p-Dichlorobenzene
Northwest Harris County Municipal Utility District 23
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 | 4 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 4 | 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 |
---|---|---|
2014-04-30 | AC52362 | ND |
2015-02-12 | AC80441 | ND |
2015-05-05 | AC90544 | ND |
2015-09-03 | AD05660 | ND |
2015-11-12 | AD13388 | ND |
2016-02-04 | AD22165 | ND |
2016-04-28 | AD34644 | ND |
2016-09-22 | AD50823 | ND |
2016-11-08 | AD57113 | ND |
2017-01-12 | AD64732 | ND |
2017-04-12 | AD79463 | ND |
2017-07-13 | AD89325 | ND |
2017-10-17 | AE01089 | ND |
2018-01-11 | AE08956 | ND |
2018-05-17 | AE26815 | ND |
2018-07-12 | AE33153 | ND |
2018-10-09 | AE42952 | ND |
2019-01-31 | AE52467 | ND |
2019-09-25 | AE84642 | ND |
2019-11-07 | AE88933 | ND |