trans-1,2-Dichloroethylene
Paw Glen Alsace Div
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 | 7 | 0 | ND |
| 2020 | ND | 12 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 15 | 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 |
|---|---|---|
| 2018-02-13 | 38538801 | ND |
| 2018-02-13 | 38539501 | ND |
| 2018-02-13 | 38539201 | ND |
| 2019-02-06 | 42853101 | ND |
| 2019-02-06 | 42853301 | ND |
| 2019-02-06 | 42853201 | ND |
| 2019-07-22 | 45717501 | ND |
| 2019-07-22 | 45717601 | ND |
| 2019-07-22 | 45717401 | ND |
| 2019-07-29 | 46133302 | ND |
| 2020-02-10 | 21708723.00 | ND |
| 2020-02-10 | 21708702.00 | ND |
| 2020-02-10 | 21708681.00 | ND |
| 2020-02-10 | 21708768.00 | ND |
| 2020-02-10 | 21708789.00 | ND |
| 2020-02-11 | 21708747.00 | ND |
| 2020-02-11 | 21708618.00 | ND |
| 2020-02-11 | 21708639.00 | ND |
| 2020-02-11 | 21708660.00 | ND |
| 2020-02-17 | 21708834.00 | ND |
| 2020-02-17 | 21708813.00 | ND |
| 2020-02-17 | 21708855.00 | ND |
| 2021-02-10 | 23928440.00 | ND |
| 2021-02-10 | 23928419.00 | ND |
| 2021-02-10 | 23928461.00 | ND |
| 2022-02-10 | 26157293.00 | ND |
| 2022-02-10 | 26157313.00 | ND |
| 2022-02-10 | 26157255.00 | ND |
| 2023-02-09 | 28389648.00 | ND |
| 2023-02-09 | 28389580.00 | ND |
| 2023-02-09 | 28389624.00 | ND |
| 2023-02-09 | 28389559.00 | ND |
| 2023-02-09 | 28389601.00 | ND |
| 2023-02-09 | 28389496.00 | ND |
| 2023-02-09 | 28389475.00 | ND |
| 2023-02-09 | 28389433.00 | ND |
| 2023-02-09 | 28389538.00 | ND |
| 2023-02-09 | 28389653.00 | ND |
| 2023-02-09 | 28389517.00 | ND |
| 2023-02-09 | 28389454.00 | ND |
| 2023-04-10 | 28750988.00 | ND |
| 2023-07-11 | 29348355.00 | ND |
| 2023-10-09 | 29929562.00 | ND |