Environment

Air Quality Index (AQI)

Choose a country and city to open a detailed AQI page. Values use the US EPA scale, calculated from OpenAQ measurements when available. We never invent missing readings.

Snapshot

Highest & lowest city AQI

Based on the latest stored US EPA AQI for monitored cities (OpenAQ). Missing readings are excluded.

Highest Lahore Pakistan 288 Very Unhealthy Lowest Paris France 0 Good

Pakistan, India, and other pilot cities appear in this list even when OpenAQ data is delayed — the city page shows the current freshness status.

Published cities

22 cities currently meet freshness and validation checks for indexing.

Lahore Pakistan 288 Very Unhealthy Fresh Karachi Pakistan 96 Moderate Fresh Islamabad Pakistan 152 Unhealthy Fresh Peshawar Pakistan 163 Unhealthy Fresh Delhi India 185 Unhealthy Fresh Bengaluru India 57 Moderate Fresh Dhaka Bangladesh 163 Unhealthy Fresh Beijing China 3 Good Fresh Shanghai China 61 Moderate Fresh Shenzhen China 71 Moderate Fresh Riyadh Saudi Arabia 127 Unhealthy for Sensitive Groups Fresh Dubai United Arab Emirates 152 Unhealthy Fresh New York United States 38 Good Fresh Los Angeles United States 0 Good Fresh Chicago United States 87 Moderate Fresh Houston United States 76 Moderate Fresh Seattle United States 4 Good Fresh Denver United States 0 Good Fresh London United Kingdom 0 Good Fresh Paris France 0 Good Fresh Berlin Germany 2 Good Fresh Madrid Spain 10 Good Fresh

All monitored cities

Includes pilot cities (for example Pakistan and India) while OpenAQ freshness is still being validated. Pilot pages use noindex until published.

Sydney Australia · pilot 11 Good Fresh Melbourne Australia · pilot 17 Good Fresh Dhaka Bangladesh 163 Unhealthy Fresh Chattogram Bangladesh · pilot — Unavailable Unavailable São Paulo Brazil · pilot 83 Moderate Fresh Toronto Canada · pilot 2 Good Fresh Beijing China 3 Good Fresh Shanghai China 61 Moderate Fresh Guangzhou China · pilot 53 Moderate Unavailable Shenzhen China 71 Moderate Fresh Chengdu China · pilot 217 Very Unhealthy Unavailable Paris France 0 Good Fresh Berlin Germany 2 Good Fresh Delhi India 185 Unhealthy Fresh Mumbai India · pilot 128 Unhealthy for Sensitive Groups Unavailable Kolkata India · pilot 130 Unhealthy for Sensitive Groups Unavailable Bengaluru India 57 Moderate Fresh Chennai India · pilot 76 Moderate Unavailable Hyderabad India · pilot 94 Moderate Unavailable Jakarta Indonesia · pilot 163 Unhealthy Fresh Rome Italy · pilot 8 Good Fresh Tokyo Japan · pilot 18 Good Fresh Mexico City Mexico · pilot 0 Good Delayed Lahore Pakistan 288 Very Unhealthy Fresh Karachi Pakistan 96 Moderate Fresh Islamabad Pakistan 152 Unhealthy Fresh Peshawar Pakistan 163 Unhealthy Fresh Riyadh Saudi Arabia 127 Unhealthy for Sensitive Groups Fresh Jeddah Saudi Arabia · pilot 46 Good Unavailable Singapore Singapore · pilot 174 Unhealthy Fresh Seoul South Korea · pilot 39 Good Fresh Madrid Spain 10 Good Fresh Bangkok Thailand · pilot 109 Unhealthy for Sensitive Groups Fresh Istanbul Türkiye · pilot 85 Moderate Fresh Dubai United Arab Emirates 152 Unhealthy Fresh Abu Dhabi United Arab Emirates · pilot 137 Unhealthy for Sensitive Groups Unavailable London United Kingdom 0 Good Fresh New York United States 38 Good Fresh Los Angeles United States 0 Good Fresh Chicago United States 87 Moderate Fresh Houston United States 76 Moderate Fresh Seattle United States 4 Good Fresh Denver United States 0 Good Fresh

AQI FAQ

What AQI standard does ExploreCalcTools use?

US EPA AQI calculated from OpenAQ pollutant concentrations when available. Missing readings are never invented.

Which AQI city pages are indexed?

Only cities marked published are intended for search indexing. Pilot and candidate pages may use noindex until validation passes.

Where do the measurements come from?

Concentrations come from OpenAQ. Each city page shows observation time, retrieval time, station attribution, and freshness when available.