St. Gallen air quality index (AQI) and PM2.5 air pollution

11:47, Apr 6 (local time)

Good

Moderate

Unhealthy for sensitive groups

Unhealthy

Very unhealthy

Hazardous

St. Gallen AQI Ranking

US AQI

PM2.5

#MAJOR CITYUS AQI

1

127

2

54

3

51

4

46

5

46

6

46

7

46

8

46

9

46

10

46

SEE WORLD AQI RANKING

Most polluted cities

See a ranking of 2019’s most polluted cities.

Most polluted countries

See a ranking of 2019’s most polluted countries.

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