SmogRank / Episodes / India
North-western India, April 2025
For 3 days, from 6 to 8 April 2025, 13 cities in India had PM2.5 at least twice their usual for the time of year. The worst reading was Dādri, Uttar Pradesh, India: 243.0 µg/m³ on 7 April, about 3.6× its usual 66.8.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 13 in 1 country
Days 3 6 to 8 April 2025
Worst day 8 April 9 cities counted
Furthest above usual 18× Ropar
Day by day
Play 8 April 9 cities at twice their usual or more
Dausa Jaipur Alwar Tonk Karauli Sīkar Bharatpur Jhunjhunūn Bhiwadi Būndi Vrindāvan Dhaulpur Dera Māndi Chūru Aya Nagar Kota Najafgarh Agra Bārān Delhi Bawāna Greater Noida Narela Loni Ghāziābād Khurja Gwalior Bhilwara Bulandshahr Bāghpat Fīrozābād Hāpur Meerut Chittorgarh Muzaffarnagar Rājsamand Bikaner Pāli Nandri Hanumāngarh Morādābād Jodhpur Pratāpgarh Patiāla Udaipur Bareilly Gobindgarh Sri Ganganagar Khanna Ujjain Ratlām Chandigarh Bānswāra Dehradun Jalor Sirohi Bhopal Dūngarpur Baddi Saugor Rajākheri Mandideep Kanpur Indore Pithampur Jalandhar Damoh Amritsar Gandhinagar Ahmedabad Jabalpur Undera Ajmer Nāgaur Noida Bathinda Ludhiana Dewas Jhālāwār Sawai Madhopur Mohali Dādri Jhānsi Rishīkesh Ropar 3 Apr 4 5 6 7 8 9 10 11 Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.
How it spread
Dādri Dādri, 3 April: 221.0 µg/m³, 3.3× usual Dādri, 4 April: 196.0 µg/m³, 2.9× usual Dādri, 5 April: 122.0 µg/m³, 1.8× usual Dādri, 6 April: no reading Dādri, 7 April: 243.0 µg/m³, 3.6× usual Dādri, 8 April: 213.0 µg/m³, 3.2× usual Dādri, 9 April: no reading Dādri, 10 April: no reading Dādri, 11 April: no reading Ropar Ropar, 3 April: 70.3 µg/m³, 6.6× usual Ropar, 4 April: 63.7 µg/m³, 6.0× usual Ropar, 5 April: 61.1 µg/m³, 5.8× usual Ropar, 6 April: 58.7 µg/m³, 5.5× usual Ropar, 7 April: 76.6 µg/m³, 7.2× usual Ropar, 8 April: 187.0 µg/m³, 18× usual Ropar, 9 April: no reading Ropar, 10 April: no reading Ropar, 11 April: no reading Jhānsi Jhānsi, 3 April: 51.7 µg/m³, 2.5× usual Jhānsi, 4 April: 68.0 µg/m³, 3.3× usual Jhānsi, 5 April: 92.8 µg/m³, 4.5× usual Jhānsi, 6 April: 99.3 µg/m³, 4.8× usual Jhānsi, 7 April: 74.2 µg/m³, 3.6× usual Jhānsi, 8 April: 48.5 µg/m³, 2.4× usual Jhānsi, 9 April: no reading Jhānsi, 10 April: no reading Jhānsi, 11 April: no reading Rishīkesh Rishīkesh, 3 April: 41.0 µg/m³, 8.2× usual Rishīkesh, 4 April: 37.9 µg/m³, 7.6× usual Rishīkesh, 5 April: 42.4 µg/m³, 8.5× usual Rishīkesh, 6 April: 42.6 µg/m³, 8.5× usual Rishīkesh, 7 April: 38.5 µg/m³, 7.7× usual Rishīkesh, 8 April: 63.5 µg/m³, 13× usual Rishīkesh, 9 April: no reading Rishīkesh, 10 April: no reading Rishīkesh, 11 April: no reading Sawai Madhopur Sawai Madhopur, 3 April: 54.3 µg/m³, 1.9× usual Sawai Madhopur, 4 April: 63.7 µg/m³, 2.2× usual Sawai Madhopur, 5 April: 65.9 µg/m³, 2.3× usual Sawai Madhopur, 6 April: 66.2 µg/m³, 2.3× usual Sawai Madhopur, 7 April: 64.4 µg/m³, 2.2× usual Sawai Madhopur, 8 April: 63.7 µg/m³, 2.2× usual Sawai Madhopur, 9 April: no reading Sawai Madhopur, 10 April: no reading Sawai Madhopur, 11 April: no reading Dewas Dewas, 3 April: 64.6 µg/m³, 1.6× usual Dewas, 4 April: 69.7 µg/m³, 1.7× usual Dewas, 5 April: 71.7 µg/m³, 1.8× usual Dewas, 6 April: 87.3 µg/m³, 2.2× usual Dewas, 7 April: no reading Dewas, 8 April: 93.4 µg/m³, 2.3× usual Dewas, 9 April: no reading Dewas, 10 April: no reading Dewas, 11 April: no reading Jhālāwār Jhālāwār, 3 April: 36.4 µg/m³, 1.3× usual Jhālāwār, 4 April: 45.4 µg/m³, 1.6× usual Jhālāwār, 5 April: 41.3 µg/m³, 1.4× usual Jhālāwār, 6 April: 67.5 µg/m³, 2.3× usual Jhālāwār, 7 April: 40.5 µg/m³, 1.4× usual Jhālāwār, 8 April: 41.3 µg/m³, 1.4× usual Jhālāwār, 9 April: no reading Jhālāwār, 10 April: no reading Jhālāwār, 11 April: no reading Nāgaur Nāgaur, 3 April: 34.6 µg/m³, 1.5× usual Nāgaur, 4 April: 37.0 µg/m³, 1.6× usual Nāgaur, 5 April: 44.1 µg/m³, 1.9× usual Nāgaur, 6 April: 48.4 µg/m³, 2.1× usual Nāgaur, 7 April: 34.7 µg/m³, 1.5× usual Nāgaur, 8 April: 30.7 µg/m³, 1.3× usual Nāgaur, 9 April: no reading Nāgaur, 10 April: no reading Nāgaur, 11 April: no reading Noida Noida, 3 April: 63.7 µg/m³, 1.2× usual Noida, 4 April: 44.6 µg/m³, 0.8× usual Noida, 5 April: 39.4 µg/m³, 0.7× usual Noida, 6 April: 58.7 µg/m³, 1.1× usual Noida, 7 April: 118.0 µg/m³, 2.2× usual Noida, 8 April: 71.1 µg/m³, 1.3× usual Noida, 9 April: no reading Noida, 10 April: no reading Noida, 11 April: no reading Ajmer Ajmer, 3 April: 47.9 µg/m³, 1.3× usual Ajmer, 4 April: 47.1 µg/m³, 1.2× usual Ajmer, 5 April: 41.7 µg/m³, 1.1× usual Ajmer, 6 April: 63.4 µg/m³, 1.7× usual Ajmer, 7 April: 77.9 µg/m³, 2.0× usual Ajmer, 8 April: 52.3 µg/m³, 1.4× usual Ajmer, 9 April: no reading Ajmer, 10 April: no reading Ajmer, 11 April: no reading Mohali Mohali, 3 April: 38.6 µg/m³, 1.4× usual Mohali, 4 April: 44.6 µg/m³, 1.6× usual Mohali, 5 April: no reading Mohali, 6 April: no reading Mohali, 7 April: 62.2 µg/m³, 2.2× usual Mohali, 8 April: 68.1 µg/m³, 2.4× usual Mohali, 9 April: no reading Mohali, 10 April: no reading Mohali, 11 April: no reading Ludhiana Ludhiana, 3 April: 56.0 µg/m³, 1.2× usual Ludhiana, 4 April: 57.0 µg/m³, 1.2× usual Ludhiana, 5 April: 54.2 µg/m³, 1.1× usual Ludhiana, 6 April: 57.6 µg/m³, 1.2× usual Ludhiana, 7 April: 74.1 µg/m³, 1.5× usual Ludhiana, 8 April: 113.0 µg/m³, 2.3× usual Ludhiana, 9 April: no reading Ludhiana, 10 April: no reading Ludhiana, 11 April: no reading Bathinda Bathinda, 3 April: 40.6 µg/m³, 1.5× usual Bathinda, 4 April: 22.9 µg/m³, 0.8× usual Bathinda, 5 April: no reading Bathinda, 6 April: 28.0 µg/m³, 1.0× usual Bathinda, 7 April: 46.9 µg/m³, 1.7× usual Bathinda, 8 April: 63.5 µg/m³, 2.3× usual Bathinda, 9 April: no reading Bathinda, 10 April: no reading Bathinda, 11 April: no reading 3 Apr 4 5 6 7 8 9 10 11 Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Ropar Punjab, India 2 8 April 10.6 18× Rishīkesh Uttarakhand, India 2 8 April 1.3 13× Jhānsi Uttar Pradesh, India 3 6 April 20.5 4.8× Dādri Uttar Pradesh, India 2 7 April 66.8 3.6× Mohali Punjab, India 2 8 April 27.8 2.4× Ludhiana Punjab, India 1 8 April 48.2 2.3× Jhālāwār Rajasthan, India 1 6 April 28.9 2.3× Dewas Madhya Pradesh, India 2 8 April 40.6 2.3× Bathinda Punjab, India 1 8 April 27.8 2.3× Sawai Madhopur Rajasthan, India 3 6 April 29.1 2.3× Noida Uttar Pradesh, India 1 7 April 54.8 2.2× Nāgaur Rajasthan, India 1 6 April 23.1 2.1× Ajmer Rajasthan, India 1 7 April 38.2 2.0×
Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.
Against other episodes in India
Number 24 of 54 episodes in India since our records began, by cities reached.
North-western India, October 2025 170 North-western India, September 2026 57 North-western India, July 2026 51 North-western India, June 2025 47 North-eastern India, March and April 2025 45 North-western India, November 2025 27 North-western India, April 2026 26 North-western India, April and May 2025 26 North-western India and Pakistan, March 2026 25 North-western India, May 2025 23 North-eastern India, July 2026 22 North-eastern India, April 2025 20 North-western India, April 2025 13 Bars: cities reached; colour: the level of the episode's highest daily reading. All 54 .
Use this page SmogRank, North-western India, April 2025: 13 cities with PM2.5 at twice their usual or more, 6 to 8 April 2025, smogrank.com/episodes/2025-04-north-western-india (accessed 3 October 2026).
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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms .
An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes . Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.
