-1430 | ND |
2015-02-18 | 5701-006-0900 | ND |
2016-03-16 | 5701-002-1035 | ND |
2016-05-19 | 5701-017-1025 | ND |
2016-06-13 | 9590-020-1700 | ND |
2016-12-07 | 5810-002-1347 | ND |
2017-01-30 | 5701-002-0919 | ND |
2017-02-28 | 5701-008-0951 | ND |
2017-05-03 | 5701-017-1505 | ND |
2018-05-08 | 5701-017-1434 | ND |
2019-05-20 | 5701-017-1054 | ND |