trans-1,2-Dichloroethylene
Aqua Pa Superior Main System
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-10-02 | 2032470002 | ND |
| 2014-10-02 | 2032470001 | ND |
| 2014-10-02 | 2032470004 | ND |
| 2014-10-02 | 2032470005 | ND |
| 2014-10-02 | 2032470003 | ND |
| 2016-09-06 | 14913026 | ND |
| 2016-09-08 | 14912906 | ND |
| 2016-09-08 | 14912927 | ND |
| 2016-09-08 | 14912948 | ND |
| 2016-09-08 | 14912969 | ND |
| 2016-09-08 | 14912990 | ND |
| 2016-11-03 | 15230805 | ND |
| 2017-02-22 | 15660473 | ND |
| 2017-04-26 | 15942795 | ND |
| 2017-04-26 | 15942816 | ND |
| 2017-04-26 | 15942774 | ND |
| 2017-04-26 | 15942753 | ND |
| 2017-04-26 | 15942732 | ND |
| 2017-04-26 | 15942711 | ND |
| 2017-08-10 | 16571413 | ND |
| 2018-03-14 | AF78842 | ND |
| 2018-05-29 | AF85267 | ND |
| 2018-07-31 | AF91266 | ND |
| 2018-08-09 | AF92390 | ND |
| 2019-08-08 | AG27413 | ND |
| 2019-08-08 | AG27411 | ND |