o-Dichlorobenzene
Middleborough Water Supply
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 | 11 | 0 | ND |
2015 | ND | 10 | 0 | ND |
2016 | ND | 9 | 0 | ND |
2017 | ND | 11 | 0 | ND |
2018 | ND | 10 | 0 | ND |
2019 | ND | 9 | 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 | Result |
---|---|
2014-02-12 | ND |
2014-02-12 | ND |
2014-02-12 | ND |
2014-02-12 | ND |
2014-02-12 | ND |
2014-02-12 | ND |
2014-02-12 | ND |
2014-02-12 | ND |
2014-05-09 | ND |
2014-05-30 | ND |
2014-06-23 | ND |
2015-01-20 | ND |
2015-03-11 | ND |
2015-03-11 | ND |
2015-03-11 | ND |
2015-03-11 | ND |
2015-03-11 | ND |
2015-03-11 | ND |
2015-03-23 | ND |
2015-04-27 | ND |
2015-04-27 | ND |
2016-03-08 | ND |
2016-03-08 | ND |
2016-03-09 | ND |
2016-03-10 | ND |
2016-03-10 | ND |
2016-03-10 | ND |
2016-03-11 | ND |
2016-03-21 | ND |
2016-07-28 | ND |
2017-02-14 | ND |
2017-02-14 | ND |
2017-02-14 | ND |
2017-02-14 | ND |
2017-02-14 | ND |
2017-02-14 | ND |
2017-02-15 | ND |
2017-02-27 | ND |
2017-05-09 | ND |
2017-05-09 | ND |
2017-05-09 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-02-08 | ND |
2018-05-10 | ND |
2018-05-10 | ND |
2019-02-13 | ND |
2019-02-13 | ND |
2019-02-13 | ND |
2019-02-13 | ND |
2019-02-13 | ND |
2019-02-13 | ND |
2019-04-16 | ND |
2019-04-16 | ND |
2019-10-22 | ND |