SmogRank / History / August 2023

Most polluted cities, August 2023

1,670 cities ranked by their average PM2.5 over the 31 days. A city needs measurements on 70% of the days to be ranked.

#	City	µg/m³
1	Morelia Michoacán, Mexico	99.0
2	Manama Manama, Bahrain	61.0
3	Dhaka low-cost sensors Dhaka Division, Bangladesh	56.9
4	Kamloops British Columbia, Canada	53.9
5	Jakarta Jakarta, Indonesia	49.3
6	Dushanbe Dushanbe, Tajikistan	48.7
7	Medford Oregon, United States	47.2
8	Redmond Oregon, United States	46.6
9	Peshawar low-cost sensors Khyber Pakhtunkhwa, Pakistan	45.9
10	Ashland Oregon, United States	45.6
11	Kigali Kigali, Rwanda	44.9
12	Grants Pass Oregon, United States	44.5
13	Lahore low-cost sensors Punjab, Pakistan	44.4
14	Şabāḩ as Sālim Mubārak al Kabīr, Kuwait	42.6
15	Fort McMurray Alberta, Canada	42.5
16	Vernon British Columbia, Canada	42.2
17	Kelowna British Columbia, Canada	40.6
18	Penticton British Columbia, Canada	40.0
19	Bend Oregon, United States	39.6
20	Kolkata West Bengal, India	39.1
21	Mexicali Baja California, Mexico	37.7
22	Addis Ababa Addis Ababa, Ethiopia	35.8
23	Islamabad low-cost sensors Islamabad, Pakistan	33.9
24	Santa Anita - Los Ficus Lima region, Peru	33.1
25	Delhi Delhi, India	31.3
26	Hanoi Hanoi, Vietnam	31.0
27	Roseburg Oregon, United States	30.0
28	Pristina Pristina, Kosovo	29.5
29	Prince Albert Saskatchewan, Canada	28.3
30	Xonacatlán México, Mexico	28.2
31	Chennai Tamil Nadu, India	27.9
32	Spokane Washington, United States	27.5
33	Sarajevo Federation of B&H, Bosnia and Herzegovina	27.2
34	Lima Lima Province, Peru	26.6
34	Edmonton Alberta, Canada	26.6
36	Moses Lake Washington, United States	26.4
37	Victoria de Durango Durango, Mexico	25.8
38	Badger Alaska, United States	25.2
39	Nairobi Nairobi County, Kenya	25.1
40	Spokane Valley Washington, United States	25.0
41	Walla Walla Washington, United States	24.9
42	Grande Prairie Alberta, Canada	24.6
43	Hyderabad Telangana, India	24.0
44	Bamako Bamako, Mali	23.9
44	Regina Saskatchewan, Canada	23.9
46	Beijing Beijing, China	23.7
46	Cranbrook British Columbia, Canada	23.7
48	Hermiston Oregon, United States	23.6
49	San Francisco Tlalcilalcalpan México, Mexico	23.5
50	Fairbanks Alaska, United States	23.3
51	Fort St. John British Columbia, Canada	23.1
52	Tri-Cities Washington, United States	22.8
53	Guangzhou Guangdong, China	22.7
54	Karachi low-cost sensors Sindh, Pakistan	22.4
54	Toluca México, Mexico	22.4
56	Sunnyside Washington, United States	22.2
57	Baku Baki, Azerbaijan	22.1
57	Shakaskraal low-cost sensors KwaZulu-Natal, South Africa	22.1
59	Altamont Oregon, United States	21.8
60	San Salvador Tizatlalli México, Mexico	21.7
61	Saskatoon Saskatchewan, Canada	21.5
62	Swift Current Saskatchewan, Canada	20.7
63	Pendleton Oregon, United States	20.3
64	Villa Poeta José Gálvez Barrenechea Lima region, Peru	19.7
64	Coeur d'Alene Idaho, United States	19.7
66	Calgary Alberta, Canada	19.4
67	Antananarivo Analamanga, Madagascar	19.3
68	The Dalles Oregon, United States	19.2
69	Shenyang Liaoning, China	18.9
70	Yakima Washington, United States	18.8
71	Jeddah Mecca Region, Saudi Arabia	18.7
71	Santa Catarina Nuevo León, Mexico	18.7
73	Ilinden Ilinden, North Macedonia	18.6
73	Ciudad Juárez Chihuahua, Mexico	18.6
73	Wenatchee Washington, United States	18.6
76	Wan Chai Wan Chai, Hong Kong	18.3
77	São Paulo São Paulo, Brazil	18.2
78	Sliema Tas-Sliema, Malta	18.1
78	Ciudad Benito Juárez Nuevo León, Mexico	18.1
80	Lewiston Idaho, United States	18.0
81	Ellensburg Washington, United States	17.9
81	Pasco Washington, United States	17.9
83	Red Deer Alberta, Canada	17.4
84	Bismarck North Dakota, United States	16.8
85	Salor Tashkent Region, Uzbekistan	16.7
86	Holland Michigan, United States	16.6
87	Ulu Bedok Singapore	16.5
87	Ang Mo Kio New Town Singapore	16.5
89	Chiang Mai low-cost sensors Chiang Mai, Thailand	16.2
89	Great Falls Montana, United States	16.2
89	Chilliwack British Columbia, Canada	16.2
92	Birmingham Alabama, United States	16.1
93	Naples Campania, Italy	16.0
93	Jesi The Marches, Italy	16.0
93	Celaya Guanajuato, Mexico	16.0
96	Prešov Prešov Region, Slovakia	15.8
96	Pullman Washington, United States	15.8
98	Humenné Prešov Region, Slovakia	15.7
99	Naucalpan de Juárez México, Mexico	15.5
99	Chihuahua Chihuahua, Mexico	15.5
101	Calexico California, United States	15.3
102	Asprópyrgos Attica, Greece	15.2
102	Cuernavaca Morelos, Mexico	15.2
102	Monterrey Nuevo León, Mexico	15.2
102	Shreveport Louisiana, United States	15.2
106	Falconara Marittima The Marches, Italy	14.9
107	Takasaki Gunma, Japan	14.8
107	Abuja low-cost sensors FCT, Nigeria	14.8
107	Little Rock Arkansas, United States	14.8
110	Athens Attica, Greece	14.7
110	Tha Bo Nong Khai, Thailand	14.7
110	Nagai Yamagata, Japan	14.7
110	Mosta Il-Mosta, Malta	14.7
110	Moscow Idaho, United States	14.7
115	Tetovo Tetovo, North Macedonia	14.6
115	Burnsville Minnesota, United States	14.6
115	West Fargo North Dakota, United States	14.6
115	St. Albert Alberta, Canada	14.6
119	Collado-Villalba Madrid, Spain	14.5
120	Tepeji del Río de Ocampo Hidalgo, Mexico	14.4
120	Saint Cloud Minnesota, United States	14.4
120	Eugene Oregon, United States	14.4
123	Shakopee Minnesota, United States	14.3
123	Jardines de la Silla Nuevo León, Mexico	14.3
125	Szeged Csongrád, Hungary	14.2
125	Sherwood Park Alberta, Canada	14.2
127	Franklin Park Illinois, United States	14.1
128	Belgrade Central Serbia, Serbia	14.0
128	Tijuana Baja California, Mexico	14.0
130	Acharnés Attica, Greece	13.9
130	Ruse Ruse, Bulgaria	13.9
130	Joliet Illinois, United States	13.9
133	Kathmandu low-cost sensors Bagmati Province, Nepal	13.8
133	Cuenca Castille-La Mancha, Spain	13.8
133	Banja Luka Srpska, Bosnia and Herzegovina	13.8
133	Guadalajara Jalisco, Mexico	13.8
133	Calumet City Illinois, United States	13.8
133	Kalamazoo Michigan, United States	13.8
133	Minneapolis Minnesota, United States	13.8
133	Greater Sudbury Ontario, Canada	13.8
141	Colombo Western Province, Sri Lanka	13.6
141	Żabbar Ħaż-Żabbar, Malta	13.6
141	Alcalá de Henares Madrid, Spain	13.6
141	Prince George British Columbia, Canada	13.6
145	Košice Košice Region, Slovakia	13.5
145	Valdemoro Madrid, Spain	13.5
145	Rochester Minnesota, United States	13.5
145	San Francisco De Borja Lima region, Peru	13.5
149	Vranov nad Topľou Prešov Region, Slovakia	13.4
149	San Andrés Tuxtla Veracruz, Mexico	13.4
149	Indianapolis Indiana, United States	13.4
149	Saint Michael Minnesota, United States	13.4
149	Squamish British Columbia, Canada	13.4
154	Springdale Arkansas, United States	13.3
154	Saint Paul Minnesota, United States	13.3
154	Airdrie Alberta, Canada	13.3
157	Senica Trnava Region, Slovakia	13.2
157	Sulphur Louisiana, United States	13.2
157	Hattiesburg Mississippi, United States	13.2
157	Texarkana Texas, United States	13.2
157	Windsor Ontario, Canada	13.2
162	North Bay Ontario, Canada	13.1
163	Thessaloníki Central Macedonia, Greece	13.0
163	Cadereyta Jiménez Nuevo León, Mexico	13.0
163	Norwood Ohio, United States	13.0
163	Dallas Texas, United States	13.0
167	Trnava Trnava Region, Slovakia	12.9
167	New Orleans Louisiana, United States	12.9
167	Middletown Ohio, United States	12.9
167	Peoria Illinois, United States	12.9
167	Grand Rapids Michigan, United States	12.9
167	Apple Valley Minnesota, United States	12.9
167	Oakville Ontario, Canada	12.9
174	Bangkok low-cost sensors Bangkok, Thailand	12.8
174	Algiers Algiers, Algeria	12.8
174	Český Těšín Moravian-Silesian Region, Czechia	12.8
174	Baytown Texas, United States	12.8
174	East Chicago Indiana, United States	12.8
174	London Ontario, Canada	12.8
180	Ferry Pass Florida, United States	12.7
180	Clinton Iowa, United States	12.7
180	Northbrook Illinois, United States	12.7
180	South Bend Indiana, United States	12.7
180	Cleveland Ohio, United States	12.7
180	West Mifflin Pennsylvania, United States	12.7
186	Hernando Mississippi, United States	12.6
186	Detroit Michigan, United States	12.6
186	Canton Ohio, United States	12.6
186	Watertown South Dakota, United States	12.6
190	Queenstown Estate low-cost sensors Singapore	12.5
190	Mexico City Mexico City, Mexico	12.5
190	Bensalem Pennsylvania, United States	12.5
190	Ukiah California, United States	12.5
194	Jackson Mississippi, United States	12.4
194	Moore Oklahoma, United States	12.4
194	Port Arthur Texas, United States	12.4
194	Des Plaines Illinois, United States	12.4
194	Naperville Illinois, United States	12.4
194	Rockford Illinois, United States	12.4
200	Bratislava Bratislava Region, Slovakia	12.3

Top 200 of 1,670 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