trans-1,2-Dichloroethylene
East Alton
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 | 0.593 ppb | 4 | 4 | 0.540 ppb - 0.640 ppb |
| 2019 | 0.278 ppb | 4 | 2 | ND - 0.600 ppb |
| 2020 | 0.808 ppb | 4 | 4 | 0.700 ppb - 0.900 ppb |
| 2021 | 0.653 ppb | 4 | 3 | ND - 1.000 ppb |
| 2022 | 0.490 ppb | 4 | 2 | ND - 1.10 ppb |
| 2023 | 0.755 ppb | 4 | 3 | ND - 1.40 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 |
|---|---|---|
| 2018-01-16 | 8013018-01 | 0.610 ppb |
| 2018-04-03 | 8041291-01 | 0.580 ppb |
| 2018-08-28 | 8085787-01 | 0.640 ppb |
| 2018-10-22 | 8105047-01 | 0.540 ppb |
| 2019-01-22 | 9014063-01 | 0.510 ppb |
| 2019-04-29 | 9050017-01 | 0.600 ppb |
| 2019-07-24 | 9075426-01 | ND |
| 2019-10-22 | 9105187-01 | ND |
| 2020-01-07 | 0011946-01 | 0.870 ppb |
| 2020-04-29 | 0050025-01 | 0.760 ppb |
| 2020-08-24 | 0085846-01 | 0.700 ppb |
| 2020-10-06 | 0101784-01 | 0.900 ppb |
| 2021-01-25 | EA04364-01 | 0.770 ppb |
| 2021-04-20 | ED04366-01 | 0.840 ppb |
| 2021-07-20 | EG04577-01 | ND |
| 2021-10-26 | EJ05305-01 | 1.000 ppb |
| 2022-01-11 | FA02423-01 | 0.860 ppb |
| 2022-04-19 | FD03918-01 | ND |
| 2022-08-01 | FH00772-01 | 1.10 ppb |
| 2022-10-25 | FJ04962-01 | ND |
| 2023-01-23 | GA04262-01 | 0.840 ppb |
| 2023-04-25 | GD04539-01 | 0.780 ppb |
| 2023-07-31 | GH00321-01 | ND |
| 2023-10-17 | GJ03547-01 | 1.40 ppb |