trans-1,2-Dichloroethylene
City of Ripon
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | N/A | 0 | 0 | N/A |
2015 | ND | 4 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 3 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2015-06-08 | 2625-003-1138 | ND |
2015-06-08 | 2625-007-0955 | ND |
2015-06-08 | 2625-022-1030 | ND |
2015-07-08 | 2625-024-0955 | ND |
2016-06-15 | 2625-003-0800 | ND |
2016-06-15 | 2625-010-0820 | ND |
2016-10-20 | 2625-020-1045 | ND |
2017-06-14 | 2625-010-0930 | ND |
2017-10-24 | 2625-020-1020 | ND |
2018-06-12 | 2625-003-1015 | ND |
2018-06-12 | 2625-007-0945 | ND |
2018-07-10 | 5810-024-0910 | ND |
2019-06-11 | 5810-003-0806 | ND |