p-Dichlorobenzene
Whitworth Water District 2
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 | 13 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 11 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-03-20 | ND | |
| 2019-04-18 | ND | |
| 2019-04-18 | ND | |
| 2019-04-18 | ND | |
| 2019-04-18 | ND | |
| 2019-05-09 | ND | |
| 2019-05-21 | ND | |
| 2019-05-21 | ND | |
| 2019-05-28 | ND | |
| 2019-05-28 | ND | |
| 2019-05-28 | ND | |
| 2019-05-28 | ND | |
| 2019-06-18 | ND | |
| 2019-06-21 | ND | |
| 2021-03-18 | 4094088 | ND |
| 2021-07-08 | 4138074 | ND |
| 2021-10-28 | 4196693 | ND |
| 2022-01-24 | 4236842 | ND |
| 2022-03-31 | 4261610 | ND |
| 2022-04-21 | 4272380 | ND |
| 2022-04-21 | 4272384 | ND |
| 2022-05-18 | 4288406 | ND |
| 2022-06-27 | 4309800 | ND |
| 2022-06-27 | 4309802 | ND |
| 2022-07-14 | 4309807 | ND |
| 2022-07-14 | 4309808 | ND |
| 2022-07-14 | 4309809 | ND |
| 2022-10-11 | 4356380 | ND |
| 2023-04-27 | 4452170 | ND |