trans-1,2-Dichloroethylene
Towering Oaks and Rosewood Hills Subdivisionivi
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 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 |
|---|---|---|
| 2015-02-23 | AC81483 | ND |
| 2015-02-23 | AC81473 | ND |
| 2015-02-23 | AC81481 | ND |
| 2016-02-17 | AD23949 | ND |
| 2016-02-17 | AD23953 | ND |
| 2016-02-17 | AD23945 | ND |
| 2017-02-07 | AD69276 | ND |
| 2017-02-07 | AD69248 | ND |
| 2017-02-07 | AD69250 | ND |
| 2018-01-22 | AE09615 | ND |
| 2018-01-22 | AE09621 | ND |
| 2018-01-22 | AE09611 | ND |
| 2018-08-03 | AE35870 | ND |
| 2018-10-30 | AE44876 | ND |
| 2019-02-20 | AE55073 | ND |
| 2019-02-20 | AE55095 | ND |
| 2019-02-20 | AE55067 | ND |
| 2019-02-20 | AE55055 | ND |
| 2019-04-25 | AE63736 | ND |