o-Dichlorobenzene
City of Caldwell
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 | ND | 3 | 0 | ND |
2016 | ND | 13 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 7 | 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 |
---|---|---|
2014-06-18 | V1422594 | ND |
2014-09-29 | V1438512 | ND |
2014-11-13 | V1445335 | ND |
2015-03-10 | V1509143 | ND |
2015-05-06 | V1517379 | ND |
2015-09-24 | V1541055 | ND |
2016-10-12 | V1647131 | ND |
2016-10-12 | V1647132 | ND |
2016-10-12 | V1647133 | ND |
2016-10-12 | V1647134 | ND |
2016-10-12 | V1647135 | ND |
2016-10-13 | V1647137 | ND |
2016-10-13 | V1647136 | ND |
2016-10-13 | V1647138 | ND |
2016-10-13 | V1647139 | ND |
2016-10-13 | V1647140 | ND |
2016-10-13 | V1647141 | ND |
2016-10-13 | V1647142 | ND |
2016-10-19 | V1647952 | ND |
2019-08-06 | V1938597 | ND |
2019-08-06 | V1938594 | ND |
2019-08-19 | V1941179 | ND |
2019-08-19 | V1941177 | ND |
2019-08-19 | V1941174 | ND |
2019-08-19 | V1941183 | ND |
2019-08-19 | V1941181 | ND |