trans-1,2-Dichloroethylene
Arizona Water Company - Pinal Valley
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 | ND | 9 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2018-02-26 | 18B2395-01 VOC | ND |
| 2019-01-22 | 19A2350-01 | ND |
| 2020-04-27 | 20D2960-01 VOC | ND |
| 2020-04-27 | 20D2966-01 VOC | ND |
| 2020-04-27 | 20D2972-01 VOC | ND |
| 2020-04-27 | 20D2974-01 VOC | ND |
| 2020-04-27 | 20D2975-01 VOC | ND |
| 2020-04-27 | 20D2977-01 | ND |
| 2020-04-27 | 20D2978-01 VOC | ND |
| 2020-04-27 | 20D2982-01 | ND |
| 2020-04-27 | 20D2984-01 VOC | ND |
| 2022-04-12 | 22D1495-01VOC | ND |
| 2022-04-19 | 22D2276-01VOC | ND |
| 2022-04-19 | 22D2277-01 | ND |
| 2023-04-25 | 23D3072-01VOC | ND |
| 2023-04-25 | 23D3076-01VOC | ND |
| 2023-04-25 | 23D3086-01VOC | ND |
| 2023-04-25 | 23D3087-01 | ND |
| 2023-04-25 | 23D3090-01 | ND |
| 2023-04-25 | 23D3091-01VOC | ND |
| 2023-04-25 | 23D3092-01VOC | ND |
| 2023-04-25 | 23D3093-01VOC | ND |