p-Dichlorobenzene
Harris County Water Control and Improvement District 70
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.
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 | 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 |
---|---|---|
2014-10-21 | AC70138 | ND |
2015-04-29 | AC89850 | ND |
2015-04-29 | AC89862 | ND |
2016-03-30 | AD31206 | ND |
2016-03-30 | AD31180 | ND |
2017-05-05 | AD83124 | ND |
2017-05-05 | AD83126 | ND |
2018-03-09 | AE17920 | ND |
2018-03-09 | AE17890 | ND |
2019-05-09 | AE65729 | ND |
2019-05-09 | AE65723 | ND |