The world's most polluted cities, ranked
227 of 2,311 measured cities in 84 countries breathed air above the WHO 24-hour guideline of 15 µg/m³ over the last 30 days. The worst was Kinshasa, Democratic Republic of the Congo, at 78.2.
#14 Faisalabad 55.6 µg/m³, more polluted than 99% of 2,311
← Kinshasa 78.2
WHO 24-hour guideline
Every ranked city, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
Rank City Last 30 days, daily US AQI
1 Kinshasa low-cost sensors Kinshasa, Democratic Republic of the Congo
167 2 Gujranwala low-cost sensors Punjab, Pakistan
161 3 Dera Māndi Delhi, India
161 4 Blantyre low-cost sensors Southern Region, Malawi
159 5 Jīnd Haryana, India
158 6 Lilongwe low-cost sensors Central Region, Malawi
156 7 Peshawar low-cost sensors Khyber Pakhtunkhwa, Pakistan
156 8 Gurugram Haryana, India
156 9 Lahore low-cost sensors Punjab, Pakistan
155 10 Yamuna Nagar Haryana, India
154 11 Zomba low-cost sensors Southern Region, Malawi
153 12 Kampala low-cost sensors Central Region, Uganda
152 13 Multan low-cost sensors Punjab, Pakistan
151 14 Faisalabad low-cost sensors Punjab, Pakistan
151 15 Jammu low-cost sensors Jammu and Kashmir, India
149 16 Noida Uttar Pradesh, India
143 17 Kaithal Haryana, India
140 18 Sialkot low-cost sensors Punjab, Pakistan
139 19 Bhiwadi Rajasthan, India
139 20 Dhaka low-cost sensors Dhaka Division, Bangladesh
138 21 Singapore low-cost sensors Singapore
134 22 Dādri Uttar Pradesh, India
134 23 Dhāruhera Haryana, India
133 24 Rahim Yar Khan low-cost sensors Punjab, Pakistan
130 25 Saint-Louis low-cost sensors Saint-Louis, Senegal
127 26 Dubai low-cost sensors Dubai, United Arab Emirates
126 27 Queenstown Estate low-cost sensors Singapore
126 28 Jalandhar Punjab, India
125 29 Bahadurgarh Haryana, India
119 30 Faridabad Haryana, India
117 30 Chittoor Andhra Pradesh, India
117 32 Rawalpindi low-cost sensors Punjab, Pakistan
116 33 Bahawalpur low-cost sensors Punjab, Pakistan
116 34 Karonga low-cost sensors Northern Region, Malawi
114 35 Hāpur Uttar Pradesh, India
113 36 Tabanan low-cost sensors Bali, Indonesia
113 36 Baddi Himachal Pradesh, India
113 38 Dushanbe Dushanbe, Tajikistan
112 39 Alipur low-cost sensors Islamabad, Pakistan
112 40 Harare low-cost sensors Harare, Zimbabwe
111 41 Ambāla Haryana, India
111 42 Anantapur Andhra Pradesh, India
110 43 Delhi Delhi, India
108 44 Thānesar Haryana, India
108 45 Sri Ganganagar Rajasthan, India
107 46 Sonīpat Haryana, India
107 46 Muzaffarnagar Uttar Pradesh, India
107 48 Narela Delhi, India
106 49 Islamabad low-cost sensors Islamabad, Pakistan
106 50 Greater Noida Uttar Pradesh, India
105
All 2,311 cities
Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+ . About the scales
Who led, day by day Kinshasa 5 days #1 2026-09-02: 70.1 µg/m³, #6 2026-09-03: 43.2 µg/m³ 2026-09-04: 73.1 µg/m³, #4 2026-09-05: 51.9 µg/m³ 2026-09-06: 78.5 µg/m³, #5 2026-09-07: 111.2 µg/m³, #1 2026-09-08: 138.0 µg/m³, #1 2026-09-09: 58.3 µg/m³ 2026-09-10: 70.7 µg/m³, #5 2026-09-11: 83.0 µg/m³, #1 2026-09-12: 70.9 µg/m³, #3 2026-09-14: 86.5 µg/m³, #3 2026-09-15: 102.1 µg/m³, #3 2026-09-16: 51.1 µg/m³ 2026-09-17: 56.0 µg/m³, #9 2026-09-18: 72.4 µg/m³, #1 2026-09-19: 71.9 µg/m³ 2026-09-20: 73.4 µg/m³ 2026-09-21: 71.2 µg/m³ 2026-09-23: 113.0 µg/m³, #2 2026-09-24: 151.0 µg/m³, #1 2026-09-25: 114.0 µg/m³, #2 2026-09-26: 65.6 µg/m³, #10 2026-09-27: 50.1 µg/m³ 2026-09-28: 58.2 µg/m³ 2026-09-30: 75.5 µg/m³, #4 2026-10-01: 49.9 µg/m³, #9 Gurugram 4 days #1 2026-09-02: 48.7 µg/m³ 2026-09-03: 46.3 µg/m³ 2026-09-04: 30.4 µg/m³ 2026-09-05: 28.9 µg/m³ 2026-09-06: 33.2 µg/m³ 2026-09-07: 45.1 µg/m³ 2026-09-08: 28.8 µg/m³ 2026-09-09: 49.7 µg/m³ 2026-09-10: 57.7 µg/m³ 2026-09-11: 39.0 µg/m³ 2026-09-12: 19.6 µg/m³ 2026-09-13: 24.3 µg/m³ 2026-09-14: 23.9 µg/m³ 2026-09-15: 32.6 µg/m³ 2026-09-16: 21.8 µg/m³ 2026-09-17: 31.4 µg/m³ 2026-09-18: 34.4 µg/m³ 2026-09-19: 181.0 µg/m³, #1 2026-09-20: 212.0 µg/m³, #1 2026-09-21: 144.0 µg/m³, #2 2026-09-22: 51.2 µg/m³ 2026-09-24: 67.3 µg/m³ 2026-09-25: 61.5 µg/m³ 2026-09-26: 86.4 µg/m³, #4 2026-09-27: 109.0 µg/m³, #1 2026-09-28: 104.0 µg/m³, #1 Saint-Louis 3 days #1 2026-09-02: 7.0 µg/m³ 2026-09-03: 5.7 µg/m³ 2026-09-04: 7.2 µg/m³ 2026-09-05: 24.9 µg/m³ 2026-09-06: 17.2 µg/m³ 2026-09-07: 7.4 µg/m³ 2026-09-08: 8.7 µg/m³ 2026-09-09: 145.0 µg/m³, #1 2026-09-12: 12.7 µg/m³ 2026-09-13: 38.3 µg/m³ 2026-09-14: 25.0 µg/m³ 2026-09-17: 231.9 µg/m³, #1 2026-09-18: 53.9 µg/m³, #9 2026-09-19: 26.6 µg/m³ 2026-09-20: 12.3 µg/m³ 2026-09-21: 309.7 µg/m³, #1 2026-09-22: 43.8 µg/m³ 2026-09-23: 51.0 µg/m³ 2026-09-24: 5.1 µg/m³ 2026-09-25: 6.4 µg/m³ 2026-09-26: 24.7 µg/m³ 2026-09-27: 7.3 µg/m³ 2026-09-28: 42.3 µg/m³ 2026-09-29: 8.2 µg/m³ 2026-09-30: 30.3 µg/m³ Dera Māndi 2 days #1 2026-09-02: 69.2 µg/m³, #7 2026-09-03: 88.8 µg/m³, #3 2026-09-04: 76.4 µg/m³, #1 2026-09-05: 68.1 µg/m³, #8 2026-09-06: 42.4 µg/m³ 2026-09-07: 35.9 µg/m³ 2026-09-08: 40.2 µg/m³ 2026-09-09: 55.9 µg/m³ 2026-09-10: 45.4 µg/m³ 2026-09-11: 42.8 µg/m³ 2026-09-12: 45.1 µg/m³ 2026-09-13: 47.5 µg/m³ 2026-09-14: 53.9 µg/m³ 2026-09-15: 70.8 µg/m³, #7 2026-09-16: 57.7 µg/m³, #10 2026-09-17: 74.3 µg/m³, #3 2026-09-18: 54.5 µg/m³, #8 2026-09-19: 85.1 µg/m³, #4 2026-09-20: 147.0 µg/m³, #2 2026-09-21: 102.0 µg/m³, #6 2026-09-22: 94.9 µg/m³, #5 2026-09-23: 90.5 µg/m³, #8 2026-09-24: 122.0 µg/m³, #2 2026-09-25: 158.0 µg/m³, #1 2026-09-26: 40.0 µg/m³ 2026-09-27: 44.0 µg/m³ 2026-09-28: 47.8 µg/m³ 2026-09-29: 53.4 µg/m³ Blantyre 2 days #1 2026-09-02: 105.0 µg/m³, #2 2026-09-03: 80.8 µg/m³, #5 2026-09-04: 64.4 µg/m³, #8 2026-09-05: 91.5 µg/m³, #2 2026-09-06: 119.0 µg/m³, #2 2026-09-07: 69.0 µg/m³, #5 2026-09-08: 27.9 µg/m³ 2026-09-09: 19.6 µg/m³ 2026-09-10: 34.0 µg/m³ 2026-09-11: 54.1 µg/m³ 2026-09-12: 91.4 µg/m³, #2 2026-09-13: 121.0 µg/m³, #1 2026-09-14: 116.0 µg/m³, #1 2026-09-15: 116.0 µg/m³, #2 2026-09-16: 75.3 µg/m³, #4 2026-09-17: 38.7 µg/m³ 2026-09-18: 53.8 µg/m³, #10 2026-09-19: 90.0 µg/m³, #2 2026-09-20: 61.0 µg/m³ 2026-09-21: 58.7 µg/m³ 2026-09-22: 75.0 µg/m³ 2026-09-23: 47.2 µg/m³ 2026-09-24: 70.1 µg/m³ 2026-09-25: 43.2 µg/m³ 2026-09-26: 64.2 µg/m³ 2026-09-27: 49.1 µg/m³ 2026-09-28: 60.5 µg/m³, #8 2026-09-29: 63.9 µg/m³, #7 2026-09-30: 29.6 µg/m³ 2026-10-01: 12.3 µg/m³ Gujranwala 2 days #1 2026-09-02: 48.3 µg/m³ 2026-09-03: 50.9 µg/m³ 2026-09-04: 45.9 µg/m³ 2026-09-05: 63.5 µg/m³, #10 2026-09-06: 51.0 µg/m³ 2026-09-07: 69.1 µg/m³, #4 2026-09-08: 80.0 µg/m³, #2 2026-09-09: 65.9 µg/m³, #8 2026-09-10: 49.4 µg/m³ 2026-09-11: 58.0 µg/m³, #6 2026-09-12: 59.6 µg/m³, #6 2026-09-13: 77.4 µg/m³, #2 2026-09-14: 46.7 µg/m³ 2026-09-15: 45.1 µg/m³ 2026-09-16: 55.2 µg/m³ 2026-09-17: 34.1 µg/m³ 2026-09-18: 46.2 µg/m³ 2026-09-19: 89.2 µg/m³, #3 2026-09-20: 87.6 µg/m³, #5 2026-09-21: 130.0 µg/m³, #3 2026-09-22: 108.5 µg/m³, #1 2026-09-23: 104.0 µg/m³, #3 2026-09-24: 96.4 µg/m³, #5 2026-09-25: 83.0 µg/m³, #6 2026-09-26: 67.8 µg/m³, #9 2026-09-27: 105.5 µg/m³, #2 2026-09-28: 53.9 µg/m³ 2026-09-29: 52.5 µg/m³ 2026-09-30: 81.0 µg/m³, #3 2026-10-01: 104.0 µg/m³, #1 Lilongwe 1 day #1 2026-09-02: 116.0 µg/m³, #1 2026-09-03: 100.0 µg/m³, #2 2026-09-04: 74.8 µg/m³, #3 2026-09-05: 68.6 µg/m³, #7 2026-09-06: 65.6 µg/m³, #8 2026-09-07: 73.3 µg/m³, #3 2026-09-08: 46.4 µg/m³ 2026-09-09: 25.8 µg/m³ 2026-09-10: 37.6 µg/m³ 2026-09-11: 47.4 µg/m³ 2026-09-12: 59.8 µg/m³, #5 2026-09-13: 58.5 µg/m³, #10 2026-09-14: 72.1 µg/m³, #6 2026-09-15: 95.2 µg/m³, #4 2026-09-16: 78.7 µg/m³, #2 2026-09-17: 61.8 µg/m³, #5 2026-09-18: 49.6 µg/m³ 2026-09-19: 61.9 µg/m³ 2026-09-20: 64.1 µg/m³ 2026-09-21: 64.1 µg/m³ 2026-09-22: 95.1 µg/m³, #4 2026-09-23: 94.7 µg/m³, #6 2026-09-24: 62.0 µg/m³ 2026-09-25: 62.1 µg/m³ 2026-09-26: 54.8 µg/m³ 2026-09-27: 41.7 µg/m³ 2026-09-28: 43.2 µg/m³ 2026-09-29: 49.5 µg/m³ 2026-09-30: 48.9 µg/m³ 2026-10-01: 26.9 µg/m³ Smederevo 1 day #1 2026-09-02: 45.2 µg/m³ 2026-09-03: 128.0 µg/m³, #1 2026-09-04: 12.2 µg/m³ 2026-09-05: 10.0 µg/m³ 2026-09-07: 13.5 µg/m³ 2026-09-09: 16.3 µg/m³ 2026-09-10: 16.7 µg/m³ 2026-09-11: 15.2 µg/m³ 2026-09-12: 13.2 µg/m³ 2026-09-14: 15.6 µg/m³ 2026-09-15: 12.6 µg/m³ 2026-09-16: 20.6 µg/m³ 2026-09-17: 20.6 µg/m³ 2026-09-18: 12.3 µg/m³ 2026-09-19: 13.3 µg/m³ 2026-09-21: 13.6 µg/m³ 2026-09-22: 7.9 µg/m³ 2026-09-23: 7.2 µg/m³ 2026-09-24: 10.1 µg/m³ 2026-09-25: 16.0 µg/m³ 2026-09-26: 25.2 µg/m³ 2026-09-27: 22.0 µg/m³ 2026-09-28: 17.3 µg/m³ 2026-09-29: 21.0 µg/m³ 2026-09-30: 17.3 µg/m³ Neelankarai 1 day #1 2026-09-02: 44.2 µg/m³ 2026-09-03: 18.3 µg/m³ 2026-09-04: 16.4 µg/m³ 2026-09-05: 162.0 µg/m³, #1 2026-09-06: 101.0 µg/m³, #3 2026-09-07: 48.1 µg/m³ 2026-09-10: 70.4 µg/m³, #6 2026-09-24: 20.2 µg/m³ 2026-09-25: 16.7 µg/m³ 2026-09-26: 20.6 µg/m³ 2026-09-27: 32.1 µg/m³ 2026-09-28: 30.0 µg/m³ Bhāgalpur 1 day #1 2026-09-02: 78.3 µg/m³, #5 2026-09-03: 63.9 µg/m³, #6 2026-09-04: 69.3 µg/m³, #5 2026-09-05: 62.4 µg/m³ 2026-09-06: 128.0 µg/m³, #1 2026-09-08: 40.7 µg/m³ 2026-09-09: 41.3 µg/m³ 2026-09-10: 70.2 µg/m³, #7 2026-09-13: 12.7 µg/m³ 2026-09-16: 10.1 µg/m³ 2026-09-18: 40.1 µg/m³ 2026-09-19: 60.4 µg/m³ 2026-09-20: 69.7 µg/m³ 2026-09-21: 19.7 µg/m³ 2026-09-22: 34.4 µg/m³ 2026-09-23: 32.3 µg/m³ 2026-09-26: 16.2 µg/m³ Sep 2 Oct 1 Every city that was the world's most polluted on at least one of the last 30 days. Filled square: #1 that day; ring: in the top 10; dot: measured but lower. Each city's own local day.
The world's air, last 30 days 2026-09-02: 9 of 2352 cities unhealthy (0%) 2026-09-02: 32 of 2352 cities unhealthy for sensitive groups (1%) 2026-09-02: 732 of 2352 cities moderate (31%) 2026-09-02: 1579 of 2352 cities good (67%) Sep 2 2026-09-03: 1 of 2356 cities very unhealthy (0%) 2026-09-03: 12 of 2356 cities unhealthy (1%) 2026-09-03: 40 of 2356 cities unhealthy for sensitive groups (2%) 2026-09-03: 575 of 2356 cities moderate (24%) 2026-09-03: 1728 of 2356 cities good (73%) 2026-09-04: 12 of 2347 cities unhealthy (1%) 2026-09-04: 28 of 2347 cities unhealthy for sensitive groups (1%) 2026-09-04: 496 of 2347 cities moderate (21%) 2026-09-04: 1811 of 2347 cities good (77%) 2026-09-05: 1 of 2355 cities very unhealthy (0%) 2026-09-05: 12 of 2355 cities unhealthy (1%) 2026-09-05: 26 of 2355 cities unhealthy for sensitive groups (1%) 2026-09-05: 510 of 2355 cities moderate (22%) 2026-09-05: 1806 of 2355 cities good (77%) 2026-09-06: 1 of 2144 cities very unhealthy (0%) 2026-09-06: 10 of 2144 cities unhealthy (0%) 2026-09-06: 35 of 2144 cities unhealthy for sensitive groups (2%) 2026-09-06: 432 of 2144 cities moderate (20%) 2026-09-06: 1666 of 2144 cities good (78%) 2026-09-07: 12 of 2332 cities unhealthy (1%) 2026-09-07: 44 of 2332 cities unhealthy for sensitive groups (2%) 2026-09-07: 419 of 2332 cities moderate (18%) 2026-09-07: 1857 of 2332 cities good (80%) Sep 7 2026-09-08: 1 of 2296 cities very unhealthy (0%) 2026-09-08: 14 of 2296 cities unhealthy (1%) 2026-09-08: 43 of 2296 cities unhealthy for sensitive groups (2%) 2026-09-08: 485 of 2296 cities moderate (21%) 2026-09-08: 1753 of 2296 cities good (76%) 2026-09-09: 1 of 2331 cities very unhealthy (0%) 2026-09-09: 19 of 2331 cities unhealthy (1%) 2026-09-09: 41 of 2331 cities unhealthy for sensitive groups (2%) 2026-09-09: 434 of 2331 cities moderate (19%) 2026-09-09: 1836 of 2331 cities good (79%) 2026-09-10: 14 of 2277 cities unhealthy (1%) 2026-09-10: 43 of 2277 cities unhealthy for sensitive groups (2%) 2026-09-10: 392 of 2277 cities moderate (17%) 2026-09-10: 1828 of 2277 cities good (80%) 2026-09-11: 8 of 2087 cities unhealthy (0%) 2026-09-11: 47 of 2087 cities unhealthy for sensitive groups (2%) 2026-09-11: 392 of 2087 cities moderate (19%) 2026-09-11: 1640 of 2087 cities good (79%) 2026-09-12: 9 of 2141 cities unhealthy (0%) 2026-09-12: 35 of 2141 cities unhealthy for sensitive groups (2%) 2026-09-12: 490 of 2141 cities moderate (23%) 2026-09-12: 1607 of 2141 cities good (75%) 2026-09-13: 12 of 1995 cities unhealthy (1%) 2026-09-13: 41 of 1995 cities unhealthy for sensitive groups (2%) 2026-09-13: 485 of 1995 cities moderate (24%) 2026-09-13: 1457 of 1995 cities good (73%) 2026-09-14: 11 of 2148 cities unhealthy (1%) 2026-09-14: 37 of 2148 cities unhealthy for sensitive groups (2%) 2026-09-14: 418 of 2148 cities moderate (19%) 2026-09-14: 1682 of 2148 cities good (78%) Sep 14 2026-09-15: 1 of 2236 cities very unhealthy (0%) 2026-09-15: 12 of 2236 cities unhealthy (1%) 2026-09-15: 54 of 2236 cities unhealthy for sensitive groups (2%) 2026-09-15: 439 of 2236 cities moderate (20%) 2026-09-15: 1730 of 2236 cities good (77%) 2026-09-16: 12 of 2312 cities unhealthy (1%) 2026-09-16: 50 of 2312 cities unhealthy for sensitive groups (2%) 2026-09-16: 535 of 2312 cities moderate (23%) 2026-09-16: 1715 of 2312 cities good (74%) 2026-09-17: 1 of 2312 cities hazardous (0%) 2026-09-17: 8 of 2312 cities unhealthy (0%) 2026-09-17: 40 of 2312 cities unhealthy for sensitive groups (2%) 2026-09-17: 520 of 2312 cities moderate (22%) 2026-09-17: 1743 of 2312 cities good (75%) 2026-09-18: 6 of 2358 cities unhealthy (0%) 2026-09-18: 31 of 2358 cities unhealthy for sensitive groups (1%) 2026-09-18: 576 of 2358 cities moderate (24%) 2026-09-18: 1745 of 2358 cities good (74%) 2026-09-19: 1 of 2377 cities very unhealthy (0%) 2026-09-19: 23 of 2377 cities unhealthy (1%) 2026-09-19: 53 of 2377 cities unhealthy for sensitive groups (2%) 2026-09-19: 548 of 2377 cities moderate (23%) 2026-09-19: 1752 of 2377 cities good (74%) 2026-09-20: 2 of 2128 cities very unhealthy (0%) 2026-09-20: 31 of 2128 cities unhealthy (1%) 2026-09-20: 44 of 2128 cities unhealthy for sensitive groups (2%) 2026-09-20: 421 of 2128 cities moderate (20%) 2026-09-20: 1630 of 2128 cities good (77%) 2026-09-21: 1 of 2254 cities hazardous (0%) 2026-09-21: 2 of 2254 cities very unhealthy (0%) 2026-09-21: 32 of 2254 cities unhealthy (1%) 2026-09-21: 55 of 2254 cities unhealthy for sensitive groups (2%) 2026-09-21: 396 of 2254 cities moderate (18%) 2026-09-21: 1768 of 2254 cities good (78%) Sep 21 2026-09-22: 34 of 2311 cities unhealthy (1%) 2026-09-22: 65 of 2311 cities unhealthy for sensitive groups (3%) 2026-09-22: 472 of 2311 cities moderate (20%) 2026-09-22: 1740 of 2311 cities good (75%) 2026-09-23: 42 of 2367 cities unhealthy (2%) 2026-09-23: 45 of 2367 cities unhealthy for sensitive groups (2%) 2026-09-23: 453 of 2367 cities moderate (19%) 2026-09-23: 1827 of 2367 cities good (77%) 2026-09-24: 1 of 2370 cities very unhealthy (0%) 2026-09-24: 29 of 2370 cities unhealthy (1%) 2026-09-24: 54 of 2370 cities unhealthy for sensitive groups (2%) 2026-09-24: 581 of 2370 cities moderate (25%) 2026-09-24: 1705 of 2370 cities good (72%) 2026-09-25: 1 of 2338 cities very unhealthy (0%) 2026-09-25: 18 of 2338 cities unhealthy (1%) 2026-09-25: 39 of 2338 cities unhealthy for sensitive groups (2%) 2026-09-25: 694 of 2338 cities moderate (30%) 2026-09-25: 1586 of 2338 cities good (68%) 2026-09-26: 21 of 2359 cities unhealthy (1%) 2026-09-26: 31 of 2359 cities unhealthy for sensitive groups (1%) 2026-09-26: 720 of 2359 cities moderate (31%) 2026-09-26: 1587 of 2359 cities good (67%) 2026-09-27: 16 of 2260 cities unhealthy (1%) 2026-09-27: 29 of 2260 cities unhealthy for sensitive groups (1%) 2026-09-27: 639 of 2260 cities moderate (28%) 2026-09-27: 1576 of 2260 cities good (70%) 2026-09-28: 14 of 2320 cities unhealthy (1%) 2026-09-28: 47 of 2320 cities unhealthy for sensitive groups (2%) 2026-09-28: 685 of 2320 cities moderate (30%) 2026-09-28: 1574 of 2320 cities good (68%) Sep 28 2026-09-29: 15 of 2352 cities unhealthy (1%) 2026-09-29: 54 of 2352 cities unhealthy for sensitive groups (2%) 2026-09-29: 775 of 2352 cities moderate (33%) 2026-09-29: 1508 of 2352 cities good (64%) 2026-09-30: 12 of 2212 cities unhealthy (1%) 2026-09-30: 18 of 2212 cities unhealthy for sensitive groups (1%) 2026-09-30: 681 of 2212 cities moderate (31%) 2026-09-30: 1501 of 2212 cities good (68%) 2026-10-01: 6 of 1397 cities unhealthy (0%) 2026-10-01: 13 of 1397 cities unhealthy for sensitive groups (1%) 2026-10-01: 475 of 1397 cities moderate (34%) 2026-10-01: 903 of 1397 cities good (65%) Oct 1 Each day's ranked cities split by band, worst at the top: a taller red and purple share means a worse day for more of the world, not just one city.
Climbing fastest Movement shows once the board is a day old.
Cleanest air Cities with reference monitors only.
What's missing We rank only cities whose monitor data we're allowed to reuse. The government monitoring networks of China and Turkey publish no terms that allow this, so we leave them out: most cities there are missing here, not clean. The few of their cities that appear are measured by community low-cost sensors, tagged as such. Why .
Use this board SmogRank, most polluted cities, PM2.5, last 30 days to 2 Oct 2026, 01:00 UTC, smogrank.com/?w=30d.
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Updated 2026-10-02 01:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.