trans-1,2-Dichloroethylene
Pennsylvania American Royersford
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 | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-04-11 | 39073401 | ND |
| 2018-04-11 | 39072901 | ND |
| 2018-04-11 | 39074201 | ND |
| 2018-04-11 | 39073001 | ND |
| 2019-04-08 | 43660501 | ND |
| 2019-04-08 | 43660601 | ND |
| 2019-04-08 | 43659301 | ND |
| 2019-04-23 | 43659401 | ND |
| 2020-04-02 | 22016197.00 | ND |
| 2020-04-02 | 22016081.00 | ND |
| 2020-04-02 | 22016153.00 | ND |
| 2020-04-02 | 22016176.00 | ND |
| 2020-04-02 | 22016132.00 | ND |
| 2021-04-01 | 24241270.00 | ND |
| 2021-04-01 | 24241291.00 | ND |
| 2021-04-01 | 24241314.00 | ND |
| 2021-08-05 | 25016535.00 | ND |
| 2021-10-14 | 25398548.00 | ND |
| 2021-11-11 | 25582460.00 | ND |
| 2022-02-09 | 26111854.00 | ND |
| 2022-04-14 | 26458188.00 | ND |
| 2022-04-14 | 26458182.00 | ND |
| 2022-04-14 | 26458212.00 | ND |
| 2022-05-12 | 26641733.00 | ND |
| 2023-04-19 | 28695818.00 | ND |
| 2023-04-19 | 28695886.00 | ND |
| 2023-04-19 | 28695797.00 | ND |
| 2023-04-19 | 28695839.00 | ND |
| 2023-04-19 | 28695860.00 | ND |