p-Dichlorobenzene
City of Hereford
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 | ND | 3 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | 0.163 ppb | 4 | 1 | ND - 0.650 ppb |
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 |
|---|---|---|
| 2014-02-12 | Q1404321004 | ND |
| 2014-02-12 | Q1404321014 | ND |
| 2014-02-12 | Q1404321012 | ND |
| 2015-01-29 | Q1503619008 | ND |
| 2015-01-29 | Q1503619001 | ND |
| 2015-01-29 | Q1503619003 | ND |
| 2015-01-29 | Q1503619006 | ND |
| 2016-02-10 | Q1605969003 | ND |
| 2016-02-10 | Q1605969002 | ND |
| 2016-03-17 | Q1611196004 | ND |
| 2016-03-17 | Q1611196002 | ND |
| 2016-09-15 | Q1637842006 | ND |
| 2016-10-18 | Q1644175005 | ND |
| 2017-01-17 | Q1702053006 | ND |
| 2017-04-10 | Q1714723001 | ND |
| 2017-05-09 | Q1718998002 | ND |
| 2017-07-13 | Q1728901008 | ND |
| 2018-01-16 | Q1801777003 | ND |
| 2018-04-12 | Q1815215002 | ND |
| 2018-08-01 | Q1830563001 | ND |
| 2018-10-11 | Q1840697008 | ND |
| 2019-01-17 | Q1902747006 | 0.650 ppb |
| 2019-04-23 | Q1916150006 | ND |
| 2019-05-30 | Q1930309001 | ND |
| 2019-07-08 | Q1942256001 | ND |