trans-1,2-Dichloroethylene
Bedford Consolidated Water District
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 | 3 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-04-20 | AU08070POCS | ND |
| 2018-04-20 | AU08069POCS | ND |
| 2018-08-13 | AU17333POCS | ND |
| 2019-11-14 | AV24028POCS | ND |
| 2019-11-19 | CE63513POCS | ND |
| 2020-02-25 | AW03863POCS | ND |
| 2020-08-19 | AW16062-POCS | ND |
| 2020-08-19 | AW16064-POCS | ND |
| 2020-08-19 | AW16070-POCS | ND |
| 2020-11-04 | CH09389POCS | ND |
| 2020-11-04 | CH09390POCS | ND |
| 2021-02-03 | AX02233-POCS | ND |
| 2021-09-21 | AX19304-POCS | ND |
| 2021-09-21 | CJ33013-POCS | ND |
| 2021-09-21 | AX19306-POCS | ND |
| 2021-09-21 | AX19302-POCS | ND |
| 2021-11-10 | CJ75404-POCS | ND |
| 2021-11-10 | CJ75405-POCS | ND |
| 2022-02-15 | AY02782-POCS | ND |
| 2022-09-21 | AY17019-POCS | ND |
| 2022-09-21 | AY17021-POCS | ND |
| 2022-09-28 | AY17459-POCS | ND |
| 2022-11-30 | CM96271-POCS | ND |
| 2022-11-30 | CM96270-POCS | ND |
| 2023-08-29 | AZ15964-POCS | ND |
| 2023-08-29 | AZ15968-POCS | ND |
| 2023-08-29 | AZ15966-POCS | ND |
| 2023-11-28 | CP54782-POCS | ND |
| 2023-11-28 | CP54783-POCS | ND |