p-Dichlorobenzene
City of Patterson
p-Dichlorobenzene is a carcinogenic insecticide used in mothballs, and added to deodorant blocks made for trash cans and toilets. Long-term exposure can cause liver damage and kidney problems.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 5 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 6 ppb
The EWG Health Guideline of 6 ppb for p-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 cancer.
EPA Maximum Contaminant
Level (MCL) 75 ppb
The legal limit for p-dichlorobenzene, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1980s. This limit may not fully protect against the risk of cancer due to p-dichlorobenzene exposure.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-11 | 5867-018-0928 | ND |
| 2014-05-13 | 5867-012-0900 | ND |
| 2014-06-10 | 5867-018-0930 | ND |
| 2014-09-09 | 5867-018-1005 | ND |
| 2014-12-09 | 5867-018-1146 | ND |
| 2015-03-12 | 5867-018-1224 | ND |
| 2015-10-13 | 5867-014-0847 | ND |
| 2016-02-02 | 5867-016-0835 | ND |
| 2016-08-16 | 5867-002-1011 | ND |
| 2016-08-16 | 5867-009-0952 | ND |
| 2016-08-16 | 5867-005-0909 | ND |
| 2017-05-02 | 5867-012-0957 | ND |
| 2017-06-06 | 5867-018-0950 | ND |
| 2018-10-02 | 5867-014-1130 | ND |
| 2019-02-05 | 5867-016-0945 | ND |
| 2019-08-06 | 5867-009-0800 | ND |
| 2019-08-06 | 5867-005-0830 | ND |
| 2019-08-06 | 5867-002-0725 | ND |