trans-1,2-Dichloroethylene
Somers Consolidated Water District #1
NOTE: Somers Consolidated Water District #1 purchases water from Yorktown Consoldated Water District #1 which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by Yorktown Consoldated Water District #1.
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 7 | 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: Somers Consolidated Water District #1 purchases water from Yorktown Consoldated Water District #1 which is required to test for trans-1,2-dichloroethylene. Sample information shown below was taken by Yorktown Consoldated Water District #1.
| Date | Lab ID | Result |
|---|---|---|
| 2020-04-23 | AW07597-POCS | ND |
| 2020-11-24 | AW22650-POCS | ND |
| 2020-11-24 | AW22654-POCS | ND |
| 2021-04-14 | AX07015-POCS | ND |
| 2021-11-08 | AX23171-POCS | ND |
| 2021-11-18 | AX23169-POCS | ND |
| 2022-04-12 | AY06060-POC | ND |
| 2022-04-12 | AY06060-POCS | ND |
| 2022-11-01 | AY19737-POCS | ND |
| 2022-11-01 | AY19732-POCS | ND |
| 2023-04-03 | AZ05712-POCS | ND |
| 2023-11-01 | AZ20246-POCS | ND |
| 2023-11-01 | AZ20248-POCS | ND |