What is Air Quality Index (AQI)?

The air quality in any city is determined by the Air Quality Index (AQI). This indicator is developed by government agencies. To assess a city's AQI, various pollutants are considered. During the evaluation, the concentration of these pollutants in the air is measured. The AQI levels help inform people about whether air pollution is increasing or decreasing. Additionally, it is explained how air pollution can be harmful to people's health and in what ways. When the AQI rises, people are advised to take precautions, such as wearing masks outdoors and using air purifiers indoors.

Most Polluted City/States in India

Updated: April 04, 2026

Rank	City, States	AQI
1	Greater Noida, Uttar Pradesh	325
2	Ghaziabad, Uttar Pradesh	300
3	Gurugram, Haryana	295
4	Noida, Uttar Pradesh	278
5	Charkhi Dadri, Haryana	267
6	Delhi, Delhi	266
7	Barbil, Odisha	263
8	Rohtak, Haryana	260
9	Manesar, Haryana	259
10	Singrauli, Madhya Pradesh	254

Source : Central Pollution Control Board

Agartala	Agra	Ahmedabad	Ahmednagar
Aizawl	Ajmer	Akola	Alwar
Amaravati	Ambala	Amravati	Amritsar
Anantapur	Angul	Ankleshwar	Araria
Ariyalur	Arrah	Asansol	Aurangabad
Aurangabad	Aurangabad (bihar)	Baddi	Badlapur
Bagalkot	Baghpat	Baghpat Very	Bahadurgarh
Balasore	Ballabgarh	Banswara	Baran
Barbil	Bareilly	Baripada	Barmer
Barrackpore	Bathinda	Begusarai	Belapur
Belgaum	Bengaluru	Bettiah	Bhagalpur
Bharatpur	Bhilai	Bhilwara	Bhiwadi
Bhiwandi	Bhiwani	Bhopal	Bhubaneswar
Bidar	Bihar Sharif	Bikaner	Bilaspur
Bileipada	Boisar	Brajrajnagar	Bulandshahr
Bulandshahr Very	Bundi	Buxar	Byasanagar
Byrnihat	Chamarajanagar	Chandigarh	Chandrapur
Charkhi Dadri	Charkhi Dadri Very	Chengalpattu	Chennai
Chhal	Chhapra	Chikkaballapur	Chikkamagaluru
Chittoor	Chittorgarh	Churu	Coimbatore
Cuddalore	Cuttack	Damoh	Dausa
Davanagere	Dehradun	Delhi	Dewas
Dhanbad	Dharuhera	Dharwad	Dholpur
Dhule	Dindigul	Dungarpur	Durgapur
Eloor	Faridabad	Fatehabad	Firozabad
Gadag	Gandhinagar	Gangtok	Gaya
Ghaziabad	Gorakhpur	Greater Noida	Gummidipoondi
Gurugram	Guwahati	Gwalior	Hajipur
Haldia	Hanumangarh	Hapur	Hapur Very
Hassan	Haveri	Hisar	Hosur
Howrah	Hubballi	Hyderabad	Imphal
Indore	Jabalpur	Jaipur	Jaisalmer
Jalandhar	Jalgaon	Jalna	Jalore
Jhalawar	Jhansi	Jhunjhunu	Jind
Jodhpur	Jorapokhar	Kadapa	Kaithal
Kalaburagi	Kalyan	Kanchipuram	Kannur
Kanpur	Karauli	Karnal	Karur
Karwar	Kashipur	Katihar	Katni
Keonjhar	Khanna	Khurja	Khurja Very
Kishanganj	Kohima	Kolar	Kolhapur
Kolkata	Kollam	Koppal	Korba
Kota	Kunjemura	Kurukshetra	Latur
Lucknow	Ludhiana	Madikeri	Madurai
Mahad	Maihar	Malegaon	Mandi Gobindgarh
Mandideep	Mandikhera	Manesar	Mangalore
Manguraha	Meerut	Meerut Very	Milupara
Mira-bhayandar	Moradabad	Motihari	Mumbai
Munger	Muzaffarnagar	Muzaffarnagar Very	Muzaffarpur
Mysuru	Nagaon	Nagapattinam	Nagaur
Nagpur	Naharlagun	Nalbari	Namakkal
Nanded	Nandesari	Narnaul	Nashik
Navi Mumbai	Nayagarh	Noida	Ooty
Pali	Palkalaiperur	Palwal	Panchgaon
Panchkula	Panipat	Parbhani	Pathardih
Patiala	Patna	Perundurai	Pimpri-chinchwad
Pithampur	Pratapgarh	Prayagraj	Puducherry
Pudukottai	Pune	Purnia	Raichur
Raipur	Rairangpur	Rajamahendravaram	Rajgir
Rajsamand	Ramanagara	Ramanathapuram	Ranipet
Ratlam	Rishikesh	Rohtak	Rohtak Very
Rourkela	Rupnagar	Sagar	Saharsa
Salem	Samastipur	Sangli	Sasaram
Satna	Sawai Madhopur	Shillong	Shivamogga
Sikar	Silchar	Siliguri	Singrauli
Sirohi	Sirsa	Sivasagar	Siwan
Solapur	Sonipat	Sri Ganganagar	Sri Vijaya Puram
Suakati	Surat	Talcher	Tensa
Thane	Thanjavur	Thiruvananthapuram	Thoothukudi
Thrissur	Tiruchirappalli	Tirumala	Tirunelveli
Tirupati	Tirupur	Tonk	Tumakuru
Tumidih	Udaipur	Udupi	Ujjain
Ulhasnagar	Vapi	Varanasi	Vatva
Vellore	Vijayapura	Vijayawada	Virar
Virudhunagar	Visakhapatnam	Vrindavan	Yadgir
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Frequently Asked Questions

What is a good AQI level?

A good AQI level is between 0 and 50, indicating air quality that poses little or no risk to health.

What is the safe range of AQI?

The safe range of AQI is from 0 to 100, covering the categories of "Good" (0-50) and "Moderate" (51-100).

What are the criteria for AQI?

AQI criteria include measuring the concentration of pollutants like PM2.5, PM10, ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide, and ammonia over a specified averaging period.

What are the 8 parameters of AQI?

The 8 parameters of AQI are: Particulate Matter (PM10), Particulate Matter (PM2.5), Ozone (O3), Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2), Carbon Monoxide (CO), Ammonia (NH3), and Lead (Pb).

How is AQI calculated?

AQI is calculated using pollutant concentration data, which is converted into an AQI value for each pollutant through specific formulae. The highest value among these is reported as the overall AQI for the location.