trans-1,2-Dichloroethylene
Aqua Pa Perkiomen Township
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 | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 5 | 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 |
|---|---|---|
| 2014-02-04 | AE22408 | ND |
| 2014-02-05 | AE22411 | ND |
| 2014-02-19 | AE23934 | ND |
| 2014-02-19 | AE23933 | ND |
| 2014-02-19 | AE23939 | ND |
| 2015-02-03 | 12404369 | ND |
| 2015-02-03 | 12404390 | ND |
| 2015-02-03 | 12404411 | ND |
| 2015-02-03 | 12404432 | ND |
| 2015-02-03 | 12404453 | ND |
| 2016-01-20 | 13755356 | ND |
| 2016-01-20 | 13755398 | ND |
| 2016-01-20 | 13755377 | ND |
| 2016-01-20 | 13755314 | ND |
| 2016-01-20 | 13755335 | ND |
| 2017-02-21 | 15658852 | ND |
| 2017-03-28 | 15799034 | ND |
| 2017-04-19 | 15941133 | ND |
| 2017-06-21 | 16260407 | ND |
| 2017-12-20 | 17165026 | ND |
| 2018-02-27 | AF76926 | ND |
| 2018-02-27 | AF76923 | ND |
| 2018-02-27 | AF76925 | ND |
| 2018-02-27 | AF76922 | ND |
| 2018-07-19 | AF90332 | ND |
| 2019-04-24 | AG14547 | ND |
| 2019-04-24 | AG14545 | ND |
| 2019-04-24 | AG14549 | ND |
| 2019-04-24 | AG14552 | ND |
| 2019-05-08 | AG17044 | ND |