trans-1,2-Dichloroethylene
Aqua Pa Uwchlan
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 | 6 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 7 | 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 |
|---|---|---|
| 2018-01-29 | AF74449 | ND |
| 2018-01-31 | AF73819 | ND |
| 2018-02-26 | AF76934 | ND |
| 2018-02-26 | AF76935 | ND |
| 2018-03-13 | AF77984 | ND |
| 2018-03-13 | AF77985 | ND |
| 2019-03-06 | AG10268 | ND |
| 2019-03-06 | AG10267 | ND |
| 2019-03-06 | AG10266 | ND |
| 2019-03-12 | AG10439 | ND |
| 2019-03-12 | AG10441 | ND |
| 2019-03-27 | AG11746 | ND |
| 2019-11-07 | AG37520 | ND |
| 2020-03-11 | 21837118.00 | ND |
| 2020-03-11 | 21837202.00 | ND |
| 2020-03-11 | 21837160.00 | ND |
| 2020-03-11 | 21837139.00 | ND |
| 2020-03-26 | 21837181.00 | ND |
| 2020-05-21 | 22205099.00 | ND |
| 2021-02-10 | 23880023.00 | ND |
| 2021-02-10 | 23880065.00 | ND |
| 2021-02-10 | 23880044.00 | ND |
| 2021-02-23 | 23880107.00 | ND |
| 2021-02-23 | 23880086.00 | ND |
| 2021-07-09 | 24819015.00 | ND |
| 2022-02-18 | 26109271.00 | ND |
| 2022-02-18 | 26109359.00 | ND |
| 2022-02-18 | 26109292.00 | ND |
| 2022-02-18 | 26109313.00 | ND |
| 2022-02-18 | 26109338.00 | ND |
| 2022-08-03 | 27224143.00 | ND |
| 2022-11-29 | 27814198.00 | ND |
| 2023-02-17 | 28341082.00 | ND |
| 2023-02-27 | 28341103.00 | ND |
| 2023-02-27 | 28341124.00 | ND |
| 2023-03-21 | 28512453.00 | ND |
| 2023-03-21 | 28512432.00 | ND |
| 2023-04-17 | 28692199.00 | ND |
| 2023-05-01 | 28890019.00 | ND |
| 2023-08-29 | 29691269.00 | ND |