trans-1,2-Dichloroethylene
Sleepy Valley Water Company
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 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 |
|---|---|---|
| 2018-07-03 | CA1900903_001_001-201807030824 | ND |
| 2018-07-03 | CA1900903_002_002-201807030843 | ND |
| 2019-12-18 | CA1900903_001_001-201912180745 | ND |
| 2019-12-18 | CA1900903_002_002-201912180745 | ND |
| 2020-07-08 | CA1900903_001_001-202007080730 | ND |
| 2020-07-08 | CA1900903_002_002-202007080740 | ND |
| 2021-08-04 | CA1900903_002_002-202108040730 | ND |
| 2021-08-04 | CA1900903_001_001-202108040720 | ND |
| 2022-06-29 | CA1900903_002_002-202206291028 | ND |
| 2022-06-29 | CA1900903_001_001-202206291020 | ND |
| 2023-11-15 | CA1900903_001_001-202311150730 | ND |
| 2023-11-15 | CA1900903_002_002-202311150730 | ND |