SmogRank / Episodes / India
North-eastern India, April 2025
For 6 days, from 21 to 26 April 2025, 20 cities in India had PM2.5 at least twice their usual for the time of year. The worst reading was Singrauli, Madhya Pradesh, India: 160.0 µg/m³ on 26 April, about 2.5× its usual 63.2.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 20 in 1 country
Days 6 21 to 26 April 2025
Worst day 23 April 9 cities counted
Furthest above usual 3.9× Aurangābād
Day by day
Play 23 April 9 cities at twice their usual or more
Varanasi Buxar Arrah Chāpra Rājgīr Patna Siwān Hājīpur Rourkela Bilāspur Muzaffarpur Satna Samāstipur Keonjhargarh Saharsa Āsansol Lucknow Rānīganj Jabalpur Kanpur Durgapur Baripāda Purnia Rajākheri Kishanganj Haldia Barbil Arāria Joda Gorakhpur Prayagraj Munger Bhāgalpur Bhelai Gaya Maihar Mothīhāri Belpahar Singrauli Begusarai Rairangpur Sasarām Katihar Bettiah Damoh Aurangābād 18 Apr 19 20 21 22 23 24 25 26 27 28 29 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
Aurangābād Aurangābād, 18 April: 54.0 µg/m³, 2.0× usual Aurangābād, 19 April: no reading Aurangābād, 20 April: 68.3 µg/m³, 2.5× usual Aurangābād, 21 April: 88.7 µg/m³, 3.3× usual Aurangābād, 22 April: 104.0 µg/m³, 3.9× usual Aurangābād, 23 April: 90.2 µg/m³, 3.4× usual Aurangābād, 24 April: no reading Aurangābād, 25 April: no reading Aurangābād, 26 April: no reading Aurangābād, 27 April: 63.3 µg/m³, 2.4× usual Aurangābād, 28 April: no reading Aurangābād, 29 April: 53.2 µg/m³, 2.0× usual Rairangpur Rairangpur, 18 April: no reading Rairangpur, 19 April: no reading Rairangpur, 20 April: 51.3 µg/m³, 2.1× usual Rairangpur, 21 April: no reading Rairangpur, 22 April: 64.9 µg/m³, 2.6× usual Rairangpur, 23 April: 62.8 µg/m³, 2.5× usual Rairangpur, 24 April: 61.2 µg/m³, 2.4× usual Rairangpur, 25 April: 63.7 µg/m³, 2.5× usual Rairangpur, 26 April: 53.5 µg/m³, 2.1× usual Rairangpur, 27 April: 42.3 µg/m³, 1.7× usual Rairangpur, 28 April: 57.7 µg/m³, 2.3× usual Rairangpur, 29 April: no reading Begusarai Begusarai, 18 April: no reading Begusarai, 19 April: no reading Begusarai, 20 April: no reading Begusarai, 21 April: 103.0 µg/m³, 2.5× usual Begusarai, 22 April: no reading Begusarai, 23 April: 97.4 µg/m³, 2.4× usual Begusarai, 24 April: 78.6 µg/m³, 1.9× usual Begusarai, 25 April: 71.7 µg/m³, 1.7× usual Begusarai, 26 April: no reading Begusarai, 27 April: no reading Begusarai, 28 April: no reading Begusarai, 29 April: no reading Sasarām Sasarām, 18 April: 50.1 µg/m³, 1.2× usual Sasarām, 19 April: 50.7 µg/m³, 1.2× usual Sasarām, 20 April: 78.3 µg/m³, 1.8× usual Sasarām, 21 April: 95.3 µg/m³, 2.2× usual Sasarām, 22 April: 120.0 µg/m³, 2.8× usual Sasarām, 23 April: 107.0 µg/m³, 2.5× usual Sasarām, 24 April: 90.0 µg/m³, 2.1× usual Sasarām, 25 April: 73.8 µg/m³, 1.7× usual Sasarām, 26 April: 70.1 µg/m³, 1.6× usual Sasarām, 27 April: 65.9 µg/m³, 1.5× usual Sasarām, 28 April: 40.5 µg/m³, 0.9× usual Sasarām, 29 April: 45.8 µg/m³, 1.1× usual Gaya Gaya, 18 April: 28.9 µg/m³, 0.8× usual Gaya, 19 April: 38.0 µg/m³, 1.1× usual Gaya, 20 April: 63.3 µg/m³, 1.8× usual Gaya, 21 April: 81.4 µg/m³, 2.3× usual Gaya, 22 April: 68.3 µg/m³, 1.9× usual Gaya, 23 April: 47.6 µg/m³, 1.3× usual Gaya, 24 April: 51.9 µg/m³, 1.5× usual Gaya, 25 April: 54.2 µg/m³, 1.5× usual Gaya, 26 April: 59.2 µg/m³, 1.7× usual Gaya, 27 April: 33.3 µg/m³, 0.9× usual Gaya, 28 April: 22.7 µg/m³, 0.6× usual Gaya, 29 April: 27.1 µg/m³, 0.8× usual Bhelai Bhelai, 18 April: 52.2 µg/m³, 1.5× usual Bhelai, 19 April: 40.0 µg/m³, 1.1× usual Bhelai, 20 April: 46.4 µg/m³, 1.3× usual Bhelai, 21 April: 74.0 µg/m³, 2.1× usual Bhelai, 22 April: 82.4 µg/m³, 2.3× usual Bhelai, 23 April: 79.9 µg/m³, 2.3× usual Bhelai, 24 April: 54.4 µg/m³, 1.5× usual Bhelai, 25 April: no reading Bhelai, 26 April: no reading Bhelai, 27 April: 34.1 µg/m³, 1.0× usual Bhelai, 28 April: 33.7 µg/m³, 1.0× usual Bhelai, 29 April: 29.4 µg/m³, 0.8× usual Bhāgalpur Bhāgalpur, 18 April: 22.5 µg/m³, 0.7× usual Bhāgalpur, 19 April: 45.8 µg/m³, 1.4× usual Bhāgalpur, 20 April: 53.7 µg/m³, 1.6× usual Bhāgalpur, 21 April: 72.0 µg/m³, 2.2× usual Bhāgalpur, 22 April: 47.8 µg/m³, 1.4× usual Bhāgalpur, 23 April: 37.2 µg/m³, 1.1× usual Bhāgalpur, 24 April: 33.2 µg/m³, 1.0× usual Bhāgalpur, 25 April: 34.5 µg/m³, 1.0× usual Bhāgalpur, 26 April: 38.0 µg/m³, 1.1× usual Bhāgalpur, 27 April: 27.3 µg/m³, 0.8× usual Bhāgalpur, 28 April: 14.8 µg/m³, 0.4× usual Bhāgalpur, 29 April: 12.9 µg/m³, 0.4× usual Prayagraj Prayagraj, 18 April: 42.9 µg/m³, 1.6× usual Prayagraj, 19 April: 33.5 µg/m³, 1.3× usual Prayagraj, 20 April: 43.3 µg/m³, 1.6× usual Prayagraj, 21 April: 54.8 µg/m³, 2.1× usual Prayagraj, 22 April: 48.1 µg/m³, 1.8× usual Prayagraj, 23 April: 33.9 µg/m³, 1.3× usual Prayagraj, 24 April: 33.3 µg/m³, 1.3× usual Prayagraj, 25 April: 32.6 µg/m³, 1.2× usual Prayagraj, 26 April: 37.3 µg/m³, 1.4× usual Prayagraj, 27 April: 29.1 µg/m³, 1.1× usual Prayagraj, 28 April: 29.2 µg/m³, 1.1× usual Prayagraj, 29 April: 31.6 µg/m³, 1.2× usual Singrauli Singrauli, 18 April: 84.4 µg/m³, 1.3× usual Singrauli, 19 April: 85.4 µg/m³, 1.4× usual Singrauli, 20 April: 58.3 µg/m³, 0.9× usual Singrauli, 21 April: 115.0 µg/m³, 1.8× usual Singrauli, 22 April: 130.0 µg/m³, 2.1× usual Singrauli, 23 April: 116.0 µg/m³, 1.8× usual Singrauli, 24 April: 128.0 µg/m³, 2.0× usual Singrauli, 25 April: 74.8 µg/m³, 1.2× usual Singrauli, 26 April: 160.0 µg/m³, 2.5× usual Singrauli, 27 April: 27.0 µg/m³, 0.4× usual Singrauli, 28 April: 35.5 µg/m³, 0.6× usual Singrauli, 29 April: no reading Gorakhpur Gorakhpur, 18 April: 34.4 µg/m³, 0.8× usual Gorakhpur, 19 April: 42.8 µg/m³, 1.0× usual Gorakhpur, 20 April: 53.1 µg/m³, 1.2× usual Gorakhpur, 21 April: 66.4 µg/m³, 1.5× usual Gorakhpur, 22 April: 92.4 µg/m³, 2.1× usual Gorakhpur, 23 April: 33.8 µg/m³, 0.8× usual Gorakhpur, 24 April: 48.5 µg/m³, 1.1× usual Gorakhpur, 25 April: 55.0 µg/m³, 1.3× usual Gorakhpur, 26 April: 81.4 µg/m³, 1.9× usual Gorakhpur, 27 April: 98.5 µg/m³, 2.2× usual Gorakhpur, 28 April: 33.4 µg/m³, 0.8× usual Gorakhpur, 29 April: 33.3 µg/m³, 0.8× usual Katihar Katihar, 18 April: 16.7 µg/m³, 1.0× usual Katihar, 19 April: 22.7 µg/m³, 1.4× usual Katihar, 20 April: 29.9 µg/m³, 1.8× usual Katihar, 21 April: 30.3 µg/m³, 1.8× usual Katihar, 22 April: 38.4 µg/m³, 2.3× usual Katihar, 23 April: 37.8 µg/m³, 2.3× usual Katihar, 24 April: 45.7 µg/m³, 2.8× usual Katihar, 25 April: 47.0 µg/m³, 2.8× usual Katihar, 26 April: 49.3 µg/m³, 3.0× usual Katihar, 27 April: no reading Katihar, 28 April: 7.8 µg/m³, 0.5× usual Katihar, 29 April: 13.3 µg/m³, 0.8× usual Bettiah Bettiah, 18 April: 14.9 µg/m³, 0.8× usual Bettiah, 19 April: 23.3 µg/m³, 1.2× usual Bettiah, 20 April: 31.5 µg/m³, 1.7× usual Bettiah, 21 April: 33.3 µg/m³, 1.8× usual Bettiah, 22 April: 35.7 µg/m³, 1.9× usual Bettiah, 23 April: 40.4 µg/m³, 2.1× usual Bettiah, 24 April: 36.8 µg/m³, 2.0× usual Bettiah, 25 April: 52.4 µg/m³, 2.8× usual Bettiah, 26 April: 59.2 µg/m³, 3.1× usual Bettiah, 27 April: no reading Bettiah, 28 April: 11.5 µg/m³, 0.6× usual Bettiah, 29 April: no reading Belpahar Belpahar, 18 April: no reading Belpahar, 19 April: no reading Belpahar, 20 April: no reading Belpahar, 21 April: no reading Belpahar, 22 April: 40.2 µg/m³, 1.4× usual Belpahar, 23 April: 71.5 µg/m³, 2.5× usual Belpahar, 24 April: 73.5 µg/m³, 2.5× usual Belpahar, 25 April: 64.4 µg/m³, 2.2× usual Belpahar, 26 April: no reading Belpahar, 27 April: no reading Belpahar, 28 April: 27.6 µg/m³, 1.0× usual Belpahar, 29 April: 30.7 µg/m³, 1.1× usual Munger Munger, 18 April: 6.2 µg/m³, 0.2× usual Munger, 19 April: 21.4 µg/m³, 0.8× usual Munger, 20 April: 40.6 µg/m³, 1.5× usual Munger, 21 April: 32.9 µg/m³, 1.2× usual Munger, 22 April: 36.8 µg/m³, 1.4× usual Munger, 23 April: 58.5 µg/m³, 2.2× usual Munger, 24 April: 47.3 µg/m³, 1.8× usual Munger, 25 April: 41.7 µg/m³, 1.6× usual Munger, 26 April: 41.8 µg/m³, 1.6× usual Munger, 27 April: 33.3 µg/m³, 1.2× usual Munger, 28 April: 11.0 µg/m³, 0.4× usual Munger, 29 April: 14.0 µg/m³, 0.5× usual Damoh Damoh, 18 April: 49.0 µg/m³, 1.8× usual Damoh, 19 April: 51.3 µg/m³, 1.9× usual Damoh, 20 April: 50.1 µg/m³, 1.8× usual Damoh, 21 April: 52.3 µg/m³, 1.9× usual Damoh, 22 April: 28.1 µg/m³, 1.0× usual Damoh, 23 April: 36.0 µg/m³, 1.3× usual Damoh, 24 April: 99.9 µg/m³, 3.6× usual Damoh, 25 April: no reading Damoh, 26 April: no reading Damoh, 27 April: 32.9 µg/m³, 1.2× usual Damoh, 28 April: 20.0 µg/m³, 0.7× usual Damoh, 29 April: 19.7 µg/m³, 0.7× usual Joda Joda, 18 April: 35.2 µg/m³, 0.8× usual Joda, 19 April: 56.2 µg/m³, 1.3× usual Joda, 20 April: 53.2 µg/m³, 1.3× usual Joda, 21 April: 60.5 µg/m³, 1.4× usual Joda, 22 April: 70.7 µg/m³, 1.7× usual Joda, 23 April: 76.9 µg/m³, 1.8× usual Joda, 24 April: 84.6 µg/m³, 2.0× usual Joda, 25 April: no reading Joda, 26 April: no reading Joda, 27 April: no reading Joda, 28 April: no reading Joda, 29 April: no reading Mothīhāri Mothīhāri, 18 April: 13.6 µg/m³, 0.4× usual Mothīhāri, 19 April: 20.3 µg/m³, 0.6× usual Mothīhāri, 20 April: no reading Mothīhāri, 21 April: no reading Mothīhāri, 22 April: 27.8 µg/m³, 0.9× usual Mothīhāri, 23 April: 31.8 µg/m³, 1.0× usual Mothīhāri, 24 April: 57.3 µg/m³, 1.8× usual Mothīhāri, 25 April: 81.3 µg/m³, 2.5× usual Mothīhāri, 26 April: 66.5 µg/m³, 2.0× usual Mothīhāri, 27 April: no reading Mothīhāri, 28 April: no reading Mothīhāri, 29 April: 19.9 µg/m³, 0.6× usual Barbil Barbil, 18 April: 29.1 µg/m³, 0.8× usual Barbil, 19 April: no reading Barbil, 20 April: 49.0 µg/m³, 1.3× usual Barbil, 21 April: 43.8 µg/m³, 1.2× usual Barbil, 22 April: 54.6 µg/m³, 1.5× usual Barbil, 23 April: 59.5 µg/m³, 1.6× usual Barbil, 24 April: 74.7 µg/m³, 2.0× usual Barbil, 25 April: 74.3 µg/m³, 2.0× usual Barbil, 26 April: 63.8 µg/m³, 1.7× usual Barbil, 27 April: no reading Barbil, 28 April: no reading Barbil, 29 April: 28.4 µg/m³, 0.8× usual Arāria Arāria, 18 April: 18.7 µg/m³, 0.6× usual Arāria, 19 April: 23.8 µg/m³, 0.8× usual Arāria, 20 April: 42.1 µg/m³, 1.4× usual Arāria, 21 April: 40.0 µg/m³, 1.3× usual Arāria, 22 April: 52.4 µg/m³, 1.7× usual Arāria, 23 April: 37.6 µg/m³, 1.2× usual Arāria, 24 April: 52.5 µg/m³, 1.7× usual Arāria, 25 April: 62.9 µg/m³, 2.0× usual Arāria, 26 April: 51.4 µg/m³, 1.7× usual Arāria, 27 April: no reading Arāria, 28 April: no reading Arāria, 29 April: 22.7 µg/m³, 0.7× usual Maihar Maihar, 18 April: 15.6 µg/m³, 1.3× usual Maihar, 19 April: 20.5 µg/m³, 1.7× usual Maihar, 20 April: 14.3 µg/m³, 1.2× usual Maihar, 21 April: 14.6 µg/m³, 1.2× usual Maihar, 22 April: 11.2 µg/m³, 0.9× usual Maihar, 23 April: 18.1 µg/m³, 1.5× usual Maihar, 24 April: 21.3 µg/m³, 1.8× usual Maihar, 25 April: 29.5 µg/m³, 2.4× usual Maihar, 26 April: no reading Maihar, 27 April: no reading Maihar, 28 April: no reading Maihar, 29 April: no reading 18 Apr 20 22 24 26 28 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
Aurangābād Bihar, India 3 22 April 26.8 3.9× Damoh Madhya Pradesh, India 1 24 April 27.5 3.6× Bettiah Bihar, India 4 26 April 18.8 3.1× Katihar Bihar, India 5 26 April 16.6 3.0× Sasarām Bihar, India 6 22 April 42.8 2.8× Rairangpur Odisha, India 4 22 April 25.0 2.6× Belpahar Odisha, India 3 24 April 28.9 2.5× Singrauli Madhya Pradesh, India 3 26 April 63.2 2.5× Begusarai Bihar, India 3 21 April 41.2 2.5× Mothīhāri Bihar, India 2 25 April 32.7 2.5× Maihar Madhya Pradesh, India 1 25 April 12.1 2.4× Bhelai Chhattisgarh, India 3 22 April 35.1 2.3× Gaya Bihar, India 1 21 April 35.3 2.3× Gorakhpur Uttar Pradesh, India 1 27 April 43.8 2.2× Munger Bihar, India 1 23 April 26.7 2.2× Bhāgalpur Bihar, India 1 21 April 33.1 2.2× Prayagraj Uttar Pradesh, India 1 21 April 26.5 2.1× Arāria Bihar, India 1 25 April 30.7 2.0× Joda Odisha, India 1 24 April 41.9 2.0× Barbil Odisha, India 1 24 April 37.2 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 12 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 Bars: cities reached; colour: the level of the episode's highest daily reading. All 54 .
Use this page SmogRank, North-eastern India, April 2025: 20 cities with PM2.5 at twice their usual or more, 21 to 26 April 2025, smogrank.com/episodes/2025-04-north-eastern-india (accessed 2 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.
