trans-1,2-Dichloroethylene
Elk Grove Water Service
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 | ND | 8 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 10 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-07-01 | 5810-017-0945 | ND |
| 2014-07-08 | 5810-016-0905 | ND |
| 2014-07-15 | 5810-015-0900 | ND |
| 2014-07-17 | 5810-020-1210 | ND |
| 2014-07-22 | 5810-009-1000 | ND |
| 2014-07-29 | 5810-003-0940 | ND |
| 2014-08-12 | 5810-008-0840 | ND |
| 2014-11-10 | 5810-019-1110 | ND |
| 2015-05-19 | 5810-013-1400 | ND |
| 2015-05-19 | 5810-013-1426 | ND |
| 2015-05-21 | 5810-013-0935 | ND |
| 2017-01-05 | 5810-016-1130 | ND |
| 2017-01-05 | 5810-020-1230 | ND |
| 2017-01-31 | 5810-017-0940 | ND |
| 2017-01-31 | 5810-019-1015 | ND |
| 2017-01-31 | 5810-015-1100 | ND |
| 2017-02-21 | 5810-009-0930 | ND |
| 2017-02-27 | 5810-003-1045 | ND |
| 2017-03-07 | 5810-008-1215 | ND |
| 2017-09-07 | 5810-014-1230 | ND |
| 2017-09-07 | 5810-013-1130 | ND |