trans-1,2-Dichloroethylene
City of Waxahachie
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 | 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 |
|---|---|---|
| 2014-03-19 | Q1408832010 | ND |
| 2014-06-04 | Q1419411005 | ND |
| 2014-07-31 | Q1432876007 | ND |
| 2015-04-27 | Q1515456001 | ND |
| 2015-07-23 | Q1528705001 | ND |
| 2016-01-21 | Q1602735001 | ND |
| 2016-09-01 | Q1635064002 | ND |
| 2017-04-12 | Q1715005008 | ND |
| 2017-07-10 | Q1727841006 | ND |
| 2018-01-25 | Q1802982010 | ND |
| 2018-08-13 | Q1832216003 | ND |
| 2019-04-29 | Q1916965011 | ND |
| 2019-07-25 | Q1947719001 | ND |