Air Quality Data for Healthier Living

Monitor air quality in 1000+ cities worldwide. Get AQI at your location immediately.

Detecting your location...

Live Global Air Quality Map

Interactive real-time visualization of air pollution levels worldwide. Click any location to explore detailed air quality data.

Air Quality Index Scale

0-50 Good Air quality is satisfactory
51-100 Moderate Acceptable for most people
101-150 Unhealthy for Sensitive Sensitive groups may experience symptoms
151-200 Unhealthy Everyone may experience health effects
201-300 Very Unhealthy Health warnings for everyone
301+ Hazardous Emergency conditions

Understanding Air Pollution & Your Health

Air pollution is an invisible killer that affects every system in your body. Here's what you need to know to protect yourself and your family.

What Is Air Pollution?

Air pollution consists of harmful particles and gases including PM2.5, PM10, nitrogen dioxide (NO₂), sulfur dioxide (SO₂), ozone (O₃), and carbon monoxide (CO). These microscopic pollutants penetrate deep into your lungs and bloodstream.

  • PM2.5: Ultra-fine particles 30x smaller than hair width
  • PM10: Larger particles from dust, pollen, mold
  • NO₂: Gas from vehicle exhaust and power plants
  • O₃: Ground-level ozone, worse in hot weather

Health Impact by AQI Level

0-50
Good: Safe for everyone including children, elderly, and those with respiratory conditions.
51-100
Moderate: Unusually sensitive people may experience minor symptoms.
101-150
Unhealthy for Sensitive: Children, elderly, heart/lung disease patients should limit outdoor activities.
151-200
Unhealthy: Everyone may experience symptoms. Avoid outdoor exercise.
201-300
Very Unhealthy: Serious health effects for everyone. Stay indoors.
301+
Hazardous: Emergency conditions. Avoid all outdoor activities.

Protection Strategies

Simple actions can significantly reduce your exposure to harmful air pollution:

  • Check AQI daily: Plan outdoor activities when air quality is good
  • Exercise timing: Avoid rush hours (7-9 AM, 5-7 PM) when pollution peaks
  • Indoor air: Use air purifiers, keep windows closed on bad air days
  • Route planning: Choose less trafficked roads, walk away from busy streets
  • Masks work: N95 masks filter 95% of PM2.5 particles
  • Home improvements: Proper ventilation, avoid smoking indoors

Global Air Quality Rankings

Discover the world's cleanest and most polluted cities with real-time AQI data

Cleanest Cities

  • Loading real-time data...

Most Polluted Cities

  • Loading real-time data...

Popular Destinations

  • Loading real-time data...

Understanding Secondary Pollutants

Secondary pollutants form in the atmosphere through chemical reactions with primary pollutants, often creating more dangerous compounds than the original emissions

Ground-Level Ozone (O₃)

Formed when nitrogen oxides (NOₓ) react with volatile organic compounds (VOCs) in sunlight. Unlike protective ozone in the upper atmosphere, ground-level ozone is harmful to breathe and damages lung tissue.

Formation: NOₓ + VOCs + Sunlight → O₃
Peak Times: Hot, sunny afternoons
Health Effects: Respiratory irritation, reduced lung function

Secondary Particulate Matter

Fine particles (PM2.5) that form when gases like sulfur dioxide, nitrogen oxides, and ammonia react in the atmosphere. These particles are often more toxic than primary particles from direct emissions.

Formation: SO₂ + NH₃ + NOₓ → Sulfates & Nitrates
Characteristics: Ultra-fine, deeply penetrating
Health Effects: Cardiovascular disease, premature death

Photochemical Smog

A complex mixture of secondary pollutants including ozone, aldehydes, and peroxyacetyl nitrates (PANs). Forms through photochemical reactions in urban areas with high traffic and industrial emissions.

Key Components: O₃, NO₂, PANs, Aldehydes
Conditions: Sunny weather + Traffic emissions
Visibility: Brown haze over cities

Why Secondary Pollutants Matter

Regional Impact: Can travel hundreds of kilometers from their formation source, affecting rural areas far from pollution sources.
Weather Dependent: Formation rates vary with temperature, humidity, and sunlight, making them unpredictable.
Health Risks: Often more toxic than primary pollutants due to their chemical reactivity and smaller particle size.
Control Challenges: Require reducing multiple precursor pollutants, not just direct emissions.

Check AQI of My Location Instantly

Get the air quality index of your current location with GPS precision. Our advanced location detection system instantly shows you the AQI of my location so you can make informed decisions about outdoor activities, exercise, and health protection.

GPS Air Quality Detection: Automatically detects your location to show real-time AQI data
Real-Time Updates: Live air quality monitoring with hourly data updates
Health Recommendations: Personalized advice based on current air quality conditions

What is the AQI at My Current Location?

The air quality of my location is measured using the Air Quality Index (AQI), a standardized scale from 0-500. This instant GPS-based system shows you exactly what you're breathing right now, wherever you are.

0-50: Good - Safe for all outdoor activities
51-100: Moderate - Generally acceptable air quality
101-150: Unhealthy for Sensitive Groups
151-200: Unhealthy - Limit outdoor exposure
201-300: Very Unhealthy - Avoid outdoor activities
301+: Hazardous - Stay indoors

Why Check Air Quality of My Location?

Knowing the AQI of my location helps you protect your health by making informed decisions about when to exercise outdoors, when to close windows, and when sensitive groups should limit outdoor exposure. Use our GPS detection feature above to instantly check your current air quality.