trans-1,2-Dichloroethylene
Aqua Pa Springhouse Farms
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 | ND | 1 | 0 | ND |
| 2020 | 0.700 ppb | 1 | 1 | 0.700 ppb |
| 2021 | 2.50 ppb | 1 | 1 | 2.50 ppb |
| 2022 | 2.20 ppb | 1 | 1 | 2.20 ppb |
| 2023 | 1.90 ppb | 1 | 1 | 1.90 ppb |
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 |
|---|---|---|
| 2018-09-26 | AF97025 | ND |
| 2019-06-05 | AG20113 | ND |
| 2020-07-30 | 22662862.00 | 0.700 ppb |
| 2021-11-11 | 25637435.00 | 2.50 ppb |
| 2022-07-27 | 27094292.00 | 2.20 ppb |
| 2023-05-11 | 28960809.00 | 1.90 ppb |