p-Dichlorobenzene
St Charles Water District 1 East Bank
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 | 8 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 4 | 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 |
|---|---|---|
| 2018-01-23 | 35370117001 | ND |
| 2018-01-23 | 35370117001 | ND |
| 2019-01-22 | 35444037001 | ND |
| 2019-01-22 | 35444038001 | ND |
| 2019-01-22 | 35444037001 | ND |
| 2019-01-22 | 35444038001 | ND |
| 2019-09-05 | 35495382002 | ND |
| 2019-09-05 | 35495382001 | ND |
| 2019-09-05 | 35495382002 | ND |
| 2019-09-05 | 35495382001 | ND |
| 2020-03-05 | 35535509001 | ND |
| 2020-03-05 | 35535509002 | ND |
| 2021-01-28 | 35608065001 | ND |
| 2021-01-28 | 35608065002 | ND |
| 2021-03-10 | 35618304001 | ND |
| 2021-03-10 | 35618304002 | ND |
| 2022-02-02 | 35694868001 | ND |
| 2022-02-02 | 35694870001 | ND |
| 2023-03-20 | 35787602001 | ND |
| 2023-03-20 | 35787604001 | ND |