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EWG's Tap Water Database

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Hexachlorobenzene (HCB)

Clearwater Water System

Hexachlorobenzene is a cancer-causing, neurotoxic and hormone-disrupting chemical used as a pesticide until 1984. It is still found in landfills and hazardous waste sites, and can be detected in people.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND60ND
2011ND60ND
2012ND60ND
2013ND30ND
2014ND30ND
2015ND40ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.03 ppb

The health guideline of 0.03 ppb for hexachlorobenzene 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 1 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Result
2010-02-10ND
2010-02-10ND
2010-02-11ND
2010-08-17ND
2010-08-17ND
2010-08-17ND
2011-02-16ND
2011-02-16ND
2011-02-16ND
2011-08-26ND
2011-08-26ND
2011-08-26ND
2012-02-10ND
2012-02-10ND
2012-02-10ND
2012-07-13ND
2012-07-13ND
2012-07-13ND
2013-02-01ND
2013-02-01ND
2013-02-01ND
2014-02-13ND
2014-08-14ND
2014-08-14ND
2015-01-13ND
2015-01-13ND
2015-05-07ND
2015-07-29ND