trans-1,2-Dichloroethylene
Lake Hemet-garner Valley
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 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 5 | 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 |
---|---|---|
2017-11-14 | 3761-010-1015 | ND |
2017-12-21 | 3761-009-0900 | ND |
2018-02-13 | 3761-004-0950 | ND |
2018-05-08 | 3761-004-0850 | ND |
2019-03-14 | 3761-001-1125 | ND |
2019-04-09 | 3761-004-1130 | ND |
2019-04-09 | 3761-010-1210 | ND |
2019-06-25 | 3761-003-0915 | ND |
2019-08-27 | 3761-002-0855 | ND |