Air quality in Uusimaa

Air quality index (AQI⁺) and PM2.5 air pollution in Uusimaa • 09:26, Aug 04

Live most polluted city ranking

Real-time Uusimaa most polluted city ranking

#	Cities	AQI⁺ US
1	Helsinki	37
2	Kallio	36
3	Espoo	35
4	Mellunkylae	35
5	Vantaa	28
6	Kaarela	26
7	Otaniemi	26
8	Jaervenpaeae	24
9	Porvoo	24
10	Lohja	18

Live cleanest city ranking

Real-time Uusimaa cleanest city ranking

#	Cities	AQI⁺ US
1	Lohja	18
2	Jaervenpaeae	24
3	Porvoo	24
4	Kaarela	26
5	Otaniemi	26
6	Vantaa	28
7	Espoo	35
8	Mellunkylae	35
9	Kallio	36
10	Helsinki	37

Western US Air Quality Alert

Close-up of an intense, blazing wildfire.

Wildfire Map Spotlight: Big Grass Fire, Oregon and Idaho

Wildfire Map Spotlight: Kaiser Canyon Fire, Washington

Which is the most polluted city in Uusimaa?

globe background

Connect With IQAir

Get exclusive articles, product updates, tips, and occasional offers delivered to your inbox. You can unsubscribe at any time.

GSA contract holder

View Privacy Policy

Privacy Policy© 2026 IQAir. All rights reserved