trans-1,2-Dichloroethylene
City of Levelland
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-07-02 | Q1425552009 | ND |
| 2014-07-02 | Q1425552010 | ND |
| 2015-04-09 | Q1513274003 | ND |
| 2015-07-16 | Q1527492002 | ND |
| 2016-01-12 | Q1600879007 | ND |
| 2016-01-12 | Q1600879010 | ND |
| 2016-12-15 | Q1654679005 | ND |
| 2017-01-10 | Q1701080007 | ND |
| 2017-04-26 | Q1716967002 | ND |
| 2017-06-15 | Q1725000002 | ND |
| 2017-09-06 | Q1741585006 | ND |
| 2018-04-04 | Q1813860001 | ND |
| 2018-04-04 | Q1813860007 | ND |
| 2019-01-08 | Q1900775017 | ND |
| 2019-01-08 | Q1900775001 | ND |
| 2019-12-03 | Q1978629004 | ND |