p-Dichlorobenzene
Marble Community 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 | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 3 | 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 |
|---|---|---|
| 2018-03-19 | 92377444001VOC | ND |
| 2020-03-16 | 92469616001_12710 | ND |
| 2021-03-29 | 92530231001A_12710 | ND |
| 2021-06-15 | 92544634001_12710 | ND |
| 2021-08-11 | 92555441001_12710 | ND |
| 2021-10-19 | 92567887001_12710 | ND |
| 2022-02-09 | 92587505001_12710 | ND |
| 2022-05-11 | 92604135001_12710 | ND |
| 2022-09-12 | 2093908-01 | ND |
| 2023-07-10 | 37729_23-36797 | ND |
| 2023-07-10 | 37729_23-36799 | ND |