p-Dichlorobenzene
Choice Water Supply Corporation
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 |
|---|---|---|---|---|
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-09-02 | Q1440966001 | ND |
| 2015-07-30 | Q1529716001 | ND |
| 2015-07-30 | Q1529716003 | ND |
| 2016-09-13 | Q1637145001 | ND |
| 2016-09-13 | Q1637145003 | ND |
| 2017-11-03 | Q1756823006 | ND |
| 2017-11-03 | Q1756823001 | ND |
| 2018-09-25 | Q1838495002 | ND |
| 2018-12-11 | Q1850671006 | ND |
| 2019-03-14 | Q1910905004 | ND |
| 2019-06-17 | Q1936817002 | ND |
| 2019-06-17 | Q1936817004 | ND |