SmogRank / History / week of March 20, 2023

Most polluted cities, week of March 20, 2023

1,198 cities ranked by their average PM2.5 over the 7 days. A city needs measurements on 70% of the days to be ranked.

#	City	µg/m³
1	Reykjavík Capital Region, Iceland	313.9
2	N'Djamena N’Djaména, Chad	94.6
3	Bamako Bamako, Mali	90.0
4	Khartoum Khartoum, Sudan	68.3
5	Lahore low-cost sensors Punjab, Pakistan	63.7
6	Delhi Delhi, India	57.0
7	Cholula Puebla, Mexico	49.5
8	Peshawar low-cost sensors Khyber Pakhtunkhwa, Pakistan	47.3
9	Baghdad Baghdad, Iraq	45.0
10	Alexandria Alexandria, Egypt	44.4
11	San Francisco Tlalcilalcalpan México, Mexico	41.4
12	Abuja low-cost sensors FCT, Nigeria	41.1
13	Dushanbe Dushanbe, Tajikistan	40.8
14	Ciudad Benito Juárez Nuevo León, Mexico	37.9
15	Celaya Guanajuato, Mexico	33.2
16	Chisinau Chișinău Municipality, Moldova	32.9
17	Karachi low-cost sensors Sindh, Pakistan	32.8
18	Salor Tashkent Region, Uzbekistan	32.7
19	Islamabad low-cost sensors Islamabad, Pakistan	32.5
20	San Mateo Atenco México, Mexico	31.9
21	Niš Central Serbia, Serbia	31.7
22	Kathmandu low-cost sensors Bagmati Province, Nepal	31.6
23	San Salvador Tizatlalli México, Mexico	30.2
24	Bishkek low-cost sensors Bishkek, Kyrgyzstan	29.0
25	Toluca México, Mexico	28.9
26	Xonacatlán México, Mexico	28.1
27	Santa Catarina Nuevo León, Mexico	27.2
28	García Nuevo León, Mexico	26.3
29	Athens Attica, Greece	26.1
30	Naucalpan de Juárez México, Mexico	25.8
31	Ciudad Nezahualcoyotl México, Mexico	25.1
32	Ciudad Apodaca Nuevo León, Mexico	24.9
33	Mexico City Mexico City, Mexico	24.3
34	Puebla Puebla, Mexico	24.1
35	Guadalajara Jalisco, Mexico	24.0
36	Lublin Lublin, Poland	23.9
37	Tepeji del Río de Ocampo Hidalgo, Mexico	23.0
38	Jastrzębie Zdrój Silesia, Poland	22.7
39	Monterrey Nuevo León, Mexico	22.3
40	Pachuca de Soto Hidalgo, Mexico	22.1
41	Pristina Pristina, Kosovo	21.6
42	Şabāḩ as Sālim Mubārak al Kabīr, Kuwait	21.4
42	Iaşi Iași County, Romania	21.4
44	Salamanca Guanajuato, Mexico	21.0
45	Thessaloníki Central Macedonia, Greece	20.9
45	Łask Łódź Voivodeship, Poland	20.9
47	Mumbai Maharashtra, India	20.7
47	Albany Georgia, United States	20.7
49	Ciudad Juárez Chihuahua, Mexico	20.2
50	Yerevan low-cost sensors Yerevan, Armenia	19.7
51	Włocławek Kujawsko-Pomorskie, Poland	19.6
52	Belgrade Central Serbia, Serbia	19.4
52	Trento Trentino-Alto Adige, Italy	19.4
52	Alessandria Piedmont, Italy	19.4
55	Otwock Mazovia, Poland	19.3
55	Santiago de Querétaro Querétaro, Mexico	19.3
57	Botevgrad low-cost sensors Sofia, Bulgaria	19.1
57	Kutno Łódź Voivodeship, Poland	19.1
57	Ciudad General Escobedo Nuevo León, Mexico	19.1
57	Lawrenceville Georgia, United States	19.1
61	Conakry Conakry, Guinea	19.0
62	Asprópyrgos Attica, Greece	18.9
62	Bucharest Bucharest, Romania	18.9
62	Antananarivo Analamanga, Madagascar	18.9
62	Racibórz Silesia, Poland	18.9
62	Apizaco Tlaxcala, Mexico	18.9
67	Kraków Lesser Poland, Poland	18.8
67	Cadereyta Jiménez Nuevo León, Mexico	18.8
69	Jeddah Mecca Region, Saudi Arabia	18.7
69	Banja Luka Srpska, Bosnia and Herzegovina	18.7
71	Benevento Campania, Italy	18.6
72	Rzeszów Subcarpathia, Poland	18.4
73	San Luis Potosí San Luis Potosí, Mexico	18.3
73	Birmingham Alabama, United States	18.3
75	Valencia Valencia, Spain	18.2
76	Campinas São Paulo, Brazil	18.1
77	Haskovo low-cost sensors Haskovo, Bulgaria	17.9
77	Nisko Subcarpathia, Poland	17.9
77	Athens Georgia, United States	17.9
80	Santo André São Paulo, Brazil	17.8
81	Tarnów Lesser Poland, Poland	17.7
81	São Paulo São Paulo, Brazil	17.7
83	Trenčín Trenčín Region, Slovakia	17.6
83	Rio Claro São Paulo, Brazil	17.6
83	Jundiaí São Paulo, Brazil	17.6
86	Košice Košice Region, Slovakia	17.4
86	Zgierz Łódź Voivodeship, Poland	17.4
86	León de los Aldama Guanajuato, Mexico	17.4
89	Prešov Prešov Region, Slovakia	17.3
89	Łuków Lublin, Poland	17.3
89	Colombo Western Province, Sri Lanka	17.3
89	Trussville Alabama, United States	17.3
93	Żyrardów Mazovia, Poland	17.1
94	Dimitrovgrad low-cost sensors Haskovo, Bulgaria	17.0
94	Žilina Žilina Region, Slovakia	17.0
96	Limeira São Paulo, Brazil	16.9
96	Phenix City Alabama, United States	16.9
98	Piraeus Attica, Greece	16.8
98	Pułtusk Mazovia, Poland	16.8
98	Ferraz de Vasconcelos São Paulo, Brazil	16.8
101	Lugano Ticino, Switzerland	16.7
101	Veracruz Veracruz, Mexico	16.7
101	Greenville South Carolina, United States	16.7
104	Kazincbarcika Borsod-Abaúj-Zemplén, Hungary	16.6
104	Naples Campania, Italy	16.6
106	Katowice Silesia, Poland	16.5
107	Augustów Podlasie, Poland	16.4
108	Radom Mazovia, Poland	16.3
108	La Orotava Canary Islands, Spain	16.3
108	Martin Žilina Region, Slovakia	16.3
108	Gadsden Alabama, United States	16.3
112	Cluj-Napoca Cluj County, Romania	16.2
112	Rovereto Trentino-Alto Adige, Italy	16.2
112	Modugno Apulia, Italy	16.2
115	Craiova Dolj, Romania	16.0
115	Great Falls Montana, United States	16.0
117	Zamość Lublin, Poland	15.9
117	Gainesville Georgia, United States	15.9
117	Lexington North Carolina, United States	15.9
117	East Ridge Tennessee, United States	15.9
121	Aguascalientes Aguascalientes, Mexico	15.8
122	Krosno Subcarpathia, Poland	15.7
123	Indianapolis Indiana, United States	15.6
124	Wawer Mazovia, Poland	15.4
124	Mielec Subcarpathia, Poland	15.4
124	Łódź Łódź Voivodeship, Poland	15.4
124	Tijuana Baja California, Mexico	15.4
128	Acharnés Attica, Greece	15.3
129	Jarosław Subcarpathia, Poland	15.2
129	Ružomberok Žilina Region, Slovakia	15.2
131	Humenné Prešov Region, Slovakia	15.1
131	Spartanburg South Carolina, United States	15.1
133	Toruń Kujawsko-Pomorskie, Poland	15.0
134	Warsaw Mazovia, Poland	14.9
134	Opole Opole Voivodeship, Poland	14.9
134	Bielsko-Biala Silesia, Poland	14.9
134	Redford Michigan, United States	14.9
138	Płock Mazovia, Poland	14.8
138	Macon Georgia, United States	14.8
140	Burriana Valencia, Spain	14.7
140	Bolzano Trentino-Alto Adige, Italy	14.7
140	Clinton Iowa, United States	14.7
143	Algiers Algiers, Algeria	14.6
143	Ribeirão Preto São Paulo, Brazil	14.6
143	Clemmons North Carolina, United States	14.6
143	Edinburg Texas, United States	14.6
147	Sevlievo low-cost sensors Gabrovo, Bulgaria	14.5
147	Lethbridge Alberta, Canada	14.5
149	San Miguel de Allende Guanajuato, Mexico	14.4
150	Bellinzona Ticino, Switzerland	14.3
150	Senica Trnava Region, Slovakia	14.3
150	Partizánske Trenčín Region, Slovakia	14.3
150	Huntsville Alabama, United States	14.3
150	Hattiesburg Mississippi, United States	14.3
150	Chattanooga Tennessee, United States	14.3
156	Grajewo Podlasie, Poland	14.2
156	Zvolen Banská Bystrica Region, Slovakia	14.2
156	Prievidza Trenčín Region, Slovakia	14.2
156	Banská Bystrica Banská Bystrica Region, Slovakia	14.2
156	Taubaté São Paulo, Brazil	14.2
156	Brownsville Texas, United States	14.2
162	Baytown Texas, United States	14.1
163	Jasło Subcarpathia, Poland	14.0
163	Český Těšín Moravian-Silesian Region, Czechia	14.0
163	Winston-Salem North Carolina, United States	14.0
163	Houston Texas, United States	14.0
167	Briton Ferry Wales, United Kingdom	13.8
168	Ashgabat Ashgabat, Turkmenistan	13.7
168	Vranov nad Topľou Prešov Region, Slovakia	13.7
168	Guaratinguetá São Paulo, Brazil	13.7
168	Pennsauken New Jersey, United States	13.7
172	Kętrzyn Warmia-Masuria, Poland	13.6
173	Khalándrion Attica, Greece	13.5
173	Trnava Trnava Region, Slovakia	13.5
173	Wrocław Lower Silesia, Poland	13.5
173	Kłodzko Lower Silesia, Poland	13.5
173	Warner Robins Georgia, United States	13.5
178	Jelenia Góra Lower Silesia, Poland	13.4
179	Sliema Tas-Sliema, Malta	13.3
179	Lębork Pomerania, Poland	13.3
179	São José dos Campos São Paulo, Brazil	13.3
179	San Andrés Tuxtla Veracruz, Mexico	13.3
179	Irapuato Guanajuato, Mexico	13.3
184	Świecie Kujawsko-Pomorskie, Poland	13.2
184	Hamilton Ontario, Canada	13.2
186	Chihuahua Chihuahua, Mexico	13.0
187	Białystok Podlasie, Poland	12.9
187	Moline Illinois, United States	12.9
189	Zlín Zlín, Czechia	12.8
190	Gdynia Pomerania, Poland	12.7
190	São José do Rio Preto São Paulo, Brazil	12.7
192	Dunaújváros Fejér, Hungary	12.6
192	Ostrava Moravian-Silesian Region, Czechia	12.6
192	Ferry Pass Florida, United States	12.6
195	Olomouc Olomouc Region, Czechia	12.5
195	Pasadena Texas, United States	12.5
195	Calgary Alberta, Canada	12.5
198	Bailén Andalusia, Spain	12.4
198	Charlotte North Carolina, United States	12.4
198	Medicine Hat Alberta, Canada	12.4

Top 200 of 1,198 shown.

Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data