SmogRank / World / India / Uttar Pradesh / September 2025

Most polluted cities in Uttar Pradesh, India, September 2025

21 cities in Uttar Pradesh, India ranked by their average PM2.5 over the 30 days. Worst: Loni at 47.3 µg/m³, #19 of 3,052 cities in the world. Cleanest: Prayagraj at 18.5. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Loni 75% 70%0
Every city in Uttar Pradesh, India ranked for September 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Loni
    75%
  2. 2Gorakhpur
    66%
  3. 3Muzaffarnagar
    59%
  4. 4Greater Noida
    58%
  5. 5Dādri
    54%
  6. 6Ghāziābād
    52%
  7. 7Jhānsi
    47%
  8. 8Hāpur
    46%
  9. 9Noida
    43%
  10. 10Bulandshahr
    41%
  11. 11Lucknow
    40%
  12. 12Agra
    40%
  13. 13Morādābād
    33%
  14. 14Meerut
    33%
  15. 15Kanpur
    27%
  16. 16Bareilly
    7%
  17. 17Vrindāvan
    4%
  18. 18Fīrozābād
    3%
  19. 19Varanasi
    3%
  20. 20Khurja
    0%
  21. 21Prayagraj
    0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

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SmogRank, most polluted cities in Uttar Pradesh, India, PM2.5, September 2025, smogrank.com/in/region/uttar-pradesh/history/2025-09 (accessed 7 Oct 2026).

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