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EWG's Tap Water Database — 2019 UPDATE

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Benzo[a]pyrene

City of Gilroy

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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND180ND
2013N/A00N/A
2014N/A00N/A
2015ND180ND
2016N/A00N/A
2017N/A00N/A

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
2012-05-215810-001-0850ND
2012-05-215810-006-1315ND
2012-05-215810-002-1135ND
2012-05-215810-004-1045ND
2012-05-225810-009-1035ND
2012-05-225810-010-1115ND
2012-05-225810-008-0955ND
2012-05-225810-007-0745ND
2012-05-225810-011-0835ND
2012-08-225810-001-0845ND
2012-08-225810-002-1025ND
2012-08-225810-004-1000ND
2012-08-225810-006-1325ND
2012-08-225810-008-1050ND
2012-08-225810-009-1110ND
2012-08-225810-011-1300ND
2012-08-235810-010-0855ND
2012-08-235810-007-0825ND
2015-05-205810-007-1300ND
2015-05-205810-008-1025ND
2015-05-205810-006-0945ND
2015-05-205810-009-1100ND
2015-05-205810-010-0810ND
2015-05-215810-004-1250ND
2015-05-215810-002-1010ND
2015-05-215810-011-0955ND
2015-05-215810-001-0800ND
2015-08-195810-007-1120ND
2015-08-195810-008-1019ND
2015-08-195810-004-1320ND
2015-08-195810-009-1044ND
2015-08-195810-002-1250ND
2015-08-195810-010-1203ND
2015-08-195810-001-1225ND
2015-08-195810-006-0948ND
2015-08-205810-011-0845ND