trans-1,2-Dichloroethylene
Placer County Water Agency - Foothill
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 3 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2014-08-20 | 3334-002-1010 | ND |
2014-08-20 | 3334-007-1200 | ND |
2015-08-11 | 3334-002-1000 | ND |
2015-08-11 | 3334-007-1305 | ND |
2016-03-30 | 2113-014-1440 | ND |
2016-08-03 | 2113-014-1045 | ND |
2016-08-17 | 2113-002-1215 | ND |
2016-08-17 | 2113-007-0945 | ND |
2018-08-14 | 3334-002-1120 | ND |
2018-08-14 | 3334-007-1310 | ND |
2018-08-22 | 1233-014-0930 | ND |
2019-08-27 | 3334-002-0000 | ND |
2019-09-09 | 3334-007-1330 | ND |
2019-09-12 | 3334-014-1150 | ND |