p-Dichlorobenzene
Conyngham Water Company
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 | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-04-17 | 7048808001 | ND |
| 2018-04-17 | 7048808002 | ND |
| 2018-04-17 | 7048808003 | ND |
| 2019-03-12 | 1903-156-2 | ND |
| 2019-03-12 | 19030-156-1 | ND |
| 2019-03-12 | 1903-156-1 | ND |
| 2020-03-02 | 21862229.00 | ND |
| 2020-03-02 | 21862209.00 | ND |
| 2020-03-02 | 21862189.00 | ND |
| 2020-03-02 | 21862169.00 | ND |
| 2020-03-02 | 21862149.00 | ND |
| 2021-06-01 | 24454889.00 | ND |
| 2021-06-01 | 24454869.00 | ND |
| 2021-06-01 | 24454909.00 | ND |
| 2022-04-04 | 26478816.00 | ND |
| 2022-04-04 | 26478836.00 | ND |
| 2022-04-04 | 26478856.00 | ND |
| 2023-03-06 | 28536374.00 | ND |
| 2023-03-06 | 28536394.00 | ND |
| 2023-03-06 | 28536414.00 | ND |
| 2023-12-12 | 30259324.00 | ND |
| 2023-12-12 | 30259304.00 | ND |