o-Dichlorobenzene
Town of Middletown
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 | 5 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 1 | 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 |
---|---|---|
2014-03-20 | 0100018_01_00414 | ND |
2014-03-20 | 0100018_03_00414 | ND |
2014-04-28 | 0100018_01_35531 | ND |
2014-05-12 | 0100018_01_35540 | ND |
2014-09-16 | 0100018_01_35599 | ND |
2015-08-25 | E16000759007 | ND |
2016-08-08 | E17000529004 | ND |
2016-08-08 | E17000529006 | ND |
2017-06-08 | E17004862006 | ND |
2017-06-08 | E17004867001 | ND |
2019-07-17 | E20000223004 | ND |