trans-1,2-Dichloroethylene
City of Aberdeen
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 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 8 | 0 | ND |
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 |
|---|---|---|
| 2014-02-24 | 0120001_01_12840 | ND |
| 2014-05-12 | 0120001_01_13840 | ND |
| 2014-08-13 | 0120001_01_16860 | ND |
| 2014-11-05 | 0120001_01_18343 | ND |
| 2015-02-12 | 0120001_01_19762 | ND |
| 2015-05-06 | 20997 | ND |
| 2015-08-05 | 22537 | ND |
| 2015-11-17 | 24004 | ND |
| 2016-02-10 | 25092 | ND |
| 2016-05-11 | 26306 | ND |
| 2016-08-23 | 27583 | ND |
| 2017-05-09 | 31451 | ND |
| 2017-08-08 | 32898 | ND |
| 2017-11-20 | 34466 | ND |
| 2018-02-15 | 35640 | ND |
| 2018-03-27 | E18003487004 | ND |
| 2018-06-14 | E18004510001 | ND |
| 2018-08-09 | 38224 | ND |
| 2018-09-13 | E19000940004 | ND |
| 2018-11-01 | E19001521001 | ND |
| 2018-11-27 | 39793 | ND |
| 2019-02-19 | 41965 | ND |
| 2019-03-25 | E19003076001 | ND |
| 2019-05-07 | 43059 | ND |
| 2019-06-27 | E19004488002 | ND |
| 2019-08-13 | 44502 | ND |
| 2019-09-19 | E20001143001 | ND |
| 2019-11-12 | E20001849001 | ND |
| 2019-11-14 | 45847 | ND |