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 |
|---|---|---|---|---|
| 2014 | ND | 4 | 0 | ND |
| 2015 | 0.392 ppb | 5 | 3 | ND - 0.730 ppb |
| 2016 | 0.268 ppb | 4 | 2 | ND - 0.560 ppb |
| 2017 | 0.640 ppb | 4 | 4 | 0.560 ppb - 0.700 ppb |
| 2018 | 0.474 ppb | 5 | 4 | ND - 0.640 ppb |
| 2019 | 0.278 ppb | 4 | 2 | ND - 0.600 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-01-27 | 4013392-01 | ND |
| 2014-04-29 | 4050058-01 | ND |
| 2014-07-08 | 4071420-01 | ND |
| 2014-10-01 | 4100515-01 | ND |
| 2015-01-06 | 5010598-01 | 0.730 ppb |
| 2015-04-28 | 5044341-01 | 0.590 ppb |
| 2015-07-13 | 5072386-01 | ND |
| 2015-08-17 | 5083224-01 | ND |
| 2015-10-26 | 5103981-01 | 0.640 ppb |
| 2016-01-13 | 6012101-01 | ND |
| 2016-04-05 | 6040948-01 | 0.510 ppb |
| 2016-07-12 | 6072308-01 | 0.560 ppb |
| 2016-10-04 | 6100602-01 | ND |
| 2017-01-09 | 7011602-01 | 0.690 ppb |
| 2017-04-11 | 7041696-01 | 0.700 ppb |
| 2017-07-11 | 7072612-01 | 0.560 ppb |
| 2017-10-04 | 7100919-01 | 0.610 ppb |
| 2018-01-16 | 8013018-01 | 0.610 ppb |
| 2018-04-03 | 8041291-01 | 0.580 ppb |
| 2018-08-21 | 18H1017-01_02 | ND |
| 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 |