Air quality

Fresh PM2.5 readings around the world

Readings stream from the OpenAQ latest endpoint. Each bubble in the map shows the mean PM2.5 for that country based on the most recent hourly measurements we received, so you can see clean air corridors and hotspots at a glance.

Coverage

16 countries

Aggregated from 436 monitoring stations

Global average

18.7 µg/m³

Mean of country averages

Latest update

Dec 6, 2025

Local timestamp

World PM2.5 map

Average PM2.5 (µg/m³)

4.8 µg/m³

64.1 µg/m³

Click any country to reveal air quality and water access readings side by side.

Source: Static OpenAQ sample (offline mode: µg/m³). Click any country for paired air and water context.

Global rankings

Top 15 clean air champions

1. Finland
4.8 µg/m³
12 monitoring sites
2. Sweden
5.1 µg/m³
14 monitoring sites
3. Norway
5.5 µg/m³
10 monitoring sites
4. Canada
6.2 µg/m³
35 monitoring sites
5. Australia
7.9 µg/m³
18 monitoring sites
6. United States
8.5 µg/m³
50 monitoring sites
7. United Kingdom
10.2 µg/m³
19 monitoring sites
8. France
11.1 µg/m³
22 monitoring sites
9. Germany
12.3 µg/m³
30 monitoring sites
10. Japan
13.6 µg/m³
24 monitoring sites
11. Brazil
15.1 µg/m³
28 monitoring sites
12. Chile
17.8 µg/m³
16 monitoring sites
13. Mexico
22.4 µg/m³
18 monitoring sites
14. South Africa
39.2 µg/m³
20 monitoring sites
15. China
55.4 µg/m³
62 monitoring sites

City rankings

15 cleanest metro averages

1. Finland City
4.8 µg/m³
Finland • 12 sensors
2. Sweden City
5.1 µg/m³
Sweden • 14 sensors
3. Norway City
5.5 µg/m³
Norway • 10 sensors
4. Canada City
6.2 µg/m³
Canada • 35 sensors
5. Australia City
7.9 µg/m³
Australia • 18 sensors
6. United States City
8.5 µg/m³
United States • 50 sensors
7. United Kingdom City
10.2 µg/m³
United Kingdom • 19 sensors
8. France City
11.1 µg/m³
France • 22 sensors
9. Germany City
12.3 µg/m³
Germany • 30 sensors
10. Japan City
13.6 µg/m³
Japan • 24 sensors
11. Brazil City
15.1 µg/m³
Brazil • 28 sensors
12. Chile City
17.8 µg/m³
Chile • 16 sensors
13. Mexico City
22.4 µg/m³
Mexico • 18 sensors
14. South Africa City
39.2 µg/m³
South Africa • 20 sensors
15. China City
55.4 µg/m³
China • 62 sensors

15 heaviest PM2.5 loads

1. India City
64.1 µg/m³
India • 58 sensors
2. China City
55.4 µg/m³
China • 62 sensors
3. South Africa City
39.2 µg/m³
South Africa • 20 sensors
4. Mexico City
22.4 µg/m³
Mexico • 18 sensors
5. Chile City
17.8 µg/m³
Chile • 16 sensors
6. Brazil City
15.1 µg/m³
Brazil • 28 sensors
7. Japan City
13.6 µg/m³
Japan • 24 sensors
8. Germany City
12.3 µg/m³
Germany • 30 sensors
9. France City
11.1 µg/m³
France • 22 sensors
10. United Kingdom City
10.2 µg/m³
United Kingdom • 19 sensors
11. United States City
8.5 µg/m³
United States • 50 sensors
12. Australia City
7.9 µg/m³
Australia • 18 sensors
13. Canada City
6.2 µg/m³
Canada • 35 sensors
14. Norway City
5.5 µg/m³
Norway • 10 sensors
15. Sweden City
5.1 µg/m³
Sweden • 14 sensors

Cities reflect OpenAQ city fields; averages combine every monitor reporting during the latest fetch.

Methodology

Countries receive the average PM2.5 value across every OpenAQ location reporting during the last fetch. Lower values signal cleaner air; higher values trigger the smog ranking on the right.

Units are micrograms per cubic metre (µg/m³). The World Health Organization annual guideline is 5 µg/m³, so anything above that merits close monitoring.