p-Dichlorobenzene
City of Chico
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 | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 3 | 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 |
|---|---|---|
| 2018-12-13 | Q1851676003 | ND |
| 2018-12-13 | Q1851676006 | ND |
| 2018-12-13 | Q1851676001 | ND |
| 2019-01-08 | Q1900653001 | ND |
| 2019-01-08 | Q1900653006 | ND |
| 2019-01-08 | Q1900653010 | ND |
| 2020-03-02 | Q2007727001 | ND |
| 2020-06-01 | Q2021442001 | ND |
| 2020-08-19 | Q2033209003 | ND |
| 2020-08-19 | Q2033209001 | ND |
| 2021-08-11 | Q2121372007 | ND |
| 2021-08-11 | Q2121372009 | ND |
| 2021-08-11 | Q2121372011 | ND |
| 2022-09-08 | Q2226813001 | ND |
| 2022-09-08 | Q2226813003 | ND |
| 2022-09-08 | Q2226813005 | ND |
| 2023-05-30 | Q2319948009 | ND |
| 2023-05-30 | Q2319948011 | ND |
| 2023-05-30 | Q2319948013 | ND |