SmogRank / History / January 2026

Most polluted cities, January 2026

1,961 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	Faisalabad low-cost sensors Punjab, Pakistan	223.0
2	Peshawar low-cost sensors Khyber Pakhtunkhwa, Pakistan	181.3
3	Lahore low-cost sensors Punjab, Pakistan	180.0
4	Multan low-cost sensors Punjab, Pakistan	179.6
5	Delhi Delhi, India	176.9
6	Bahawalpur low-cost sensors Punjab, Pakistan	174.4
7	Gujranwala low-cost sensors Punjab, Pakistan	171.1
8	Sialkot low-cost sensors Punjab, Pakistan	167.6
9	Rawalpindi low-cost sensors Punjab, Pakistan	130.6
10	Hyderabad low-cost sensors Sindh, Pakistan	116.5
11	Pljevlja Pljevlja, Montenegro	100.2
12	Târgu Mureş low-cost sensors Mureș County, Romania	97.7
13	Dushanbe Dushanbe, Tajikistan	96.8
14	Kathmandu low-cost sensors Bagmati Province, Nepal	96.0
15	Islamabad low-cost sensors Islamabad, Pakistan	93.3
16	Otegen Batyra low-cost sensors Almaty Region, Kazakhstan	88.6
17	Burunday low-cost sensors Almaty Region, Kazakhstan	84.7
18	Srinagar Jammu and Kashmir, India	84.2
19	Sighetu Marmaţiei Maramureş, Romania	84.1
20	Talghar low-cost sensors Almaty Region, Kazakhstan	83.9
21	Yerevan low-cost sensors Yerevan, Armenia	83.4
22	Bijelo Polje Bijelo Polje, Montenegro	83.3
23	Dej Cluj County, Romania	82.3
24	Sarajevo Federation of B&H, Bosnia and Herzegovina	80.6
25	Karachi low-cost sensors Sindh, Pakistan	77.5
26	Kampala low-cost sensors Central Region, Uganda	76.6
27	Târgu Jiu Gorj County, Romania	69.3
28	Żywiec Silesia, Poland	68.6
29	Banja Luka Srpska, Bosnia and Herzegovina	68.4
30	Almaty low-cost sensors Almaty, Kazakhstan	68.0
31	Strumica Strumica, North Macedonia	62.1
32	Vientiane low-cost sensors Vientiane Prefecture, Laos	59.8
33	Khlong Luang low-cost sensors Pathum Thani, Thailand	57.0
34	Gostivar Gostivar, North Macedonia	56.7
35	Baia Mare Maramureş, Romania	53.5
36	Debrecen low-cost sensors Hajdú-Bihar, Hungary	52.7
37	Kumanovo Kumanovo, North Macedonia	52.0
38	Gevgelija Gevgelija, North Macedonia	51.7
39	Zagreb low-cost sensors Zagreb, Croatia	51.6
40	Otwock Mazovia, Poland	51.2
40	Lagos low-cost sensors Lagos, Nigeria	51.2
42	Changchun low-cost sensors Jilin, China	50.4
43	Phuntsholing low-cost sensors Chukha, Bhutan	50.3
44	Kavadarci Kavadarci, North Macedonia	50.1
45	Czechowice-Dziedzice Silesia, Poland	49.9
46	Kłodzko Lower Silesia, Poland	49.6
47	Quetta low-cost sensors Balochistan, Pakistan	49.4
48	Sai Mai low-cost sensors Bangkok, Thailand	48.9
49	Bitola Bitola, North Macedonia	48.8
50	Veles Veles, North Macedonia	48.6
51	Kraków Lesser Poland, Poland	48.5
52	Gorzów Wielkopolski Lubusz, Poland	48.3
53	Kazincbarcika Borsod-Abaúj-Zemplén, Hungary	48.1
54	Tarnów Lesser Poland, Poland	46.4
55	Radomsko Łódź Voivodeship, Poland	45.3
55	Tlaquepaque Jalisco, Mexico	45.3
57	Rzeszów Subcarpathia, Poland	44.5
58	Chrang Chamreh Muoy low-cost sensors Phnom Penh, Cambodia	44.1
59	Kalisz Greater Poland, Poland	43.7
60	Stodůlky low-cost sensors Prague, Czechia	43.6
61	Miskolc Borsod-Abaúj-Zemplén, Hungary	43.5
62	Bangkok low-cost sensors Bangkok, Thailand	43.1
63	Włocławek Kujawsko-Pomorskie, Poland	42.9
64	Jastrzębie Zdrój Silesia, Poland	42.8
65	Tema low-cost sensors Greater Accra, Ghana	42.4
66	Dębica Subcarpathia, Poland	41.9
67	Zgierz Łódź Voivodeship, Poland	41.5
68	Ashaiman low-cost sensors Greater Accra, Ghana	41.4
69	Ilinden Ilinden, North Macedonia	41.1
70	Łask Łódź Voivodeship, Poland	40.9
71	Przemyśl Subcarpathia, Poland	40.6
72	Hacienda Santa Fe Jalisco, Mexico	40.4
73	Cluj-Napoca Cluj County, Romania	39.8
74	Starachowice Świętokrzyskie, Poland	39.1
75	Ciechanów Mazovia, Poland	39.0
76	Nisko Subcarpathia, Poland	38.9
76	Legionowo Mazovia, Poland	38.9
76	Opole Opole Voivodeship, Poland	38.9
79	Craiova Dolj, Romania	38.2
80	Zamość Lublin, Poland	38.1
81	Lublin Lublin, Poland	38.0
82	Żary Lubusz, Poland	37.9
83	Poznań Greater Poland, Poland	37.8
84	Murree low-cost sensors Punjab, Pakistan	37.6
85	Říčany low-cost sensors Central Bohemia, Czechia	37.3
86	Prilep Prilep, North Macedonia	37.1
87	Jarosław Subcarpathia, Poland	37.0
88	Toruń Kujawsko-Pomorskie, Poland	36.9
89	Codlea Brașov County, Romania	35.7
90	Pruszków Mazovia, Poland	35.5
91	Sukuta low-cost sensors Western, Gambia	35.0
92	Konstancin-Jeziorna Mazovia, Poland	34.9
92	Wrocław Lower Silesia, Poland	34.9
94	Mielec Subcarpathia, Poland	34.8
95	Zielona Góra Lubusz, Poland	34.3
96	Guadalajara Jalisco, Mexico	34.1
97	Skopje Grad Skopje, North Macedonia	33.9
98	Nikšić Opština Nikšić, Montenegro	33.8
99	Warsaw Mazovia, Poland	33.7
100	Győr Győr-Moson-Sopron, Hungary	33.5
100	Ptuj Urban Municipality of Ptuj, Slovenia	33.5
102	Radom Mazovia, Poland	33.3
102	Chiang Mai low-cost sensors Chiang Mai, Thailand	33.3
102	Medina Estates low-cost sensors Greater Accra, Ghana	33.3
105	Augustów Podlasie, Poland	33.2
106	Bydgoszcz Kujawsko-Pomorskie, Poland	33.1
107	Dubai low-cost sensors Dubai, United Arab Emirates	32.9
107	Suceava Suceava, Romania	32.9
109	Racibórz Silesia, Poland	32.7
109	Łódź Łódź Voivodeship, Poland	32.7
111	Delano low-cost sensors California, United States	32.6
112	Tuen Mun Tuen Mun, Hong Kong	32.4
113	Gdańsk Pomerania, Poland	32.3
114	Tulare low-cost sensors California, United States	32.0
115	Suwałki Podlasie, Poland	31.9
116	Ełk Warmia-Masuria, Poland	31.4
116	Graz Styria, Austria	31.4
118	Ziguinchor low-cost sensors Ziguinchor, Senegal	31.3
119	Esztergom Komárom-Esztergom, Hungary	31.2
119	Kędzierzyn-Koźle Opole Voivodeship, Poland	31.2
121	Płock Mazovia, Poland	31.1
122	Białystok Podlasie, Poland	31.0
123	Wan Chai Wan Chai, Hong Kong	30.9
123	Katowice Silesia, Poland	30.9
125	Zalău Sălaj County, Romania	30.7
125	Accra low-cost sensors Greater Accra, Ghana	30.7
127	Nyíregyháza Szabolcs-Szatmár-Bereg, Hungary	30.5
128	Brzeg Opole Voivodeship, Poland	29.8
129	Olsztyn Warmia-Masuria, Poland	29.7
130	Kościerzyna Pomerania, Poland	29.5
131	Tin Shui Wai Yuen Long, Hong Kong	29.0
131	Elbląg Warmia-Masuria, Poland	29.0
133	Voluntari Ilfov, Romania	28.7
133	Calafat Dolj, Romania	28.7
135	Haarlem low-cost sensors North Holland, The Netherlands	28.6
136	Jelenia Góra Lower Silesia, Poland	28.5
136	San Luis Potosí San Luis Potosí, Mexico	28.5
138	Fanling North District, Hong Kong	28.4
139	Zacatepec de Hidalgo Morelos, Mexico	28.3
140	Buftea Ilfov, Romania	28.1
140	Gyál Pest County, Hungary	28.1
142	Szczecin West Pomerania, Poland	27.9
143	Ohrid Ohrid, North Macedonia	27.8
144	Kielce Świętokrzyskie, Poland	27.5
145	Budapest Budapest, Hungary	27.4
146	Bernburg Saxony-Anhalt, Germany	27.3
147	San Tung Chung Hang Islands, Hong Kong	27.2
147	Mexicali Baja California, Mexico	27.2
149	Wolfsberg Carinthia, Austria	27.0
150	Pécs Baranya, Hungary	26.9
151	Istanbul low-cost sensors Istanbul, Turkey	26.8
151	Novo Mesto Urban Municipality of Novo Mesto, Slovenia	26.8
153	Iaşi Iași County, Romania	26.7
154	Piatra Neamţ Neamț County, Romania	26.6
154	Eisenzicken Burgenland, Austria	26.6
156	Fengshan Takao, Taiwan	26.3
156	Eisenhüttenstadt Brandenburg, Germany	26.3
158	Wawer Mazovia, Poland	26.2
158	Mexico City Mexico City, Mexico	26.2
160	Halle (Saale) Saxony-Anhalt, Germany	26.1
161	Rēzekne Rēzekne, Latvia	25.9
162	Tai Po Tai Po, Hong Kong	25.6
162	Sham Shui Po Sham Shui Po District, Hong Kong	25.6
164	Popeşti-Leordeni Ilfov, Romania	25.5
164	Maribor Urban Municipality of Maribor, Slovenia	25.5
166	Kaohsiung Takao, Taiwan	25.4
167	Victoria Central and Western, Hong Kong	25.3
168	Passau Bavaria, Germany	25.2
169	Chaozhou Taiwan, Taiwan	25.0
169	Veszprém Veszprém, Hungary	25.0
171	Kochani Kochani, North Macedonia	24.9
171	Bad Kreuznach Rheinland-Pfalz, Germany	24.9
173	Timişoara Timiș County, Romania	24.8
173	Douliu Taiwan, Taiwan	24.8
173	Mong Kok Yau Tsim Mong District, Hong Kong	24.8
173	Oranienburg Brandenburg, Germany	24.8
173	Berlin State of Berlin, Germany	24.8
173	Celje Urban Municipality of Celje, Slovenia	24.8
179	Volos Thessaly, Greece	24.7
179	Speyer Rheinland-Pfalz, Germany	24.7
179	Schwedt (Oder) Brandenburg, Germany	24.7
179	Wittenberg Saxony-Anhalt, Germany	24.7
183	Mühlhausen Thuringia, Germany	24.6
183	Silao de la Victoria Guanajuato, Mexico	24.6
185	Zeitz Saxony-Anhalt, Germany	24.5
186	Teltow Brandenburg, Germany	24.4
186	Merseburg Saxony-Anhalt, Germany	24.4
188	Jincheng Fukien, Taiwan	24.2
188	Neubrandenburg Mecklenburg-Vorpommern, Germany	24.2
190	Lilongwe low-cost sensors Central Region, Malawi	24.1
190	Yongkang Taiwan, Taiwan	24.1
190	Klagenfurt am Wörthersee Carinthia, Austria	24.1
190	Elk Grove low-cost sensors California, United States	24.1
194	Stendal Saxony-Anhalt, Germany	24.0
194	Bitterfeld-Wolfen Saxony-Anhalt, Germany	24.0
194	Naucalpan de Juárez México, Mexico	24.0
197	Worms Rheinland-Pfalz, Germany	23.9
197	Weißenfels Saxony-Anhalt, Germany	23.9
197	Puebla Puebla, Mexico	23.9
200	Kwai Chung Kwai Tsing District, Hong Kong	23.8

Top 200 of 1,961 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