Curated search · Environment

Countries With the Cleanest Air.

The WHO’s 2021 guideline tightened to PM2.5 annual mean of 5 µg/m³. Almost no country meets it. The threshold here is 10 µg/m³ — still cleaner than the WHO’s prior interim guideline, and a meaningful global filter.

34 matchesAir quality10

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34 countries match

Ranked by composite

Where in the world

34 countries

Europe16
Americas7
Asia1
Africa2
Oceania8

1
Finland
100
Air quality 4.9 µg/m³
2
Iceland
97
Air quality 5.1 µg/m³
3
Sweden
94
Air quality 5.6 µg/m³
4
Tuvalu
91
Air quality 5.9 µg/m³
5
Norway
88
Air quality 6.1 µg/m³
6
Nauru
85
Air quality 6.1 µg/m³
7
Estonia
82
Air quality 6.1 µg/m³
8
New Zealand
79
Air quality 6.5 µg/m³
9
Greenland
76
Air quality 6.6 µg/m³
10
Canada
74
Air quality 6.6 µg/m³
11
American Samoa
71
Air quality 6.7 µg/m³
12
Puerto Rico
68
Air quality 7.2 µg/m³
13
Palau
65
Air quality 7.3 µg/m³
14
Bermuda
62
Air quality 7.3 µg/m³
15
Brunei
59
Air quality 7.6 µg/m³
16
United States
56
Air quality 7.8 µg/m³
17
Ireland
53
Air quality 8.2 µg/m³
18
Australia
50
Air quality 8.3 µg/m³
19
Portugal
47
Air quality 8.5 µg/m³
20
Seychelles
44
Air quality 8.5 µg/m³
21
Saint Kitts and Nevis
41
Air quality 8.6 µg/m³
22
United States Virgin Islands
38
Air quality 8.6 µg/m³
23
Luxembourg
35
Air quality 8.7 µg/m³
24
Switzerland
32
Air quality 9.1 µg/m³
25
Denmark
29
Air quality 9.1 µg/m³
26
Andorra
26
Air quality 9.1 µg/m³
27
Mauritius
24
Air quality 9.2 µg/m³
28
Lithuania
21
Air quality 9.2 µg/m³
29
Guam
18
Air quality 9.6 µg/m³
30
Spain
15
Air quality 9.6 µg/m³
31
Monaco
12
Air quality 9.6 µg/m³
32
France
9
Air quality 9.6 µg/m³
33
Northern Mariana Islands
6
Air quality 9.7 µg/m³
34
United Kingdom
3
Air quality 9.9 µg/m³