Know Your Environment. Protect Your Health.

Benzo[a]pyrene

Bonney Lake Water Department

NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for benzo[a]pyrene. Sample information shown below was taken by City of Tacoma.

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021ND40ND
2022ND30ND
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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

NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for benzo[a]pyrene. Sample information shown below was taken by City of Tacoma.

Date Lab ID Result
2021-06-214149654ND
2021-06-214149653ND
2021-06-304143018ND
2021-06-304143019ND
2021-07-014149655ND
2021-07-214159386ND
2021-07-214159385ND
2021-07-224159384ND
2022-02-014259184ND
2022-09-154370819ND
2022-11-154383777ND