trans-1,2-Dichloroethylene
City of Broussard Highway 90 Water System
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 | 24 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 12 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-02-17 | AD89082 | ND |
| 2014-02-17 | AD89082 | ND |
| 2014-03-24 | AD89953 | ND |
| 2014-03-24 | AD89952 | ND |
| 2014-03-24 | AD89953 | ND |
| 2014-03-24 | AD89952 | ND |
| 2014-05-05 | AD91181 | ND |
| 2014-05-05 | AD91179 | ND |
| 2014-05-05 | AD91180 | ND |
| 2014-05-05 | AD91181 | ND |
| 2014-05-05 | AD91180 | ND |
| 2014-05-05 | AD91179 | ND |
| 2014-09-15 | AD96936 | ND |
| 2014-09-15 | AD96937 | ND |
| 2014-09-15 | AD96938 | ND |
| 2014-09-15 | AD96936 | ND |
| 2014-09-15 | AD96937 | ND |
| 2014-09-15 | AD96938 | ND |
| 2014-11-17 | AD99809 | ND |
| 2014-11-17 | AD99810 | ND |
| 2014-11-17 | AD99811 | ND |
| 2014-11-17 | AD99809 | ND |
| 2014-11-17 | AD99810 | ND |
| 2014-11-17 | AD99811 | ND |
| 2015-11-30 | 35218949002 | ND |
| 2015-11-30 | 35218949001 | ND |
| 2015-11-30 | 35218949002 | ND |
| 2015-11-30 | 35218949001 | ND |
| 2016-06-07 | 35248530008 | ND |
| 2016-06-07 | 35248530006 | ND |
| 2016-06-07 | 35248530007 | ND |
| 2016-06-07 | 35248530006 | ND |
| 2016-06-07 | 35248530007 | ND |
| 2016-06-07 | 35248530008 | ND |
| 2016-11-01 | 35274958005 | ND |
| 2016-11-01 | 35274958005 | ND |
| 2016-11-01 | 35274958004 | ND |
| 2016-11-01 | 35274958003 | ND |
| 2016-11-01 | 35274958003 | ND |
| 2016-11-01 | 35274958004 | ND |
| 2017-03-03 | 35299127005 | ND |
| 2017-03-03 | 35299127004 | ND |
| 2017-03-03 | 35299127003 | ND |
| 2017-03-03 | 35299127003 | ND |
| 2017-03-03 | 35299127004 | ND |
| 2017-03-03 | 35299127005 | ND |
| 2018-06-12 | 35398353001 | ND |
| 2018-06-12 | 35398353002 | ND |
| 2018-06-12 | 35398353001 | ND |
| 2018-06-12 | 35398353002 | ND |