trans-1,2-Dichloroethylene
Troy City PWS
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 | 5 | 0 | ND |
| 2015 | ND | 5 | 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 |
|---|---|---|
| 2014-01-08 | A140173039 | ND |
| 2014-04-02 | A140190816 | ND |
| 2014-07-03 | A140213728 | ND |
| 2014-07-10 | A140218038 | ND |
| 2014-10-01 | A140217352 | ND |
| 2015-01-07 | A150231600 | ND |
| 2015-04-08 | A150232308 | ND |
| 2015-07-08 | A150310870 | ND |
| 2015-09-24 | A150329519 | ND |
| 2015-10-14 | A150331652 | ND |
| 2016-01-14 | A160332052 | ND |
| 2016-04-06 | A160374793 | ND |
| 2016-07-06 | A160399412 | ND |
| 2016-11-10 | A160447288 | ND |
| 2017-01-12 | A170467789 | ND |
| 2017-04-06 | A170487427 | ND |
| 2017-07-06 | A170504554 | ND |
| 2017-10-19 | A170539928 | ND |
| 2018-01-11 | A180548409 | ND |
| 2018-04-12 | A180231604 | ND |
| 2018-07-12 | A180587717 | ND |
| 2018-10-17 | A180626733 | ND |
| 2019-01-09 | 9A01480-01 | ND |
| 2019-04-03 | 9D00552-01 | ND |
| 2019-07-10 | 9G01777-03 | ND |
| 2019-08-15 | 9H02441-01 | ND |