trans-1,2-Dichloroethylene
City of Brentwood
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 | 8 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-06-17 | 9590-008-1000 | ND |
| 2014-06-17 | 9590-007-1045 | ND |
| 2014-06-19 | 9590-024-0710 | ND |
| 2014-06-19 | 9590-014-0945 | ND |
| 2014-06-19 | 9590-006-1010 | ND |
| 2014-06-19 | 9590-012-0810 | ND |
| 2014-06-19 | 9590-011-0845 | ND |
| 2014-06-30 | 9590-026-0750 | ND |
| 2015-04-14 | 9590-006-1020 | ND |
| 2015-04-14 | 9590-014-1000 | ND |
| 2015-04-14 | 9590-008-0920 | ND |
| 2015-04-14 | 9590-007-1000 | ND |
| 2015-04-15 | 9590-026-1005 | ND |
| 2015-04-15 | 9590-024-0942 | ND |
| 2015-04-15 | 9590-011-0901 | ND |
| 2015-04-15 | 9590-012-0917 | ND |
| 2016-05-31 | 9590-006-0830 | ND |
| 2016-05-31 | 9590-007-0945 | ND |
| 2016-05-31 | 9590-008-0900 | ND |
| 2016-06-01 | 9590-011-0800 | ND |
| 2016-06-01 | 9590-026-0945 | ND |
| 2016-06-01 | 9590-024-0900 | ND |
| 2016-10-05 | 9590-014-1135 | ND |
| 2017-08-16 | 9590-012-1000 | ND |
| 2017-08-24 | 9590-006-0830 | ND |
| 2017-08-24 | 9590-007-0743 | ND |
| 2017-09-07 | 9590-014-0750 | ND |
| 2017-09-07 | 9590-008-0828 | ND |
| 2017-09-07 | 9590-026-0900 | ND |
| 2018-05-07 | 9590-006-0805 | ND |
| 2018-05-07 | 9590-007-0850 | ND |
| 2018-05-09 | 9590-008-0830 | ND |
| 2018-05-09 | 9590-012-0746 | ND |
| 2018-05-10 | 9590-026-0850 | ND |
| 2018-05-10 | 9590-014-0740 | ND |
| 2019-05-06 | 9590-008-0855 | ND |
| 2019-05-06 | 9590-007-0940 | ND |
| 2019-05-06 | 9590-006-1010 | ND |
| 2019-05-09 | 9590-026-1010 | ND |
| 2019-05-09 | 9590-012-0910 | ND |
| 2019-05-09 | 9590-014-0810 | ND |