Compare Air Quality

Enter up to 4 cities to compare AQI side by side.

Separate city names with commas

Seoul

PM2.582 µg/m³
PM1042 µg/m³
O₃38.6 ppm
NO₂12.8 ppb
SO₂4.1 ppb
CO3.7 ppm
Full details →

Tokyo

PM2.582 µg/m³
PM1042 µg/m³
O₃38.6 ppm
NO₂12.8 ppb
SO₂4.1 ppb
CO3.7 ppm
Full details →

Beijing

PM2.582 µg/m³
PM1042 µg/m³
O₃38.6 ppm
NO₂12.8 ppb
SO₂4.1 ppb
CO3.7 ppm
Full details →

Cleanest air

Seoul

AQI 82

Most polluted

Seoul

AQI 82

Seoul — Health Advice

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

General Public: Air quality is acceptable for most people.
Children: Unusually sensitive children should limit prolonged outdoor play.
Heart Conditions: Unusually sensitive people should consider reducing exertion.

Tokyo — Health Advice

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

General Public: Air quality is acceptable for most people.
Children: Unusually sensitive children should limit prolonged outdoor play.
Heart Conditions: Unusually sensitive people should consider reducing exertion.

Beijing — Health Advice

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

General Public: Air quality is acceptable for most people.
Children: Unusually sensitive children should limit prolonged outdoor play.
Heart Conditions: Unusually sensitive people should consider reducing exertion.