SmogRank / History / week of January 6, 2025

Most polluted cities, week of January 6, 2025

1,821 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	Delhi Delhi, India	194.6
2	Dushanbe Dushanbe, Tajikistan	170.7
3	Novi Pazar Central Serbia, Serbia	118.8
4	Mumbai Maharashtra, India	88.2
5	Chennai Tamil Nadu, India	68.0
6	Valjevo Central Serbia, Serbia	64.9
7	Yerevan low-cost sensors Yerevan, Armenia	60.1
8	Codlea Brașov County, Romania	57.1
9	Niš Central Serbia, Serbia	56.0
10	Bangkok low-cost sensors Bangkok, Thailand	49.6
11	Dej Cluj County, Romania	45.9
12	Accra low-cost sensors Greater Accra, Ghana	43.9
13	Chiang Mai low-cost sensors Chiang Mai, Thailand	43.3
14	Los Angeles California, United States	40.5
15	Tuen Mun Tuen Mun, Hong Kong	38.9
16	Baku Baki, Azerbaijan	37.4
17	Haskovo low-cost sensors Haskovo, Bulgaria	35.1
18	Smederevo Central Serbia, Serbia	34.8
19	Wan Chai Wan Chai, Hong Kong	33.9
19	Tin Shui Wai Yuen Long, Hong Kong	33.9
21	Compton California, United States	33.8
22	Dimitrovgrad low-cost sensors Haskovo, Bulgaria	33.4
23	San Tung Chung Hang Islands, Hong Kong	32.5
24	Obrenovac Central Serbia, Serbia	32.4
25	Cluj-Napoca Cluj County, Romania	32.3
26	Craiova Dolj, Romania	31.7
26	Fengshan Takao, Taiwan	31.7
28	Chaozhou Taiwan, Taiwan	31.2
29	Mong Kok Yau Tsim Mong District, Hong Kong	30.9
30	Tai Po Tai Po, Hong Kong	30.3
31	Bucharest Bucharest, Romania	29.0
31	Kazincbarcika Borsod-Abaúj-Zemplén, Hungary	29.0
31	Kwai Chung Kwai Tsing District, Hong Kong	29.0
34	Jincheng Fukien, Taiwan	28.8
35	Istanbul low-cost sensors Istanbul, Turkey	28.6
36	Kaohsiung Takao, Taiwan	28.5
37	Tsuen Wan Tsuen Wan, Hong Kong	28.0
38	Sham Shui Po Sham Shui Po District, Hong Kong	27.7
39	Addis Ababa Addis Ababa, Ethiopia	27.5
39	Sevlievo low-cost sensors Gabrovo, Bulgaria	27.5
41	Fanling North District, Hong Kong	27.1
42	Zgierz Łódź Voivodeship, Poland	26.8
43	Thessaloníki Central Macedonia, Greece	26.2
43	Lučenec Banská Bystrica Region, Slovakia	26.2
45	Sarajevo Federation of B&H, Bosnia and Herzegovina	26.1
46	Victoria Central and Western, Hong Kong	26.0
47	Sha Tin Sha Tin, Hong Kong	25.4
47	Sau Mau Ping Kwun Tong District, Hong Kong	25.4
49	Augustów Podlasie, Poland	23.7
50	Asprópyrgos Attica, Greece	23.5
51	Otwock Mazovia, Poland	23.3
52	Belgrade Central Serbia, Serbia	23.1
52	Aberdeen Southern District, Hong Kong	23.1
52	Kranj Urban Municipality of Kranj, Slovenia	23.1
55	Hanford California, United States	23.0
56	Fresno California, United States	22.7
57	Long Beach California, United States	22.1
58	Yongkang Taiwan, Taiwan	21.5
59	Douliu Taiwan, Taiwan	21.4
60	London England, United Kingdom	21.0
61	Tainan Taiwan, Taiwan	20.7
62	Acharnés Attica, Greece	20.6
62	Iaşi Iași County, Romania	20.6
62	Murcia Murcia, Spain	20.6
65	Visalia California, United States	20.4
66	Piraeus Attica, Greece	20.3
66	Zvolen Banská Bystrica Region, Slovakia	20.3
68	Erlun Taiwan, Taiwan	20.2
69	Xinying Taiwan, Taiwan	19.9
69	Zhushan Taiwan, Taiwan	19.9
71	Chiayi City Taiwan, Taiwan	19.4
72	Miskolc Borsod-Abaúj-Zemplén, Hungary	19.2
72	Ecatepec de Morelos México, Mexico	19.2
72	Silao de la Victoria Guanajuato, Mexico	19.2
75	Molina de Segura Murcia, Spain	19.1
76	Gorizia Friuli Venezia Giulia, Italy	18.9
76	León de los Aldama Guanajuato, Mexico	18.9
76	Bakersfield California, United States	18.9
79	Ciudad Nezahualcoyotl México, Mexico	18.7
80	Košice Košice Region, Slovakia	18.6
80	Manlleu Catalonia, Spain	18.6
82	Izegem Flanders, Belgium	18.5
82	Badger Alaska, United States	18.5
84	Corcoran California, United States	18.4
85	Novi Sad Vojvodina, Serbia	18.3
86	Menen Flanders, Belgium	18.2
87	Burbank California, United States	18.0
88	Cork Munster, Ireland	17.8
88	San Luis de la Paz Guanajuato, Mexico	17.8
90	Le Havre Normandy, France	17.7
91	Gabrovo low-cost sensors Gabrovo, Bulgaria	17.6
91	Púchov Trenčín Region, Slovakia	17.6
93	Bexley England, United Kingdom	17.5
94	Beigang Taiwan, Taiwan	17.4
95	Dagenham England, United Kingdom	17.3
96	Irapuato Guanajuato, Mexico	17.1
97	Pylaía Central Macedonia, Greece	17.0
97	Ružomberok Žilina Region, Slovakia	17.0
97	Clovis California, United States	17.0
100	Kortrijk Flanders, Belgium	16.9
101	Taibao Taiwan, Taiwan	16.7
102	Erlin Taiwan, Taiwan	16.6
102	Santa Monica low-cost sensors California, United States	16.6
104	Banská Bystrica Banská Bystrica Region, Slovakia	16.5
105	Kraków Lesser Poland, Poland	16.4
106	Nantou Taiwan, Taiwan	16.3
107	Yuanlin Taiwan, Taiwan	16.2
108	Neili Taiwan, Taiwan	16.0
108	Magong Taiwan, Taiwan	16.0
110	Wawer Mazovia, Poland	15.9
110	Waterford Munster, Ireland	15.9
112	Porterville California, United States	15.8
113	Carlow Leinster, Ireland	15.5
114	Pruszków Mazovia, Poland	15.4
114	Kielce Świętokrzyskie, Poland	15.4
114	Merced California, United States	15.4
117	Puli Taiwan, Taiwan	15.3
117	Porsgrunn Telemark, Norway	15.3
119	Rixensart Wallonia, Belgium	15.2
119	Włocławek Kujawsko-Pomorskie, Poland	15.2
119	Phoenix Arizona, United States	15.2
122	Traun Upper Austria, Austria	15.0
122	Celje Urban Municipality of Celje, Slovenia	15.0
124	Radom Mazovia, Poland	14.9
124	Konstancin-Jeziorna Mazovia, Poland	14.9
124	Mexico City Mexico City, Mexico	14.9
127	Douai Hauts-de-France, France	14.8
128	Buzi Taiwan, Taiwan	14.7
128	Jastrzębie Zdrój Silesia, Poland	14.7
128	New Albany Indiana, United States	14.7
131	Lublin Lublin, Poland	14.6
131	Indianapolis Indiana, United States	14.6
131	Madera California, United States	14.6
134	Vilnius Vilnius, Lithuania	14.5
134	Botevgrad low-cost sensors Sofia, Bulgaria	14.5
134	Evansville Indiana, United States	14.5
137	Augusta Georgia, United States	14.4
138	Dartford England, United Kingdom	14.3
138	Wolfsberg Carinthia, Austria	14.3
138	Lochristi Flanders, Belgium	14.3
138	Prievidza Trenčín Region, Slovakia	14.3
138	Tijuana Baja California, Mexico	14.3
138	West Memphis Arkansas, United States	14.3
144	Olsztyn Warmia-Masuria, Poland	14.2
144	Toufen Taiwan, Taiwan	14.2
144	Dublin Leinster, Ireland	14.2
147	Białystok Podlasie, Poland	14.1
147	Xizhi Taipei, Taiwan	14.1
147	Grimbergen Flanders, Belgium	14.1
147	Redford Michigan, United States	14.1
147	Gahanna Ohio, United States	14.1
152	Warsaw Mazovia, Poland	14.0
152	Changhua Taiwan, Taiwan	14.0
152	Boulogne-sur-Mer Hauts-de-France, France	14.0
155	Legionowo Mazovia, Poland	13.9
155	Zaventem Flanders, Belgium	13.9
155	Roeselare Flanders, Belgium	13.9
155	Gent Flanders, Belgium	13.9
155	Middletown Ohio, United States	13.9
155	Dublin Ohio, United States	13.9
161	Daxi Taiwan, Taiwan	13.8
161	Linz Upper Austria, Austria	13.8
161	Tucson Arizona, United States	13.8
164	Kaunas Kaunas, Lithuania	13.7
164	Pezinok Bratislava Region, Slovakia	13.7
164	Jasper Indiana, United States	13.7
164	Marana Arizona, United States	13.7
164	Stockton California, United States	13.7
169	Prešov Prešov Region, Slovakia	13.6
169	Taichung Taiwan, Taiwan	13.6
169	Žiar nad Hronom Banská Bystrica Region, Slovakia	13.6
172	Szeged Csongrád, Hungary	13.5
172	Taipei Taiwan, Taiwan	13.5
172	Beveren Flanders, Belgium	13.5
172	Kristiansand Agder, Norway	13.5
172	Salamanca Guanajuato, Mexico	13.5
172	Jeffersontown Kentucky, United States	13.5
172	Glendora California, United States	13.5
179	Hsinchu Taiwan, Taiwan	13.4
179	Xizhou Taiwan, Taiwan	13.4
181	Pécs Baranya, Hungary	13.3
181	Žilina Žilina Region, Slovakia	13.3
181	Louisville Kentucky, United States	13.3
181	Valley Station Kentucky, United States	13.3
185	Antwerp Flanders, Belgium	13.2
185	Oregon Ohio, United States	13.2
187	Miaoli Taiwan, Taiwan	13.1
187	Datteln North Rhine-Westphalia, Germany	13.1
187	Elbląg Warmia-Masuria, Poland	13.1
187	Jeffersonville Indiana, United States	13.1
187	Modesto California, United States	13.1
187	Edmonton Alberta, Canada	13.1
187	Sorel-Tracy Quebec, Canada	13.1
194	Zhubei Taiwan, Taiwan	13.0
194	Ansfelden Upper Austria, Austria	13.0
194	Koper Urban Municipality of Koper, Slovenia	13.0
194	Norwood Ohio, United States	13.0
194	Westerville Ohio, United States	13.0
194	Turlock California, United States	13.0
200	Żyrardów Mazovia, Poland	12.9

Top 200 of 1,821 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