p-Dichlorobenzene
Aqua Pa Beech Mountain
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 2 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 0.125 ppb | 4 | 1 | ND - 0.500 ppb |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2020-07-30 | 22625023.00 | ND |
| 2020-07-30 | 22625046.00 | ND |
| 2022-03-22 | 26304583.00 | ND |
| 2022-05-25 | 26667152.00 | ND |
| 2022-07-27 | 27055317.00 | ND |
| 2022-10-27 | 27839633.00 | 0.500 ppb |
| 2023-02-14 | 28365210.00 | ND |
| 2023-05-23 | 28919506.00 | ND |
| 2023-05-23 | 28919533.00 | ND |