trans-1,2-Dichloroethylene
White Fence Farms Mutual Water Company
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 | 4 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-03-04 | 3761-009-1148 | ND |
| 2014-03-11 | 3761-004-1137 | ND |
| 2014-06-03 | 3761-009-1138 | ND |
| 2014-06-10 | 3761-004-1138 | ND |
| 2015-06-09 | 3761-009-1152 | ND |
| 2015-10-13 | 3761-004-1147 | ND |
| 2016-06-21 | 3761-009-1128 | ND |
| 2016-06-28 | 3761-004-1205 | ND |
| 2017-03-28 | 3761-004-1150 | ND |
| 2017-06-13 | 3761-009-1224 | ND |
| 2018-06-05 | 3761-009-1133 | ND |
| 2019-06-04 | 3761-009-1043 | ND |
| 2019-09-10 | 3761-004-1130 | ND |