o-Dichlorobenzene
Cedar Springs Mobile Home Park Well #
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 | 0.148 ppb | 4 | 3 | ND - 0.210 ppb |
2015 | 0.213 ppb | 4 | 4 | 0.180 ppb - 0.250 ppb |
2016 | 0.125 ppb | 4 | 3 | ND - 0.200 ppb |
2017 | 0.1000 ppb | 1 | 1 | 0.1000 ppb |
2018 | ND | 1 | 0 | ND |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-02-17 | L4899963-1 | 0.180 ppb |
2014-05-12 | L5015794-1 | 0.200 ppb |
2014-08-11 | L5157932-1 | ND |
2014-11-10 | L5284499-1 | 0.210 ppb |
2015-02-09 | L5406152-1 | 0.250 ppb |
2015-05-11 | L5537685-1 | 0.220 ppb |
2015-08-21 | L5706912-1 | 0.200 ppb |
2015-11-09 | L5861152-1 | 0.180 ppb |
2016-02-08 | L6015148-1 | ND |
2016-05-09 | L6176791-1 | 0.200 ppb |
2016-08-15 | L6366570-1 | 0.1000 ppb |
2016-11-14 | L6514085-1 | 0.200 ppb |
2017-02-13 | L6639633-1 | 0.1000 ppb |
2018-01-29 | 3863771 | ND |