o-Dichlorobenzene
Middlesex Water System
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 | 2 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 6 | 0 | ND |
2018 | ND | 7 | 0 | ND |
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 |
---|---|---|
2014-01-20 | 8715-012014-004V | ND |
2014-02-06 | 8715-020614-005V | ND |
2014-04-09 | 8715-040914-004V | ND |
2014-07-02 | 8715-070214-004V | ND |
2014-10-08 | 8715-100814-004V | ND |
2015-01-07 | ND | |
2015-03-12 | ND | |
2016-02-22 | 8715-022216-005V | ND |
2016-04-06 | 8715-040616-001V | ND |
2016-04-06 | 8715-040616-002V | ND |
2016-12-12 | 8715-121216-004V | ND |
2017-02-08 | 8715-020817-005V | ND |
2017-02-08 | 8715-020817-004V | ND |
2017-05-09 | 8715-050917-005V | ND |
2017-05-09 | 8715-050917-004V | ND |
2017-08-22 | 8715-082217-004V | ND |
2017-11-13 | 8715-111317-004V | ND |
2018-02-20 | 8715-022018-001V | ND |
2018-02-20 | 8715-022018-002V | ND |
2018-02-20 | 8715-022018-004V | ND |
2018-02-20 | 8715-022018-005V | ND |
2018-05-08 | 8715-050818-004V | ND |
2018-08-07 | 8715-080718-004V | ND |
2018-11-13 | 8715-111318-004V | ND |
2019-12-23 | 5971-19 | ND |