trans-1,2-Dichloroethylene
Hulon Lakes Subdivision
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 | 2 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 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 |
|---|---|---|
| 2014-01-22 | AC39835 | ND |
| 2014-01-22 | AC39829 | ND |
| 2015-02-24 | AC81703 | ND |
| 2015-02-24 | AC81707 | ND |
| 2015-03-25 | AC86040 | ND |
| 2015-03-25 | AC86042 | ND |
| 2016-01-26 | AD20080 | ND |
| 2016-01-26 | AD20112 | ND |
| 2016-01-26 | AD20070 | ND |
| 2016-01-26 | AD20068 | ND |
| 2017-09-21 | AD97405 | ND |
| 2017-09-21 | AD97403 | ND |
| 2017-09-21 | AD97401 | ND |
| 2017-09-21 | AD97397 | ND |
| 2018-07-05 | AE32442 | ND |
| 2018-07-05 | AE32444 | ND |
| 2018-07-05 | AE32440 | ND |
| 2018-07-05 | AE32448 | ND |
| 2019-10-09 | AE86145 | ND |
| 2019-10-09 | AE86141 | ND |
| 2019-10-09 | AE86143 | ND |
| 2019-10-09 | AE86139 | ND |