trans-1,2-Dichloroethylene
Liberty City Water Supply Corporation
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 | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-06-16 | Q1421358001 | ND |
| 2014-06-30 | Q1424517004 | ND |
| 2014-06-30 | Q1424517002 | ND |
| 2015-04-14 | Q1513785002 | ND |
| 2015-04-14 | Q1513785012 | ND |
| 2015-04-14 | Q1513785009 | ND |
| 2015-05-05 | Q1516377002 | ND |
| 2016-05-12 | Q1619065010 | ND |
| 2016-05-12 | Q1619065007 | ND |
| 2016-05-12 | Q1619065005 | ND |
| 2016-05-12 | Q1619065004 | ND |
| 2017-03-28 | Q1712865022 | ND |
| 2017-03-28 | Q1712865004 | ND |
| 2017-03-28 | Q1712865021 | ND |
| 2017-03-28 | Q1712865002 | ND |
| 2018-06-14 | Q1823909012 | ND |
| 2018-06-14 | Q1823909006 | ND |
| 2018-06-14 | Q1823909010 | ND |
| 2018-06-14 | Q1823909009 | ND |
| 2019-03-28 | Q1912649008 | ND |
| 2019-03-28 | Q1912649013 | ND |
| 2019-03-28 | Q1912649012 | ND |
| 2019-03-28 | Q1912649009 | ND |