trans-1,2-Dichloroethylene
Richland Township 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 | 6 | 0 | ND |
| 2016 | ND | 4 | 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 |
|---|---|---|
| 2014-05-15 | 14050658-02 | ND |
| 2014-05-15 | 14050658-01 | ND |
| 2014-09-25 | 14091904-01 | ND |
| 2015-02-10 | 12392461 | ND |
| 2015-04-23 | 12871979 | ND |
| 2015-04-23 | 12871980 | ND |
| 2015-06-09 | 12872164 | ND |
| 2015-09-28 | 13380553 | ND |
| 2015-12-08 | 13624273 | ND |
| 2016-02-16 | 13861558 | ND |
| 2016-03-15 | 13977447 | ND |
| 2016-04-12 | 14092306 | ND |
| 2016-04-12 | 14092285 | ND |
| 2017-09-11 | 16716492 | ND |
| 2017-09-11 | 16716515 | ND |
| 2017-09-11 | 16716465 | ND |
| 2018-10-15 | 8033560-01 | ND |
| 2018-10-15 | 8033560-02 | ND |
| 2018-10-15 | 8033560-03 | ND |
| 2019-10-07 | 9032226-01 | ND |
| 2019-10-07 | 9032226-02 | ND |
| 2019-10-07 | 9032226-03 | ND |