trans-1,2-Dichloroethylene
Thirsty Water Corporation
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 1 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 2 | 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 |
---|---|---|
2014-02-03 | 039366.001 | ND |
2015-01-26 | 052805.002 | ND |
2016-03-29 | SDWA-1015520-00 | ND |
2016-09-26 | SDWA-1072981-00 | ND |
2016-12-05 | SDWA-1106683-00 | ND |
2017-03-14 | SDWA-1136514-00 | ND |
2017-04-24 | SDWA-1150929-00 | ND |
2017-09-11 | SDWA-1191904-00 | ND |
2017-11-27 | SDWA-1214342-00 | ND |
2018-01-16 | SDWA-1228181-00 | ND |
2018-03-12 | SDWA-1244308-00 | ND |
2019-01-29 | SDWA-1340722-00 | ND |