p-Dichlorobenzene
Wallingford Water Department
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | 0.0833 ppb | 6 | 1 | ND - 0.500 ppb |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-01-28 | BG04311VOC1 | ND |
| 2014-05-08 | 2638-5VOC1 | ND |
| 2014-06-03 | 04990VOC1 | ND |
| 2014-06-03 | 04992VOC1 | ND |
| 2014-08-12 | BG92883VOC1 | ND |
| 2014-11-24 | 2697-05VOC1 | ND |
| 2015-04-13 | 2741-02VOC1 | ND |
| 2015-04-13 | 2741-04VOC1 | ND |
| 2015-06-01 | 2741-03VOC1 | ND |
| 2015-08-19 | 2787-02VOC1 | ND |
| 2015-11-03 | 2821-02VOC1 | ND |
| 2016-01-12 | 2844-02VOC1 | ND |
| 2016-01-12 | 2844-01VOC1 | 0.500 ppb |
| 2016-02-02 | 2844-06VOC1 | ND |
| 2016-04-19 | BN15871VOC1 | ND |
| 2016-08-09 | 12091VOC1 | ND |
| 2016-11-02 | 2968-02VOC1 | ND |
| 2017-01-19 | 3003-03VOC1 | ND |
| 2017-01-19 | 3003-01VOC1 | ND |
| 2017-03-16 | 3024-01VOC1 | ND |
| 2017-05-25 | BY29408VOC1 | ND |
| 2017-07-05 | BY53098VOC1 | ND |
| 2017-11-14 | BZ42532VOC1 | ND |
| 2018-03-05 | BZ98169 | ND |
| 2018-04-17 | CA21065 | ND |
| 2018-06-28 | CA80407 | ND |
| 2018-07-17 | CA91980 | ND |
| 2018-08-14 | CB11135 | ND |
| 2018-10-11 | CB69933 | ND |
| 2019-02-21 | CC55842-02 | ND |
| 2019-03-06 | CC62592-02 | ND |
| 2019-03-06 | CC62591-02 | ND |
| 2019-04-08 | CC90384 | ND |
| 2019-07-08 | CD51593 | ND |
| 2019-10-10 | CE30938-VOC | ND |