United States Ozone (O₃) Level
See Air Quality ofUnited States
MapUnited States
Do you know that Ozone's total mass is 3 billion metric tons in the atmosphere? It looks like a lot but has only 0.00006% of the atmosphere. Besides, Ozone's peak concentration is 32 kilometres above the Earth's surface.
Most Polluted Cities 2026
United States
Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Grand Canyon Village, Arizona
Moderate
1xabove Standard
2.
Moab, Utah
Moderate
1xabove Standard
3.
Rapid City, South Dakota
Good
1xbelow Standard
4.
Kamiah, Idaho
Good
1xbelow Standard
5.
Chiriaco Summit, California
Good
1xbelow Standard
6.
Estes Park, Colorado
Good
1xbelow Standard
7.
Woodlake, California
Good
1xbelow Standard
8.
Grand Junction, Colorado
Good
1xbelow Standard
9.
Littleton, Colorado
Good
1xbelow Standard
10.
Mecca, California
Good
1xbelow Standard
Last Updated: 19 Jul 2026, 11:33 AM
AQI City RankingsUncovering the Sources of Ozone (O₃): Where Does It Come From?
Refineries
Industrial processes emit substances.
Power plants
Emissions from burning fossil fuels.
Paints evaporations
Vocs from paints react with sunlight.
Transportation
Diesel operated vehicles reacts and form ozone.Short-Term O₃ Exposure Impacts
Chest pain
Discomfort or pain in the chest due to respiratory stress.
Breathing shortness
Difficulty in breathing or feeling of breathlessness.
Respiratory irritation
Inflammation and irritation of the respiratory tract.
Wheezing and coughing
Whistling sound and persistent cough.
Trigger asthma attacks
Aggravation of asthma symptoms.Why you should care about Ozone (O₃)?
Know More About O₃ Sensor
