p-Dichlorobenzene
Marston PWS
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2015-08-18 | AC58246 | ND |
| 2015-10-19 | AC62479 | ND |
| 2016-02-01 | AC65720 | ND |
| 2016-04-27 | AC70012 | ND |
| 2016-04-27 | AC70011 | ND |
| 2016-08-01 | AC80712 | ND |
| 2016-08-01 | AC80711 | ND |
| 2016-10-26 | AC85957 | ND |
| 2016-10-26 | AC85956 | ND |
| 2017-01-22 | AC89836 | ND |
| 2017-01-22 | AC89835 | ND |
| 2017-05-01 | AC95081 | ND |
| 2017-05-01 | AC95082 | ND |
| 2017-07-17 | AD02387 | ND |
| 2017-07-17 | AD02386 | ND |
| 2017-10-23 | AD08588 | ND |
| 2017-10-23 | AD08587 | ND |
| 2018-03-06 | AD17523 | ND |
| 2018-05-02 | AD18671 | ND |
| 2018-07-11 | AD29590 | ND |
| 2018-10-11 | AD35068 | ND |
| 2019-01-08 | AD38381 | ND |
| 2019-04-10 | AD46672 | ND |
| 2019-07-11 | AD52717 | ND |
| 2019-10-17 | AD57379 | ND |