Know Your Environment. Protect Your Health.

Benzo[a]pyrene

St Charles Water District 1 East Bank

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND80ND
2020ND20ND
2021ND40ND
2022ND50ND
2023ND40ND

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

Date Lab ID Result
2018-01-2335370117001ND
2018-01-2335370117001ND
2018-07-1735405500001ND
2018-07-1735405500001ND
2019-01-2235444037001ND
2019-01-2235444038001ND
2019-01-2235444037001ND
2019-01-2235444038001ND
2019-07-2535485229002ND
2019-07-2535485229001ND
2019-07-2535485229002ND
2019-07-2535485229001ND
2020-11-1035591297001ND
2020-11-1035591292001ND
2021-01-2835608065001ND
2021-01-2835608065002ND
2021-10-2535673766001ND
2021-10-2535673766002ND
2022-02-0235694868001ND
2022-02-0235694870001ND
2022-08-2435742576001ND
2022-08-2435742579001ND
2022-08-2435742769001ND
2023-03-2035787602001ND
2023-03-2035787604001ND
2023-11-2835844322001ND
2023-11-2835844330001ND