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EWG's Tap Water Database — 2021 UPDATE

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Benzene

Gonzales County Water Supply Corporation

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND50ND
2016ND30ND
2017ND30ND
2018ND40ND
2019ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.15 ppb

The EWG 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.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for benzene, established in 1987, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to benzene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-20AC43865ND
2014-06-05AC56103ND
2014-09-05AC66060ND
2015-02-04AC79291ND
2015-02-04AC79275ND
2015-02-04AC79273ND
2015-02-04AC79281ND
2015-07-22AD00644ND
2016-01-19AD18620ND
2016-01-19AD18652ND
2016-09-09AD49182ND
2017-03-13AD75502ND
2017-03-13AD75498ND
2017-03-13AD75500ND
2018-02-08AE13037ND
2018-03-12AE17864ND
2018-03-12AE17882ND
2018-03-12AE17842ND
2019-01-09AE49237ND
2019-01-09AE49241ND