Benzo(a)pyrene (PAH)

GENERAL INFORMATION
Benzo(a)pyrene is one of a group of compounds called polycyclic aromatic hydrocarbons. They are not produced or used commercially but are very commonly found since they are formed as a result of incomplete combustion of organic materials. The major source of benzo(a)pyrene in drinking water is leaching from linings of water storage tanks and distribution lines.

HEALTH EFFECTS
Some people who drink water containing benzo(a)pyrene well in excess of the maximum contaminant level (MCL) for many years may experience reproductive difficulties and may have an increased risk of cancer.

Standard value 1: 
0.20
Standard units 1: 
ppb
Input units: 
ug/L
ppb
Contaminant group: 
SVOC
Standard type 1: 
MCL
Action is recommended 1: 

MCL ADVISORY - ACTION IS HIGHLY RECOMMENDED
Benzo(a)pyrene levels were detected in your water sample to exceed the maximum contaminant level (MCL).

Action is optional 1: 

ACTION IS OPTIONAL
Benzo(a)pyrene levels were detected in your water sample but do not exceed the maximum contaminant level.

Typical range in Ohio: 
detection suggest human source
Major sources in drinking water: 
Leaching from linings of water storage tanks and distribution lines
Treatment options: 

TREATMENT OPTIONS
Granular Activated Carbon (GAC) or Powdered Activated Carbon (PAC) are considered the best available technologies (BAT) for treatment of many organic contaminants including organic pesticides, volatile organic compound (VOCs), and Trihalomethanes (THMs) (by-products of chlorination). Treatment can be at the tap (called point of use or POU) or the entire house.

Website resources: 

WEBSITE RESOURCES

Fact sheets: 

FACT SHEETS