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EWG's Tap Water Database

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Benzene

Clearwater Water System

Benzene is a known human carcinogen. It also damages blood cells and the nervous system. Emissions from petroleum processing, hazardous waste landfills and underground storage tanks contaminate drinking water with benzene. Read More.

To protect against cancer risks, California set a public health goal for benzene in drinking water at 0.15 parts per billion, 30 times lower than the federal legal limit of 5 parts per billion.

Click here to read more about carcinogenic VOCs.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND30ND
2011ND30ND
2012ND30ND
2013ND30ND
2014ND10ND
2015ND50ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.15 ppb

The health guideline of 0.15 ppb for benzene 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) 5 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
2011-02-16ND
2011-02-16ND
2011-02-16ND
2012-02-10ND
2012-02-10ND
2012-02-10ND
2013-02-01ND
2013-02-01ND
2013-02-01ND
2014-02-13ND
2015-01-13ND
2015-01-13ND
2015-05-07ND
2015-09-23ND
2015-11-18ND