p-Dichlorobenzene
City of Leon Valley
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 | 8 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2018-01-23 | AE09914 | ND |
| 2018-03-02 | AE16656 | ND |
| 2018-04-26 | AE24190 | ND |
| 2018-04-26 | AE24188 | ND |
| 2018-08-17 | AE37649 | ND |
| 2018-08-17 | AE37653 | ND |
| 2018-10-26 | AE44764 | ND |
| 2018-10-26 | AE44766 | ND |
| 2019-03-01 | AE56915 | ND |
| 2019-03-01 | AE56919 | ND |
| 2019-04-25 | AE63758 | ND |
| 2019-07-19 | AE75356 | ND |
| 2019-07-19 | AE75358 | ND |
| 2019-10-09 | AE86133 | ND |
| 2019-10-09 | AE86135 | ND |
| 2020-01-30 | AE96323 | ND |
| 2020-03-25 | AF04528 | ND |
| 2020-04-09 | AF06303 | ND |
| 2020-04-09 | AF06305 | ND |
| 2020-07-08 | AF18899 | ND |
| 2020-07-08 | AF18901 | ND |
| 2020-11-02 | AF32838 | ND |
| 2020-11-02 | AF32840 | ND |
| 2021-01-14 | AF39552 | ND |
| 2021-01-14 | AF39558 | ND |
| 2021-04-01 | AF48854 | ND |
| 2021-05-13 | AF53869 | ND |
| 2021-08-03 | AF64491 | ND |
| 2021-08-03 | AF64493 | ND |
| 2021-12-09 | AF78497 | ND |
| 2021-12-09 | AF78505 | ND |
| 2022-02-14 | AF84680 | ND |
| 2022-02-14 | AF84682 | ND |
| 2022-04-28 | AF94837 | ND |
| 2022-04-28 | AF94841 | ND |
| 2022-07-15 | AG04971 | ND |
| 2022-07-15 | AG04973 | ND |
| 2022-10-18 | AG17425 | ND |
| 2022-10-18 | AG17427 | ND |
| 2023-02-17 | AG29691 | ND |
| 2023-02-17 | AG29695 | ND |
| 2023-04-21 | AG37706 | ND |
| 2023-04-21 | AG37738 | ND |
| 2023-08-14 | AG52400 | ND |
| 2023-08-14 | AG52408 | ND |
| 2023-10-06 | AG58929 | ND |
| 2023-10-06 | AG58931 | ND |