| Rank |
Countries
 |
Amount
 |
Date
|
|
# 1
|
 Sudan: |
270.83 mcg/m³
|
1991  |
|
|
Environment in Sudan
|
|
# 2
|
 United Arab Emirates: |
261.16 mcg/m³
|
1991 |
|
|
Environment in United Arab Emirates
|
|
# 3
|
 Mali: |
257.94 mcg/m³
|
1991 |
|
|
Environment in Mali
|
|
# 4
|
 Uruguay: |
231.16 mcg/m³
|
1991 |
|
|
Environment in Uruguay
|
|
# 5
|
 Liechtenstein: |
224.41 mcg/m³
|
1991 |
|
|
Environment in Liechtenstein
|
|
# 6
|
 Egypt: |
222.54 mcg/m³
|
1991 |
|
|
Environment in Egypt
|
|
# 7
|
 Niger: |
215.63 mcg/m³
|
1991 |
|
|
Environment in Niger
|
|
# 8
|
 Pakistan: |
211.69 mcg/m³
|
1991 |
|
|
Environment in Pakistan
|
|
# 9
|
 Chad: |
204.84 mcg/m³
|
1991 |
|
|
Environment in Chad
|
|
# 10
|
 Bangladesh: |
204.3 mcg/m³
|
1991 |
|
|
Environment in Bangladesh
|
|
# 11
|
 Iraq: |
193.75 mcg/m³
|
1991 |
|
|
Environment in Iraq
|
|
# 12
|
 Kuwait: |
189.78 mcg/m³
|
1991 |
|
|
Environment in Kuwait
|
|
# 13
|
 Oman: |
186.1 mcg/m³
|
1991 |
|
|
Environment in Oman
|
|
# 14
|
 Saudi Arabia: |
177.37 mcg/m³
|
1991 |
|
|
Environment in Saudi Arabia
|
|
# 15
|
 Nigeria: |
177.11 mcg/m³
|
1991 |
|
|
Environment in Nigeria
|
|
# 16
|
 Syria: |
159.97 mcg/m³
|
1991 |
|
|
Environment in Syria
|
|
# 17
|
 Andorra: |
157.6 mcg/m³
|
1991 |
|
|
Environment in Andorra
|
|
# 18
|
 Korea, North: |
156.69 mcg/m³
|
1991 |
|
|
Environment in Korea, North
|
|
# 19
|
 Mauritania: |
145.65 mcg/m³
|
1991 |
|
|
Environment in Mauritania
|
|
# 20
|
 Burkina Faso: |
144.95 mcg/m³
|
1991 |
|
|
Environment in Burkina Faso
|
|
# 21
|
 Trinidad and Tobago: |
139.12 mcg/m³
|
1991 |
|
|
Environment in Trinidad and Tobago
|
|
# 22
|
 Gambia, The: |
137.32 mcg/m³
|
1991 |
|
|
Environment in Gambia, The
|
|
# 23
|
 Indonesia: |
136.21 mcg/m³
|
1991 |
|
|
Environment in Indonesia
|
|
# 24
|
 Angola: |
131.53 mcg/m³
|
1991 |
|
|
Environment in Angola
|
|
# 25
|
 Congo, Republic of the: |
127.7 mcg/m³
|
1991 |
|
|
Environment in Congo, Republic of the
|
|
# 26
|
 Ethiopia: |
127.43 mcg/m³
|
1991 |
|
|
Environment in Ethiopia
|
|
# 27
|
 Libya: |
121.53 mcg/m³
|
1991 |
|
|
Environment in Libya
|
|
# 28
|
 Algeria: |
119.46 mcg/m³
|
1991 |
|
|
Environment in Algeria
|
|
# 29
|
 Bolivia: |
115.63 mcg/m³
|
1991 |
|
|
Environment in Bolivia
|
|
# 30
|
 Burma: |
114.24 mcg/m³
|
1991 |
|
|
Environment in Burma
|
|
# 31
|
 India: |
113.65 mcg/m³
|
1991 |
|
|
Environment in India
|
|
# 32
|
 Guinea-Bissau: |
112.7 mcg/m³
|
1991 |
|
|
Environment in Guinea-Bissau
|
|
# 33
|
 Vietnam: |
112.53 mcg/m³
|
1991 |
|
|
Environment in Vietnam
|
|
# 34
|
 China: |
111.72 mcg/m³
|
1991 |
|
|
Environment in China
|
|
# 35
|
 Cameroon: |
110.52 mcg/m³
|
1991 |
|
|
Environment in Cameroon
|
|
# 36
|
 Botswana: |
110.15 mcg/m³
|
1991 |
|
|
Environment in Botswana
|
|
# 37
|
 Eritrea: |
108.04 mcg/m³
|
1991 |
|
|
Environment in Eritrea
|
|
# 38
|
 Iran: |
107.39 mcg/m³
|
1991 |
|
|
Environment in Iran
|
|
# 39
|
 Bulgaria: |
104.49 mcg/m³
|
1991 |
|
|
Environment in Bulgaria
|
|
# 40
|
 Jordan: |
102.86 mcg/m³
|
1991 |
|
|
Environment in Jordan
|
|
# 41
|
 New Caledonia: |
101.43 mcg/m³
|
1991 |
|
|
Environment in New Caledonia
|
|
# 42
|
 Guinea: |
101.36 mcg/m³
|
1991 |
|
|
Environment in Guinea
|
|
# 43
|
 Mozambique: |
100.86 mcg/m³
|
1991 |
|
|
Environment in Mozambique
|
|
# 44
|
 Singapore: |
100.26 mcg/m³
|
1991 |
|
|
Environment in Singapore
|
|
# 45
|
 Bahrain: |
97.16 mcg/m³
|
1991 |
|
|
Environment in Bahrain
|
|
# 46
|
 Cambodia: |
95.62 mcg/m³
|
1991 |
|
|
Environment in Cambodia
|
|
# 47
|
 Argentina: |
95.47 mcg/m³
|
1991 |
|
|
Environment in Argentina
|
|
# 48
|
 Côte d'Ivoire: |
94.81 mcg/m³
|
1991 |
|
|
Environment in Côte d'Ivoire
|
|
# 49
|
 Paraguay: |
94.59 mcg/m³
|
1991 |
|
|
Environment in Paraguay
|
|
# 50
|
 Peru: |
94.41 mcg/m³
|
1991 |
|
|
Environment in Peru
|
|
# 51
|
 Senegal: |
92.8 mcg/m³
|
1991 |
|
|
Environment in Senegal
|
|
# 52
|
 Zambia: |
87 mcg/m³
|
1991 |
|
|
Environment in Zambia
|
|
# 53
|
 Sri Lanka: |
86.51 mcg/m³
|
1991 |
|
|
Environment in Sri Lanka
|
|
# 54
|
 Sierra Leone: |
85.23 mcg/m³
|
1991 |
|
|
Environment in Sierra Leone
|
|
# 55
|
 Thailand: |
84.19 mcg/m³
|
1991 |
|
|
Environment in Thailand
|
|
# 56
|
 Albania: |
83.13 mcg/m³
|
1991 |
|
|
Environment in Albania
|
|
# 57
|
 Chile: |
82.04 mcg/m³
|
1991 |
|
|
Environment in Chile
|
|
# 58
|
 Cyprus: |
76.05 mcg/m³
|
1991 |
|
|
Environment in Cyprus
|
|
# 59
|
 Afghanistan: |
75.97 mcg/m³
|
1991 |
|
|
Environment in Afghanistan
|
|
# 60
|
 Lesotho: |
75.58 mcg/m³
|
1991 |
|
|
Environment in Lesotho
|
|
# 61
|
 Congo, Democratic Republic of the: |
74.55 mcg/m³
|
1991 |
|
|
Environment in Congo, Democratic Republic of the
|
|
# 62
|
 Qatar: |
72.29 mcg/m³
|
1991 |
|
|
Environment in Qatar
|
|
# 63
|
 Tunisia: |
71.77 mcg/m³
|
1991 |
|
|
Environment in Tunisia
|
|
# 64
|
 Haiti: |
71.67 mcg/m³
|
1991 |
|
|
Environment in Haiti
|
|
# 65
|
 Benin: |
71.53 mcg/m³
|
1991 |
|
|
Environment in Benin
|
|
# 66
|
 Madagascar: |
71.39 mcg/m³
|
1991 |
|
|
Environment in Madagascar
|
|
# 67
|
 Uzbekistan: |
70.34 mcg/m³
|
1991 |
|
|
Environment in Uzbekistan
|
|
# 68
|
 Turkey: |
68.24 mcg/m³
|
1991 |
|
|
Environment in Turkey
|
|
# 69
|
 São Tomé and Príncipe: |
65.94 mcg/m³
|
1991 |
|
|
Environment in São Tomé and Príncipe
|
|
# 70
|
 Israel: |
65.65 mcg/m³
|
1991 |
|
|
Environment in Israel
|
|
# 71
|
 Mexico: |
65.31 mcg/m³
|
1991 |
|
|
Environment in Mexico
|
|
# 72
|
 Czech Republic: |
65.11 mcg/m³
|
1991 |
|
|
Environment in Czech Republic
|
|
# 73
|
 Comoros: |
64.95 mcg/m³
|
1991 |
|
|
Environment in Comoros
|
|
# 74
|
 Malawi: |
64.45 mcg/m³
|
1991 |
|
|
Environment in Malawi
|
|
# 75
|
 Greece: |
64.4 mcg/m³
|
1991 |
|
|
Environment in Greece
|
|
# 76
|
 Nepal: |
64.32 mcg/m³
|
1991 |
|
|
Environment in Nepal
|
|
# 77
|
 Guatemala: |
64.32 mcg/m³
|
1991 |
|
|
Environment in Guatemala
|
|
# 78
|
 Kenya: |
64.27 mcg/m³
|
1991 |
|
|
Environment in Kenya
|
|
# 79
|
 Laos: |
64.21 mcg/m³
|
1991 |
|
|
Environment in Laos
|
|
# 80
|
 Panama: |
62.31 mcg/m³
|
1991 |
|
|
Environment in Panama
|
|
# 81
|
 Central African Republic: |
60.73 mcg/m³
|
1991 |
|
|
Environment in Central African Republic
|
|
# 82
|
 Mongolia: |
60.61 mcg/m³
|
1991 |
|
|
Environment in Mongolia
|
|
# 83
|
 Liberia: |
57.91 mcg/m³
|
1991 |
|
|
Environment in Liberia
|
|
# 84
|
 Somalia: |
57.74 mcg/m³
|
1991 |
|
|
Environment in Somalia
|
|
# 85
|
 Macau: |
56.93 mcg/m³
|
1991 |
|
|
Environment in Macau
|
|
# 86
|
 Korea, South: |
55.73 mcg/m³
|
1991 |
|
|
Environment in Korea, South
|
|
# 87
|
 Jamaica: |
55.71 mcg/m³
|
1991 |
|
|
Environment in Jamaica
|
|
# 88
|
 Guyana: |
55.08 mcg/m³
|
1991 |
|
|
Environment in Guyana
|
|
# 89
|
 Philippines: |
54.12 mcg/m³
|
1991 |
|
|
Environment in Philippines
|
|
# 90
|
 Poland: |
54.04 mcg/m³
|
1991 |
|
|
Environment in Poland
|
|
# 91
|
 Lebanon: |
53.64 mcg/m³
|
1991 |
|
|
Environment in Lebanon
|
|
# 92
|
 Tanzania: |
53.51 mcg/m³
|
1991 |
|
|
Environment in Tanzania
|
|
# 93
|
 Bahamas, The: |
52.69 mcg/m³
|
1991 |
|
|
Environment in Bahamas, The
|
|
# 94
|
 Faroe Islands: |
52.08 mcg/m³
|
1991 |
|
|
Environment in Faroe Islands
|
|
# 95
|
 El Salvador: |
51.46 mcg/m³
|
1991 |
|
|
Environment in El Salvador
|
|
# 96
|
 Suriname: |
51.28 mcg/m³
|
1991 |
|
|
Environment in Suriname
|
|
# 97
|
 Burundi: |
49.29 mcg/m³
|
1991 |
|
|
Environment in Burundi
|
|
# 98
|
 Portugal: |
49.29 mcg/m³
|
1991 |
|
|
Environment in Portugal
|
|
# 99
|
 Croatia: |
48.65 mcg/m³
|
1991 |
|
|
Environment in Croatia
|
|
# 100
|
 Nicaragua: |
48.55 mcg/m³
|
1991 |
|
|
Environment in Nicaragua
|
|
# 101
|
 Saint Lucia: |
48.08 mcg/m³
|
1991 |
|
|
Environment in Saint Lucia
|
|
# 102
|
 Rwanda: |
47.72 mcg/m³
|
1991 |
|
|
Environment in Rwanda
|
|
# 103
|
 Togo: |
47.07 mcg/m³
|
1991 |
|
|
Environment in Togo
|
|
# 104
|
 Barbados: |
46.45 mcg/m³
|
1991 |
|
|
Environment in Barbados
|
|
# 105
|
 Dominican Republic: |
46.06 mcg/m³
|
1991 |
|
|
Environment in Dominican Republic
|
|
# 106
|
 Bhutan: |
45.42 mcg/m³
|
1991 |
|
|
Environment in Bhutan
|
|
# 107
|
 Virgin Islands: |
45.14 mcg/m³
|
1991 |
|
|
Environment in Virgin Islands
|
|
# 108
|
 Netherlands: |
44.72 mcg/m³
|
1991 |
|
|
Environment in Netherlands
|
|
# 109
|
 Djibouti: |
43.63 mcg/m³
|
1991 |
|
|
Environment in Djibouti
|
|
# 110
|
 Honduras: |
43.46 mcg/m³
|
1991 |
|
|
Environment in Honduras
|
|
# 111
|
 Costa Rica: |
42.8 mcg/m³
|
1991 |
|
|
Environment in Costa Rica
|
|
# 112
|
 Slovakia: |
42.07 mcg/m³
|
1991 |
|
|
Environment in Slovakia
|
|
# 113
|
 Namibia: |
41.15 mcg/m³
|
1991 |
|
|
Environment in Namibia
|
|
# 114
|
 Saint Vincent and the Grenadines: |
41.14 mcg/m³
|
1991 |
|
|
Environment in Saint Vincent and the Grenadines
|
|
# 115
|
 Brazil: |
40.74 mcg/m³
|
1991 |
|
|
Environment in Brazil
|
|
# 116
|
 Japan: |
40.55 mcg/m³
|
1991 |
|
|
Environment in Japan
|
|
# 117
|
 Spain: |
40.47 mcg/m³
|
1991 |
|
|
Environment in Spain
|
|
# 118
|
 Ukraine: |
40.33 mcg/m³
|
1991 |
|
|
Environment in Ukraine
|
|
# 119
|
 Cuba: |
38.85 mcg/m³
|
1991 |
|
|
Environment in Cuba
|
|
# 120
|
 Italy: |
38.8 mcg/m³
|
1991 |
|
|
Environment in Italy
|
|
# 121
|
 Solomon Islands: |
38.79 mcg/m³
|
1991 |
|
|
Environment in Solomon Islands
|
|
# 122
|
 Austria: |
38.57 mcg/m³
|
1991 |
|
|
Environment in Austria
|
|
# 123
|
 Zimbabwe: |
38.29 mcg/m³
|
1991 |
|
|
Environment in Zimbabwe
|
|
# 124
|
 Colombia: |
37.88 mcg/m³
|
1991 |
|
|
Environment in Colombia
|
|
# 125
|
 Bosnia and Herzegovina: |
37.15 mcg/m³
|
1991 |
|
|
Environment in Bosnia and Herzegovina
|
|
# 126
|
 Swaziland: |
36.57 mcg/m³
|
1991 |
|
|
Environment in Swaziland
|
|
# 127
|
 Ecuador: |
36.2 mcg/m³
|
1991 |
|
|
Environment in Ecuador
|
|
# 128
|
 Fiji: |
36.19 mcg/m³
|
1991 |
|
|
Environment in Fiji
|
|
# 129
|
 Ghana: |
35.9 mcg/m³
|
1991 |
|
|
Environment in Ghana
|
|
# 130
|
 Switzerland: |
35.76 mcg/m³
|
1991 |
|
|
Environment in Switzerland
|
|
# 131
|
 Malaysia: |
34.94 mcg/m³
|
1991 |
|
|
Environment in Malaysia
|
|
# 132
|
 Latvia: |
34.79 mcg/m³
|
1991 |
|
|
Environment in Latvia
|
|
# 133
|
 Dominica: |
34.09 mcg/m³
|
1991 |
|
|
Environment in Dominica
|
|
# 134
|
 Belgium: |
33.57 mcg/m³
|
1991 |
|
|
Environment in Belgium
|
|
# 135
|
 Netherlands Antilles: |
33.53 mcg/m³
|
1991 |
|
|
Environment in Netherlands Antilles
|
|
# 136
|
 Romania: |
33.2 mcg/m³
|
1991 |
|
|
Environment in Romania
|
|
# 137
|
 Papua New Guinea: |
32.65 mcg/m³
|
1991 |
|
|
Environment in Papua New Guinea
|
|
# 138
|
 Macedonia, Republic of: |
32.56 mcg/m³
|
1991 |
|
|
Environment in Macedonia, Republic of
|
|
# 139
|
 Hungary: |
32.16 mcg/m³
|
1991 |
|
|
Environment in Hungary
|
|
# 140
|
 Morocco: |
31.76 mcg/m³
|
1991 |
|
|
Environment in Morocco
|
|
# 141
|
 Grenada: |
30.75 mcg/m³
|
1991 |
|
|
Environment in Grenada
|
|
# 142
|
 Vanuatu: |
30.71 mcg/m³
|
1991 |
|
|
Environment in Vanuatu
|
|
# 143
|
 South Africa: |
30.36 mcg/m³
|
1991 |
|
|
Environment in South Africa
|
|
# 144
|
 Denmark: |
29.76 mcg/m³
|
1991 |
|
|
Environment in Denmark
|
|
# 145
|
 Luxembourg: |
29.49 mcg/m³
|
1991 |
|
|
Environment in Luxembourg
|
|
# 146
|
 Saint Kitts and Nevis: |
29.03 mcg/m³
|
1991 |
|
|
Environment in Saint Kitts and Nevis
|
|
# 147
|
 United States: |
28.91 mcg/m³
|
1991 |
|
|
Environment in United States
|
|
# 148
|
 Germany: |
27.57 mcg/m³
|
1991 |
|
|
Environment in Germany
|
|
# 149
|
 Uganda: |
26.73 mcg/m³
|
1991 |
|
|
Environment in Uganda
|
|
# 150
|
 Maldives: |
26.35 mcg/m³
|
1991 |
|
|
Environment in Maldives
|
|
# 151
|
 Brunei: |
26.31 mcg/m³
|
1991 |
|
|
Environment in Brunei
|
|
# 152
|
 Lithuania: |
25.86 mcg/m³
|
1991 |
|
|
Environment in Lithuania
|
|
# 153
|
 Puerto Rico: |
25.58 mcg/m³
|
1991 |
|
|
Environment in Puerto Rico
|
|
# 154
|
 Ireland: |
25.17 mcg/m³
|
1991 |
|
|
Environment in Ireland
|
|
# 155
|
 United Kingdom: |
25.07 mcg/m³
|
1991 |
|
|
Environment in United Kingdom
|
|
# 156
|
 Norway: |
24.53 mcg/m³
|
1991 |
|
|
Environment in Norway
|
|
# 157
|
 Serbia and Montenegro: |
24.52 mcg/m³
|
1991 |
|
|
Environment in Serbia and Montenegro
|
|
# 158
|
 Mauritius: |
24.38 mcg/m³
|
1991 |
|
|
Environment in Mauritius
|
|
# 159
|
 Finland: |
23.95 mcg/m³
|
1991 |
|
|
Environment in Finland
|
|
# 160
|
 Canada: |
23.64 mcg/m³
|
1991 |
|
|
Environment in Canada
|
|
# 161
|
 Cayman Islands: |
23.3 mcg/m³
|
1991 |
|
|
Environment in Cayman Islands
|
|
# 162
|
 Belize: |
22.75 mcg/m³
|
1991 |
|
|
Environment in Belize
|
|
# 163
|
 Iceland: |
22.69 mcg/m³
|
1991 |
|
|
Environment in Iceland
|
|
# 164
|
 San Marino: |
22.34 mcg/m³
|
1991 |
|
|
Environment in San Marino
|
|
# 165
|
 Australia: |
21.38 mcg/m³
|
1991 |
|
|
Environment in Australia
|
|
# 166
|
 Antigua and Barbuda: |
19.26 mcg/m³
|
1991 |
|
|
Environment in Antigua and Barbuda
|
|
# 167
|
 France: |
17.58 mcg/m³
|
1991 |
|
|
Environment in France
|
|
# 168
|
 Equatorial Guinea: |
17.53 mcg/m³
|
1991 |
|
|
Environment in Equatorial Guinea
|
|
# 169
|
 Estonia: |
16.31 mcg/m³
|
1991 |
|
|
Environment in Estonia
|
|
# 170
|
 New Zealand: |
16.01 mcg/m³
|
1991 |
|
|
Environment in New Zealand
|
|
# 171
|
 Venezuela: |
14.97 mcg/m³
|
1991 |
|
|
Environment in Venezuela
|
|
# 172
|
 Sweden: |
14.55 mcg/m³
|
1991 |
|
|
Environment in Sweden
|
|
# 173
|
 Russia: |
11.39 mcg/m³
|
1991 |
|
|
Environment in Russia
|
|
# 174
|
 Kazakhstan: |
10.71 mcg/m³
|
1991 |
|
|
Environment in Kazakhstan
|
|
# 175
|
 Gabon: |
9.35 mcg/m³
|
1991 |
|
|
Environment in Gabon
|
|
# 176
|
 Belarus: |
6.47 mcg/m³
|
1991 |
|
|
Environment in Belarus
|
| |
Weighted average: |
73.7 mcg/m³ |
|
|
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