trans-1,2-Dichloroethylene
Tryon Road Special Utility District
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 | ND | 2 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2015-11-24 | Q1546818002 | ND |
2015-11-24 | Q1546818003 | ND |
2016-11-09 | Q1648803007 | ND |
2016-11-09 | Q1648803010 | ND |
2016-11-09 | Q1648803012 | ND |
2017-08-10 | Q1734515009 | ND |
2017-08-10 | Q1734515011 | ND |
2017-08-10 | Q1734515012 | ND |
2018-11-28 | Q1848464002 | ND |
2018-11-28 | Q1848464003 | ND |
2018-11-28 | Q1848464005 | ND |
2019-03-21 | Q1911930002 | ND |
2019-03-21 | Q1911930012 | ND |
2019-03-21 | Q1911930005 | ND |