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EWG's Tap Water Database — 2019 UPDATE

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Benzo[a]pyrene

Carroll-Boone Water District

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND40ND
2014ND10ND
2015ND10ND
2016ND20ND
2017ND10ND

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
2012-04-1812111002001ND
2013-01-1713018006007ND
2013-04-0913102000907ND
2013-07-0913192012001ND
2013-10-2213297002201ND
2014-02-2614059001601ND
2015-03-2415085003401ND
2016-02-0316036006407ND
2016-06-0716160000601ND
2017-01-181701748-003AND