p-Dichlorobenzene
Southwood Water System
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 | 4 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 11 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-03-14 | ND | |
| 2018-03-14 | ND | |
| 2018-05-04 | ND | |
| 2018-07-19 | ND | |
| 2019-06-26 | ND | |
| 2019-07-12 | ND | |
| 2019-07-12 | ND | |
| 2019-09-05 | ND | |
| 2019-10-15 | ND | |
| 2021-03-12 | 4164633 | ND |
| 2021-03-12 | 4166774 | ND |
| 2021-03-17 | 4205286 | ND |
| 2022-01-26 | 4240241 | ND |
| 2022-01-26 | 4240240 | ND |
| 2022-01-26 | 4240242 | ND |
| 2022-01-27 | 4240239 | ND |
| 2022-02-04 | 4240245 | ND |
| 2022-02-04 | 4240244 | ND |
| 2022-10-11 | 4465087 | ND |
| 2022-10-17 | 4370660 | ND |
| 2022-10-31 | 4465043 | ND |
| 2022-10-31 | 4464989 | ND |
| 2022-11-14 | 4382866 | ND |
| 2023-03-14 | 4437411 | ND |
| 2023-03-14 | 4437441 | ND |
| 2023-09-26 | 4532910 | ND |