trans-1,2-Dichloroethylene
City of Midlothian
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 3 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 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 |
---|---|---|
2014-03-11 | Q1407651002 | ND |
2014-06-04 | Q1419409005 | ND |
2014-07-30 | Q1432468007 | ND |
2015-03-19 | Q1510436010 | ND |
2015-07-22 | Q1528429002 | ND |
2016-05-18 | Q1619797001 | ND |
2016-09-02 | Q1635531002 | ND |
2017-07-11 | Q1728156006 | ND |
2017-09-28 | Q1747556002 | ND |
2018-01-25 | Q1802981014 | ND |
2018-08-31 | Q1835160001 | ND |
2019-02-12 | Q1906277003 | ND |
2019-07-25 | Q1947718001 | ND |