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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: February 10, 2025
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 Baddi Badlapur Bagalkot
Baghpat 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 Bundi Buxar
Byasanagar Byrnihat Chamarajanagar Chandigarh
Chandrapur Charkhi Dadri 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 Hassan
Haveri Hisar 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 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 Milupara
Mira-bhayandar Moradabad Motihari Mumbai
Munger Muzaffarnagar Muzaffarpur Mysuru
Nagaon Nagapattinam Nagaur Nagpur
Naharlagun Nalbari Nanded Nandesari
Narnaul Nashik Navi Mumbai Nayagarh
Noida Ooty Pali Palkalaiperur
Palwal Panchkula Panipat Parbhani
Pathardih Patiala Patna Pimpri-chinchwad
Pithampur Pratapgarh Prayagraj Puducherry
Pudukottai Pune Purnia Raichur
Raipur Rairangpur Rajamahendravaram Rajgir
Rajsamand Ramanagara Ramanathapuram Ranipet
Ratlam Rishikesh Rohtak 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 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 Yamuna Nagar
More Cities

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.

What are the 6 categories of AQI?

The 6 categories of AQI are: 0-50: Good 51-100: Moderate 101-200: Poor 201-300: Unhealthy 301-400: Severe 401-500+: Hazardous

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