trans-1,2-Dichloroethylene
Bremen Water Department
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 |
|---|---|---|---|---|
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-01-16 | 18000814003RV-1801 | ND |
| 2018-05-01 | 18006796001RV-1802 | ND |
| 2018-07-24 | 18011673001RV-1803 | ND |
| 2018-07-24 | 18011674001RV-1803 | ND |
| 2018-11-06 | 18017827001RV-1804 | ND |
| 2019-08-20 | 19012696001RV-1903 | ND |
| 2020-08-11 | 20012117-002 | ND |
| 2020-08-11 | 20012117-004 | ND |
| 2021-07-13 | 21013532-002-0019 | ND |
| 2022-07-25 | 22013843-001-0006 | ND |
| 2023-01-04 | 23000270-001-0005 | ND |
| 2023-08-23 | 23015635-001-0006 | ND |