trans-1,2-Dichloroethylene
Westside Rural Water Supply Corporation
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 6 | 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 |
|---|---|---|
| 2015-07-14 | Q1526983005 | ND |
| 2015-07-14 | Q1526983003 | ND |
| 2015-07-14 | Q1526983001 | ND |
| 2016-11-07 | Q1647711006 | ND |
| 2016-11-07 | Q1647711012 | ND |
| 2016-11-07 | Q1647711017 | ND |
| 2016-11-07 | Q1647711009 | ND |
| 2017-01-17 | Q1701920022 | ND |
| 2017-01-17 | Q1701920010 | ND |
| 2017-01-17 | Q1701920012 | ND |
| 2017-01-17 | Q1701920009 | ND |
| 2017-04-19 | Q1716217002 | ND |
| 2017-08-08 | Q1733371001 | ND |
| 2018-10-30 | Q1843596007 | ND |
| 2018-10-30 | Q1843596006 | ND |
| 2018-10-30 | Q1843596003 | ND |
| 2018-10-30 | Q1843596002 | ND |
| 2019-05-07 | Q1920849002 | ND |
| 2019-05-07 | Q1920849008 | ND |
| 2019-05-07 | Q1920849006 | ND |
| 2019-05-07 | Q1920849004 | ND |