trans-1,2-Dichloroethylene
Boys Ranch Town
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 | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 8 | 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 |
|---|---|---|
| 2014-02-10 | 039494.001 | ND |
| 2015-02-05 | 052973.001 | ND |
| 2016-03-30 | SDWA-1024553-00 | ND |
| 2016-09-27 | SDWA-1074797-00 | ND |
| 2017-03-20 | SDWA-1136591-00 | ND |
| 2017-03-20 | SDWA-1136590-00 | ND |
| 2017-05-09 | SDWA-1150974-00 | ND |
| 2017-05-09 | SDWA-1150969-00 | ND |
| 2017-09-12 | SDWA-1192046-00 | ND |
| 2017-09-12 | SDWA-1192042-00 | ND |
| 2017-09-12 | SDWA-1192037-00 | ND |
| 2017-11-28 | SDWA-1214426-00 | ND |
| 2017-11-28 | SDWA-1214421-00 | ND |
| 2018-02-12 | SDWA-1237821-00 | ND |
| 2018-04-11 | SDWA-1253546-00 | ND |
| 2018-06-04 | SDWA-1268265-00 | ND |
| 2018-08-23 | SDWA-1291394-00 | ND |
| 2018-08-23 | SDWA-1291389-00 | ND |
| 2018-10-15 | SDWA-1313813-00 | ND |
| 2018-10-15 | SDWA-1313808-00 | ND |
| 2019-02-12 | SDWA-1339118-00 | ND |
| 2019-02-12 | SDWA-1339113-00 | ND |
| 2019-03-19 | SDWA-1361395-00 | ND |
| 2019-03-19 | SDWA-1361390-00 | ND |
| 2019-07-30 | SDWA-1392392-00 | ND |
| 2019-07-30 | SDWA-1392387-00 | ND |
| 2019-10-23 | SDWA-1424992-00 | ND |
| 2019-10-23 | SDWA-1424997-00 | ND |