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EWG's Tap Water Database — 2019 UPDATE

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Benzo[a]pyrene

City of South Houston

Benzo[a]pyrene is a polycyclic aromatic hydrocarbon, or PAH, released from combustion of fossil fuels and waste incinerators. PAHs increase the risk of cancer; damage the immune, nervous and reproductive systems; and can harm developing fetuses.

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND50ND
2014ND50ND
2015ND70ND
2016ND60ND
2017ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.007 ppb

The EWG Health Guideline of 0.007 ppb for benzo[a]pyrene 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) 0.2 ppb

The legal limit for benzo[a]pyrene, established in 1992, 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 PAH exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-02-06AB80276ND
2012-02-06AB80275ND
2012-02-06AB80271ND
2012-02-06AB80274ND
2012-02-06AB80267ND
2013-01-14AC07648ND
2013-01-14AC07649ND
2013-01-14AC07650ND
2013-01-14AC07644ND
2013-01-14AC07647ND
2014-01-14AC38903ND
2014-01-14AC38904ND
2014-01-14AC38908ND
2014-01-14AC38906ND
2014-01-14AC38905ND
2015-01-21AC77137ND
2015-01-21AC77131ND
2015-01-21AC77136ND
2015-01-21AC77129ND
2015-01-21AC77130ND
2015-09-15AD07180ND
2015-10-06AD09652ND
2016-01-14AD18395ND
2016-01-14AD18382ND
2016-01-14AD18385ND
2016-01-14AD18388ND
2016-01-14AD18391ND
2016-04-08AD32661ND
2017-01-06AD63756ND
2017-02-10AD70495ND
2017-03-01AD72880ND
2017-03-01AD72881ND
2017-03-01AD72879ND