p-Dichlorobenzene
Westchester County Water District #3
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 5 | 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 |
|---|---|---|
| 2018-09-24 | AU20759POCS | ND |
| 2019-11-12 | AV23848POCS | ND |
| 2020-04-28 | AW07856POCS | ND |
| 2020-11-09 | AW21633POCS | ND |
| 2020-12-15 | AW23893-POCS | ND |
| 2020-12-15 | AW23891-POCS | ND |
| 2021-04-06 | AX06359-POCS | ND |
| 2021-09-20 | AX19180-POCS-WD3 | ND |
| 2021-09-20 | AX19184-POCS-WD3 | ND |
| 2021-11-09 | AX22573-POCS | ND |
| 2021-11-09 | AX22576-POCS | ND |
| 2022-04-11 | AY05984-POCS | ND |
| 2022-10-24 | AY19125-POCS-WD3 | ND |
| 2022-10-24 | AY19127-POCS-WD3 | ND |
| 2022-11-01 | AY19681-POCS | ND |
| 2022-11-01 | AY19679-POCS | ND |
| 2023-04-25 | AZ07359--POCS | ND |
| 2023-10-19 | AZ19385-POCS-WD3 | ND |
| 2023-10-19 | AZ19384-POCS-WD3 | ND |
| 2023-11-01 | AZ20238-POCS | ND |
| 2023-11-01 | AZ20240-POCS | ND |