p-Dichlorobenzene
South Middleton Twp Water Authority
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 | 3 | 0 | ND |
| 2021 | ND | 9 | 0 | ND |
| 2022 | ND | 9 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-05-15 | 8052993-01 | ND |
| 2018-05-15 | 8052993-02 | ND |
| 2018-05-15 | 8052993-03 | ND |
| 2019-05-14 | 9052836-02 | ND |
| 2019-05-14 | 9052836-03 | ND |
| 2019-05-14 | 9052836-01 | ND |
| 2020-05-14 | 22355420.00 | ND |
| 2020-05-14 | 22355399.00 | ND |
| 2020-05-14 | 22355378.00 | ND |
| 2021-02-17 | 24007053.00 | ND |
| 2021-02-17 | 24007005.00 | ND |
| 2021-02-17 | 24007029.00 | ND |
| 2021-05-18 | 24579632.00 | ND |
| 2021-05-18 | 24579681.00 | ND |
| 2021-05-18 | 24579657.00 | ND |
| 2021-08-17 | 25164849.00 | ND |
| 2021-08-17 | 25164898.00 | ND |
| 2021-08-17 | 25164874.00 | ND |
| 2022-05-17 | 26788399.00 | ND |
| 2022-05-17 | 26788448.00 | ND |
| 2022-05-17 | 26788424.00 | ND |
| 2022-08-23 | 27587385.00 | ND |
| 2022-08-23 | 27587386.00 | ND |
| 2022-08-23 | 27587384.00 | ND |
| 2022-11-16 | 27948226.00 | ND |
| 2022-11-16 | 27948250.00 | ND |
| 2022-11-16 | 27948201.00 | ND |
| 2023-03-30 | 28650583.00 | ND |
| 2023-03-30 | 28650632.00 | ND |
| 2023-03-30 | 28650608.00 | ND |
| 2023-05-25 | 29247739.00 | ND |
| 2023-05-25 | 29247738.00 | ND |
| 2023-05-25 | 29247737.00 | ND |