trans-1,2-Dichloroethylene
Ridge Spring, Town of
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 3 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 3 | 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 |
---|---|---|
2014-02-05 | AD35365 | ND |
2014-06-19 | AD41563 | ND |
2014-08-21 | AD44333 | ND |
2015-06-10 | AD56709 | ND |
2015-07-22 | AD58564 | ND |
2015-10-21 | AD63347 | ND |
2016-02-17 | AD70859 | ND |
2016-04-20 | AD74602 | ND |
2016-09-27 | AD83029 | ND |
2016-11-15 | AD85906 | ND |
2017-02-15 | AD89949 | ND |
2017-06-06 | AD95398 | ND |
2017-10-25 | AE02587 | ND |
2018-01-17 | AE06217 | ND |
2018-05-02 | AE11636 | ND |
2018-07-18 | AE15231 | ND |
2018-10-17 | AE19864 | ND |
2019-02-27 | AE26426 | ND |
2019-04-02 | AE28055 | ND |
2019-07-16 | AE33704 | ND |
2019-11-25 | AE40764 | ND |