p-Dichlorobenzene
Harris County MUD 167
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 | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-08-13 | AC63433 | ND |
| 2015-07-30 | AD01788 | ND |
| 2016-12-05 | AD60361 | ND |
| 2017-02-03 | AD68751 | ND |
| 2017-02-03 | AD68749 | ND |
| 2017-04-21 | AD80731 | ND |
| 2017-08-01 | AD91627 | ND |
| 2017-10-24 | AE01839 | ND |
| 2018-11-06 | AE45445 | ND |
| 2018-11-06 | AE45447 | ND |
| 2019-08-27 | AE81098 | ND |
| 2019-08-27 | AE81096 | ND |