p-Dichlorobenzene
North Castle Water District #5
NOTE: North Castle Water District #5 purchases water from North Castle Water District #4 which is required to test for p-dichlorobenzene. Sample information shown below was taken by North Castle Water District #4.
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 | 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
NOTE: North Castle Water District #5 purchases water from North Castle Water District #4 which is required to test for p-dichlorobenzene. Sample information shown below was taken by North Castle Water District #4.
| Date | Lab ID | Result |
|---|---|---|
| 2020-02-25 | AW03861-POCS | ND |
| 2020-02-25 | AW03853-POCS | ND |
| 2020-02-25 | AW03855-POCS | ND |
| 2020-06-24 | AW11974-POCS | ND |
| 2020-06-24 | AW11976-POCS | ND |
| 2020-06-24 | AW11975-POCS | ND |
| 2020-06-24 | AW11973-POCS | ND |
| 2020-07-13 | AW13180-POCS | ND |
| 2020-09-04 | AW17235-POCS | ND |
| 2020-09-04 | AW17230-POCS | ND |
| 2020-09-04 | AW17233-POCS | ND |
| 2020-09-04 | AW17234-POCS | ND |
| 2021-03-02 | AX04052-POCS | ND |
| 2021-03-03 | AX04224-POCS | ND |
| 2021-03-03 | AX04226-POCS | ND |
| 2021-07-06 | AX13097-POCS | ND |
| 2022-03-01 | AY03618-POCS | ND |
| 2022-03-01 | AY03622-POCS | ND |
| 2022-03-01 | AY03616-POCS | ND |
| 2022-07-19 | AY12490-POCS | ND |
| 2023-03-21 | AZ05015-POCS | ND |
| 2023-03-21 | AZ05017-POCS | ND |
| 2023-03-22 | AZ05102-POCS | ND |
| 2023-07-25 | AZ13469-POCS | ND |
| 2023-08-01 | AZ14120-POCS | ND |
| 2023-08-01 | AZ14121-POCS | ND |
| 2023-09-05 | AZ 16355-POCS | ND |
| 2023-09-05 | AZ 16358-POCS | ND |