p-Dichlorobenzene

San Antonio Water Company

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	N/A	0	N/A
2015	N/A	0	N/A
2016	ND	11	ND
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	10	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
2016-07-19	3761-001-0945	ND
2016-07-19	3761-018-1122	ND
2016-07-19	3761-017-1143	ND
2016-07-19	3761-003-1215	ND
2016-07-19	3761-013-1153	ND
2016-07-19	3761-011-1228	ND
2016-07-26	3761-021-1200	ND
2016-07-26	3761-016-1352	ND
2016-07-26	3761-010-0908	ND
2016-07-26	3761-004-0940	ND
2016-07-26	3761-002-1030	ND
2019-07-15	3761-010-1945	ND
2019-07-16	3761-011-1250	ND
2019-07-16	3761-013-1350	ND
2019-07-16	3761-003-1305	ND
2019-07-16	3761-016-1200	ND
2019-07-16	3761-002-1140	ND
2019-07-16	3761-017-1330	ND
2019-07-16	3761-018-1130	ND
2019-07-16	3761-001-1100	ND
2019-07-17	3761-004-0800	ND