o-Dichlorobenzene
Carlsbad Municipal 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 | 3 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 5 | 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 |
---|---|---|
2014-01-15 | 1401736-001A | ND |
2014-06-24 | 1406C71-001A | ND |
2014-06-24 | 1406C70-001A | ND |
2016-02-09 | 1602465-001A | ND |
2016-04-12 | 1604620-001A | ND |
2017-06-05 | 2017016707 | ND |
2017-06-05 | 2017016705 | ND |
2017-06-05 | 2017016706 | ND |
2018-04-23 | 2018011506 | ND |
2018-06-04 | 1806144-001 | ND |
2018-07-09 | 2018018947 | ND |
2018-09-10 | 1809604-001 | ND |
2018-10-01 | 2018028326 | ND |
2019-02-11 | 2019003803 | ND |
2019-02-11 | 2019003804 | ND |