trans-1,2-Dichloroethylene
Alco Water Service
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 | 6 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-02-26 | 2706-007-1040 | ND |
| 2014-11-18 | 2706-022-0830 | ND |
| 2014-12-09 | 2706-804-1000 | ND |
| 2014-12-09 | 2706-803-1100 | ND |
| 2014-12-09 | 2706-802-0925 | ND |
| 2014-12-09 | 2706-801-1050 | ND |
| 2015-03-04 | 2706-004-1005 | ND |
| 2015-03-10 | 2706-021-1215 | ND |
| 2015-12-17 | 2706-011-1120 | ND |
| 2016-03-30 | 2706-011-0905 | ND |
| 2016-07-13 | 2706-011-1420 | ND |
| 2016-07-13 | 2706-001-1435 | ND |
| 2016-09-28 | 2706-011-1215 | ND |
| 2017-03-14 | 2706-007-1130 | ND |
| 2017-09-27 | 5810-011-1111 | ND |
| 2017-11-14 | 5810-022-0930 | ND |
| 2018-03-06 | 5810-021-0946 | ND |
| 2018-03-06 | 5810-004-0906 | ND |
| 2018-06-20 | 5810-011-1006 | ND |
| 2019-09-10 | 5810-001-0911 | ND |