40 Worst AQI Cities: All Indian, Delhi Not in Top 10

In a worrying development, all top 40 spots in the list of the world’s most polluted cities were occupied by Indian cities as of October 30, 2025, based on the Air Quality Index (AQI) measured at 8:30 AM. While Delhi is typically the face of India’s pollution crisis, it ranked only 13th this time, with several smaller northern cities registering even higher AQI values, crossing dangerously into the severe and hazardous categories.

Top 10 Most Polluted Cities Globally (All Indian)

Rank	City	State	AQI
1	Sri Ganganagar	Rajasthan	830
2	Siwani	Haryana	644
3	Abohar	Punjab	634
4	Hisar	Haryana	477
5	Churu	Rajasthan	456
6	Charkhi Dadri	Haryana	448
7	Rohtak	Haryana	444
8	Nangli Bahrampur	Uttar Pradesh	438
9	Bhiwani	Haryana	437
10	Sasroli	Haryana	433

Why Delhi Isn’t in the Top 10 — But It’s Still Alarming

Delhi’s AQI of over 400 still places it in the severe category, indicating dangerously polluted air. However, several lesser-known cities surpassed it, showing how the pollution crisis has spread beyond the capital. This shift also reflects agricultural burning, geographic factors, and local weather conditions that trap pollutants in smaller towns during early winter.

What Is AQI and What Do These Numbers Mean?

AQI Range	Air Quality Category	Health Impact
0–50	Good	Minimal impact
51–100	Satisfactory	Minor discomfort
101–200	Moderately	Polluted Breathing discomfort in sensitive groups
201–300	Poor	Breathing discomfort on prolonged exposure
301–400	Very Poor	Respiratory issues, especially in vulnerable
401–500+	Severe	Serious risk of respiratory illness

Causes Behind the High Pollution Levels

Seasonal & Regional Factors

• In northern India especially, as temperatures drop and atmospheric mixing weakens, pollutants emitted near the surface stay trapped.
• This is compounded by dust from construction, unpaved roads, open waste burning and agricultural residue burning.

Emission Sources

• Stubble burning in adjoining states (Punjab, Haryana, UP) often sends smoke into nearby cities.
• Construction dust and road dust contribute significantly, especially in rapidly expanding urban‑regions.
• Vehicle emissions, often from older vehicles and diesel engines, add to the pollutant load.
• Industrial emissions and power‑generation also play a role, though in many of the worst‑AQI spots the key issue is particulate matter (PM₂.₅/PM₁₀) rather than just gases.