trans-1,2-Dichloroethylene
South Middleton Twp Water Authority
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 | 3 | 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 |
|---|---|---|
| 2014-02-17 | 14021713-002 | ND |
| 2014-02-17 | 14021713-003 | ND |
| 2014-02-17 | 14021713-001 | ND |
| 2015-02-16 | 12479776 | ND |
| 2015-02-16 | 12479809 | ND |
| 2015-02-16 | 12479842 | ND |
| 2016-05-16 | 14360361 | ND |
| 2016-05-16 | 14360385 | ND |
| 2016-05-16 | 14360336 | ND |
| 2017-05-16 | 16209359 | ND |
| 2017-05-16 | 16209382 | ND |
| 2017-05-16 | 16209336 | ND |
| 2018-05-15 | 8052993-01 | ND |
| 2018-05-15 | 8052993-02 | ND |
| 2018-05-15 | 8052993-03 | ND |
| 2019-05-14 | 9052836-01 | ND |
| 2019-05-14 | 9052836-02 | ND |
| 2019-05-14 | 9052836-03 | ND |