trans-1,2-Dichloroethylene
Forrest City Waterworks
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 |
|---|---|---|---|---|
| 2012 | ND | 9 | 0 | ND |
| 2013 | ND | 9 | 0 | ND |
| 2014 | ND | 9 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 9 | 0 | ND |
| 2017 | ND | 11 | 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 |
|---|---|---|
| 2012-01-25 | 12026006101 | ND |
| 2012-01-25 | 12026006001 | ND |
| 2012-06-13 | 12166003101 | ND |
| 2012-06-13 | 12166003001 | ND |
| 2012-06-13 | 12166002901 | ND |
| 2012-08-27 | 12242003801 | ND |
| 2012-08-27 | 12242003701 | ND |
| 2012-10-02 | 12278014001 | ND |
| 2012-10-02 | 12278013901 | ND |
| 2013-02-12 | 13044000901 | ND |
| 2013-02-12 | 13044000801 | ND |
| 2013-04-01 | 13094007201 | ND |
| 2013-04-01 | 13094007101 | ND |
| 2013-04-01 | 13094007301 | ND |
| 2013-08-27 | 13241000309 | ND |
| 2013-08-27 | 13241000209 | ND |
| 2013-11-05 | 13310000809 | ND |
| 2013-11-05 | 13310000909 | ND |
| 2014-02-05 | 14038000701 | ND |
| 2014-02-05 | 14038000602 | ND |
| 2014-04-23 | 14114014301 | ND |
| 2014-04-23 | 14114013809 | ND |
| 2014-04-23 | 14114014002 | ND |
| 2014-08-27 | 14240000702 | ND |
| 2014-08-27 | 14240001201 | ND |
| 2014-11-24 | 14330003701 | ND |
| 2014-11-24 | 14330003801 | ND |
| 2015-01-12 | 15015008601 | ND |
| 2015-01-12 | 15015008501 | ND |
| 2015-04-08 | 15099007301 | ND |
| 2015-04-08 | 15099007201 | ND |
| 2015-08-24 | 15238000602 | ND |
| 2015-08-24 | 15238000701 | ND |
| 2015-12-01 | 15337004901 | ND |
| 2015-12-01 | 15337004801 | ND |
| 2016-02-16 | 16049005401 | ND |
| 2016-02-16 | 16049005301 | ND |
| 2016-04-20 | 16112007601 | ND |
| 2016-04-20 | 16112007501 | ND |
| 2016-07-06 | 16189013609 | ND |
| 2016-07-06 | 16189013509 | ND |
| 2016-08-24 | 16237004701 | ND |
| 2016-10-03 | 16279003208 | ND |
| 2016-10-03 | 16279003108 | ND |
| 2017-01-16 | 17019008401 | ND |
| 2017-01-16 | 17019008501 | ND |
| 2017-04-03 | 17096000101 | ND |
| 2017-04-03 | 17096000209 | ND |
| 2017-04-03 | 17096004801 | ND |
| 2017-07-03 | 17187007001 | ND |
| 2017-07-03 | 17187007101 | ND |
| 2017-07-03 | 17187007202 | ND |
| 2017-10-03 | 17278005801 | ND |
| 2017-10-03 | 17278005701 | ND |
| 2017-10-03 | 17278005602 | ND |