Human exposures to PAHs: an eastern United States pilot study.

Area of Science:

• Environmental Health
• Exposure Science
• Public Health

Background:

• Polycyclic Aromatic Hydrocarbons (PAHs) are common environmental pollutants.
• Human exposure assessment is crucial for understanding health risks.

Purpose of the Study:

• To estimate personal exposure to PAHs for diverse subpopulations.
• To compare PAH exposure levels across urban, suburban, and rural settings.

Main Methods:

• Conducted the National Human Exposure Assessment Survey (NHEXAS) Pilot Study in Maryland.
• Collected 24-hour personal PM(10) air samples from 233 participants (children and adults).
• Speciated eight PAHs and total carcinogenic PAHs using personal environmental monitors.

Main Results:

• Approximately 50% of samples showed detectable concentrations of 3-5 individual PAHs.
• Exposure concentrations varied between rural and urban/suburban residents.
• Mean benzo(a)pyrene concentration was 0.10 ng/m(3), below WHO guidelines.

Conclusions:

• Personal PAH exposure is common, with variations based on geographic setting.
• Benzo(a)pyrene exposure levels were below established air quality guidelines.
• Findings contribute to understanding environmental exposure in human populations.