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EWG's Tap Water Database — 2019 UPDATE

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Benzo[a]pyrene

Water District 1 of Johnson County

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND40ND
2014ND30ND
2015N/A00N/A
2016N/A00N/A
2017ND30ND

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
2012-05-22MAY2012-SOC-TP2ND
2012-05-22MAY2012-SOC-TP3ND
2012-05-30MAY2012-SOC-TP1ND
2013-05-01MAY2013-OC-TP3ND
2013-05-01MAY2013-OC-TP2ND
2013-05-01MAY2013-OC-TP1ND
2013-07-08JUL2013-OC-TP1ND
2014-05-07MAY2014-OC-TP1ND
2014-05-07MAY2014-OC-TP2ND
2014-05-07MAY2014-OC-TP3ND
2017-05-16MAY2017--TP2 EURND
2017-05-16MAY2017--TP3 EURND
2017-07-12JUL2017--TP1 EURND