p-Dichlorobenzene
Rothschild Waterworks
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 | 5 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-13 | 1044837 | ND |
| 2018-06-19 | 1062274 | ND |
| 2018-06-19 | 1062272 | ND |
| 2018-09-11 | 1079505 | ND |
| 2018-11-13 | 1092763 | ND |
| 2019-04-23 | 1116903 | ND |
| 2019-05-07 | 1119529 | ND |
| 2019-08-27 | 1144005 | ND |
| 2019-08-27 | 1144003 | ND |
| 2019-10-29 | 1157914 | ND |
| 2020-08-10 | 1205736 | ND |
| 2020-08-10 | 1205729 | ND |
| 2021-08-03 | 1269115 | ND |
| 2022-07-19 | 1324684 | ND |
| 2023-05-22 | CB05354-03 | ND |
| 2023-08-28 | CB10306-02 | ND |