p-Dichlorobenzene
Hca Roan Filter Plant
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 | 2 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-10-30 | 8111439-01 | ND |
| 2019-10-24 | 9105284-01 | ND |
| 2020-06-17 | 22436153.00 | ND |
| 2020-10-19 | 23201734.00 | ND |
| 2021-01-07 | 23731034.00 | ND |
| 2021-04-08 | 24266639.00 | ND |
| 2021-07-01 | 24848282.00 | ND |
| 2021-10-20 | 25424852.00 | ND |
| 2022-05-26 | 26669372.00 | ND |
| 2023-02-28 | 28541387.00 | ND |
| 2023-05-02 | 28921497.00 | ND |
| 2023-05-24 | 28921751.00 | ND |
| 2023-08-22 | 29719414.00 | ND |
| 2023-11-14 | 30089980.00 | ND |