p-Dichlorobenzene
City of Humble
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2015-01-20 | AC76796 | ND |
| 2015-01-20 | AC76784 | ND |
| 2015-01-20 | AC76780 | ND |
| 2015-01-20 | AC76800 | ND |
| 2015-01-20 | AC76798 | ND |
| 2016-01-21 | AD19313 | ND |
| 2016-01-21 | AD19307 | ND |
| 2016-01-21 | AD19315 | ND |
| 2016-01-21 | AD19317 | ND |
| 2016-01-21 | AD19309 | ND |
| 2017-01-05 | AD63235 | ND |
| 2017-01-05 | AD63231 | ND |
| 2017-01-05 | AD63233 | ND |
| 2017-01-05 | AD63263 | ND |
| 2017-04-21 | AD80683 | ND |
| 2018-01-19 | AE09579 | ND |
| 2018-01-19 | AE09595 | ND |
| 2018-01-19 | AE09539 | ND |
| 2018-04-03 | AE21021 | ND |
| 2018-04-03 | AE21019 | ND |
| 2019-01-15 | AE49863 | ND |
| 2019-01-15 | AE49877 | ND |
| 2019-01-15 | AE49873 | ND |
| 2019-01-15 | AE49879 | ND |
| 2019-01-15 | AE49853 | ND |