p-Dichlorobenzene
Red Hill Water Authority
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 | 6 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 7 | 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 |
|---|---|---|
| 2018-02-07 | 8001980-01 | ND |
| 2018-04-25 | 8008151-01 | ND |
| 2018-07-17 | 8017901-01 | ND |
| 2018-08-07 | 8021854-01 | ND |
| 2018-10-22 | 8028636-01 | ND |
| 2019-02-06 | 9002686-01 | ND |
| 2019-05-07 | 9009679-01 | ND |
| 2019-06-25 | 9022004-01 | ND |
| 2019-08-21 | 9025620-01 | ND |
| 2019-09-24 | 9021809-01 | ND |
| 2019-12-16 | 9033958-01 | ND |
| 2020-03-20 | 21848612.00 | ND |
| 2020-03-20 | 21848611.00 | ND |
| 2020-04-28 | 22024532.00 | ND |
| 2020-04-29 | 22024533.00 | ND |
| 2020-06-24 | 22417775.00 | ND |
| 2020-07-01 | 22417776.00 | ND |
| 2020-10-06 | 23183758.00 | ND |
| 2021-02-03 | 23713937.00 | ND |
| 2021-02-17 | 23889898.00 | ND |
| 2021-03-24 | 24061452.00 | ND |
| 2021-04-21 | 24248869.00 | ND |
| 2021-07-07 | 24830272.00 | ND |
| 2021-10-05 | 25405992.00 | ND |
| 2022-01-10 | 25943922.00 | ND |
| 2022-02-01 | 25944045.00 | ND |
| 2022-02-28 | 26118852.00 | ND |
| 2022-04-05 | 26465239.00 | ND |
| 2022-08-02 | 27235128.00 | ND |
| 2022-08-16 | 27235150.00 | ND |
| 2022-10-25 | 27642628.00 | ND |
| 2023-01-30 | 28350410.00 | ND |
| 2023-01-31 | 28350409.00 | ND |
| 2023-04-03 | 28703631.00 | ND |
| 2023-07-03 | 29302953.00 | ND |
| 2023-10-03 | 29887678.00 | ND |