Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Photochemical oxidants are air pollutants formed through chemical reactions involving sunlight, nitrogen oxides, and volatile organic compounds (VOCs). They contribute to the formation of smog and can have harmful effects on human health.
Related terms
Volatile Organic Compounds (VOCs): VOCs are organic chemicals that easily evaporate into the air. When combined with nitrogen oxides and sunlight, they contribute to the formation of photochemical oxidants.
Ground-level ozone is a type of photochemical oxidant formed when sunlight reacts with nitrogen oxides and VOCs. It is a major component of smog.
Air Quality Index (AQI): The AQI measures levels of various air pollutants, including photochemical oxidants, to provide information about air quality and potential health risks.