p-Dichlorobenzene
Yorktown Water
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 | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 1 | 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 |
|---|---|---|
| 2014-04-09 | 14100003501 | ND |
| 2014-04-09 | 14100003701 | ND |
| 2014-04-09 | 14100003602 | ND |
| 2014-04-09 | 14100003401 | ND |
| 2015-05-26 | 15148007401 | ND |
| 2015-05-26 | 15148007601 | ND |
| 2015-05-26 | 15148007502 | ND |
| 2015-05-26 | 15148007301 | ND |
| 2016-06-14 | 16168007201 | ND |
| 2016-06-14 | 16168005301 | ND |
| 2016-06-14 | 16168005401 | ND |
| 2016-06-14 | 16168007301 | ND |
| 2016-06-14 | 16168005201 | ND |
| 2016-06-14 | 16168004601 | ND |
| 2016-06-14 | 16168007102 | ND |
| 2017-05-30 | 17152005802 | ND |
| 2018-05-29 | 18151003501 | ND |
| 2018-08-20 | 18235005901 | ND |
| 2018-08-20 | 18235006001 | ND |
| 2018-08-20 | 18235006101 | ND |
| 2019-05-06 | 19129006401 | ND |
| 2019-05-06 | 19129006601 | ND |
| 2019-05-06 | 19129006501 | ND |
| 2019-05-06 | 19129005801 | ND |