p-Dichlorobenzene

City of Caldwell

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	3	ND
2015	ND	3	ND
2016	ND	13	ND
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	7	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
2014-06-18	V1422594	ND
2014-09-29	V1438512	ND
2014-11-13	V1445335	ND
2015-03-10	V1509143	ND
2015-05-06	V1517379	ND
2015-09-24	V1541055	ND
2016-10-12	V1647131	ND
2016-10-12	V1647132	ND
2016-10-12	V1647133	ND
2016-10-12	V1647134	ND
2016-10-12	V1647135	ND
2016-10-13	V1647137	ND
2016-10-13	V1647136	ND
2016-10-13	V1647138	ND
2016-10-13	V1647139	ND
2016-10-13	V1647140	ND
2016-10-13	V1647141	ND
2016-10-13	V1647142	ND
2016-10-19	V1647952	ND
2019-08-06	V1938597	ND
2019-08-06	V1938594	ND
2019-08-19	V1941179	ND
2019-08-19	V1941177	ND
2019-08-19	V1941174	ND
2019-08-19	V1941183	ND
2019-08-19	V1941181	ND