trans-1,2-Dichloroethylene
Altoona 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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-08-07 | 4H07065-01 | ND |
| 2014-08-07 | 4H07067-01 | ND |
| 2014-08-08 | 4H08030-01 | ND |
| 2014-08-08 | 4H08045-01 | ND |
| 2014-08-08 | 4H08031-01 | ND |
| 2014-08-08 | 4H08044-01 | ND |
| 2015-07-22 | 13058948 | ND |
| 2015-07-22 | 13058969 | ND |
| 2015-07-22 | 13058990 | ND |
| 2015-07-22 | 13059053 | ND |
| 2015-07-22 | 13059011 | ND |
| 2015-07-22 | 13059032 | ND |
| 2016-07-13 | 14631775 | ND |
| 2016-07-13 | 14631821 | ND |
| 2016-07-13 | 14631798 | ND |
| 2016-07-13 | 14631752 | ND |
| 2016-07-14 | 14632187 | ND |
| 2017-02-14 | 15705266 | ND |
| 2017-08-08 | 16624634 | ND |
| 2017-08-08 | 16624613 | ND |
| 2017-08-08 | 16624655 | ND |
| 2017-08-08 | 16624676 | ND |
| 2017-08-16 | 16624713 | ND |
| 2018-08-28 | 8H28047-01 | ND |
| 2018-08-28 | 8H28031-01 | ND |
| 2018-08-28 | 8H28032-01 | ND |
| 2018-08-28 | 8H28051-01 | ND |
| 2018-08-28 | 8H28044-01 | ND |
| 2018-08-28 | 8H28046-01 | ND |
| 2019-11-06 | 9K07058-03 | ND |
| 2019-11-06 | 9K07058-01 | ND |
| 2019-11-07 | 9K07074-01 | ND |
| 2019-11-07 | 9K07072-01 | ND |
| 2019-12-05 | 9L05126-01 | ND |