trans-1,2-Dichloroethylene
City of Brady Water System
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 | 3 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2018-02-20 | AE14781 | ND |
| 2018-02-20 | AE14767 | ND |
| 2018-08-01 | AE35602 | ND |
| 2019-02-20 | AE55314 | ND |
| 2019-02-20 | AE55316 | ND |
| 2019-02-20 | AE55320 | ND |
| 2019-02-20 | AE55322 | ND |
| 2019-04-15 | AE62548 | ND |
| 2019-04-15 | AE62550 | ND |
| 2019-07-15 | AE74670 | ND |
| 2020-02-26 | AF00264 | ND |
| 2020-02-26 | AF00268 | ND |
| 2020-02-26 | AF00262 | ND |
| 2021-01-13 | AF39504 | ND |
| 2021-01-13 | AF39520 | ND |
| 2021-01-13 | AF39530 | ND |
| 2022-06-14 | AG00840 | ND |
| 2022-06-14 | AG00842 | ND |
| 2022-06-14 | AG00844 | ND |
| 2022-08-04 | AG07863 | ND |
| 2022-08-04 | AG07865 | ND |
| 2023-01-19 | AG25278 | ND |
| 2023-01-19 | AG25284 | ND |