trans-1,2-Dichloroethylene
Hardin County Water District #1/Ft. Knox
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 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 |
---|---|---|
2014-03-10 | 2988435 | ND |
2014-04-01 | 3000561 | ND |
2015-03-03 | 3197988 | ND |
2015-04-15 | 3225015 | ND |
2016-03-09 | 3412090 | ND |
2016-10-03 | 3557253 | ND |
2017-06-28 | 3722929 | ND |
2017-07-17 | 3734017 | ND |
2018-05-15 | 3937160 | ND |
2018-06-06 | 3954320 | ND |
2019-05-29 | 4309719 | ND |
2019-10-03 | 4444487 | ND |