p-Dichlorobenzene
Blackjack Water Supply Corporation
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 |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-03-22 | Q1811649001 | ND |
| 2018-03-22 | Q1811649011 | ND |
| 2019-05-21 | Q1927030006 | ND |
| 2019-05-21 | Q1927030008 | ND |
| 2020-03-09 | Q2008429001 | ND |
| 2020-03-09 | Q2008429003 | ND |
| 2020-05-07 | Q2018092003 | ND |
| 2020-07-30 | Q2029903003 | ND |
| 2021-09-29 | Q2126705005 | ND |
| 2021-09-29 | Q2126705007 | ND |
| 2022-06-13 | Q2216378006 | ND |
| 2022-06-13 | Q2216378008 | ND |
| 2023-04-03 | Q2312018003 | ND |
| 2023-04-03 | Q2312018005 | ND |