trans-1,2-Dichloroethylene
Mount Auburn
NOTE: Mount Auburn purchases water from United Regional Water Coop which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by United Regional Water Coop.
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 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 4 | 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
NOTE: Mount Auburn purchases water from United Regional Water Coop which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by United Regional Water Coop.
| Date | Lab ID | Result |
|---|---|---|
| 2022-11-21 | 22K0593-01 | ND |
| 2023-01-23 | 23A0379-01 | ND |
| 2023-04-04 | 23D0034-01 | ND |
| 2023-08-23 | GH04944-01 | ND |
| 2023-12-07 | GL01592-01 | ND |