o-Dichlorobenzene
City of Madison
o-Dichlorobenzene is used as a chemical intermediate for making agricultural herbicides. It is toxic to the liver, kidneys and the nervous system, and causes cancer in animal studies.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 5 | 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 600 ppb
The EWG Health Guideline of 600 ppb for o-dichlorobenzene 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) 600 ppb
The legal limit for o-dichlorobenzene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1970s.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-05-27 | 140528-004VO | ND |
2014-08-26 | 140827-001VO | ND |
2015-07-27 | 150728-018VO | ND |
2016-06-13 | 160614-019VO | ND |
2016-07-26 | 160727-005VO | ND |
2016-09-26 | 160927-028VO | ND |
2017-03-13 | 170314-006VO | ND |
2017-06-07 | 170608-003VO | ND |
2017-08-10 | 170811-001VO | ND |
2017-08-29 | 170830-006VO | ND |
2017-11-08 | 171109-005VO | ND |
2018-07-16 | 180717-011VO | ND |
2018-12-28 | 181228-002VO | ND |
2019-07-15 | 190716-010VO | ND |
2019-07-15 | 190716-011VO | ND |