trans-1,2-Dichloroethylene
Montgomery Trace Water System
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 | 1 | 0 | ND |
2015 | ND | 5 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | ND | 7 | 0 | ND |
2019 | ND | 7 | 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 |
---|---|---|
2014-06-25 | AC58039 | ND |
2015-03-31 | AC86777 | ND |
2015-03-31 | AC86797 | ND |
2015-03-31 | AC86757 | ND |
2015-05-29 | AC93869 | ND |
2015-05-29 | AC93865 | ND |
2016-01-11 | AD17344 | ND |
2016-01-11 | AD17336 | ND |
2016-01-11 | AD17340 | ND |
2016-01-11 | AD17356 | ND |
2016-01-11 | AD17354 | ND |
2017-01-23 | AD66118 | ND |
2017-01-23 | AD66116 | ND |
2017-01-23 | AD66100 | ND |
2017-01-23 | AD66110 | ND |
2017-01-23 | AD66120 | ND |
2018-02-20 | AE14431 | ND |
2018-02-20 | AE14437 | ND |
2018-02-20 | AE14439 | ND |
2018-02-20 | AE14441 | ND |
2018-02-20 | AE14435 | ND |
2018-09-11 | AE39610 | ND |
2018-11-05 | AE45253 | ND |
2019-01-16 | AE50130 | ND |
2019-01-16 | AE50174 | ND |
2019-01-16 | AE50172 | ND |
2019-01-16 | AE50146 | ND |
2019-01-16 | AE50134 | ND |
2019-01-16 | AE50138 | ND |
2019-04-16 | AE62574 | ND |