trans-1,2-Dichloroethylene
Prineville, City of
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 | 1 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2018-11-06 | 1884729-V | ND |
| 2019-05-20 | 1935386-V | ND |
| 2019-05-20 | 1935392-V | ND |
| 2019-05-20 | 1935387-V | ND |
| 2020-03-19 | X040779-V | ND |
| 2021-02-08 | X044752-V | ND |
| 2022-04-26 | 22-27123-V | ND |
| 2022-04-26 | 22-27115-V | ND |
| 2022-05-12 | X050385-V | ND |
| 2022-05-24 | 22-33327-V | ND |
| 2022-05-24 | 22-33318-V | ND |
| 2022-05-24 | 22-33319-V | ND |