SmogRank / Episodes / India

North-eastern India, April 2026

For 2 days, from 24 to 25 April 2026, 12 cities in India had PM2.5 at least twice their usual for the time of year. The worst reading was Singrauli, Madhya Pradesh, India: 145.0 µg/m³ on 25 April, about 2.4× its usual 61.2.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached12in 1 country
Days224 to 25 April 2026
Worst day24 April9 cities counted
Furthest above usual5.5×Bihār Sharīf

Day by day

24 April 9 cities at twice their usual or more
AurangābādSasarāmRājgīrRourkelaArrahBuxarPatnaHājīpurJodaBhelaiSiwānRairangpurBegusaraiKeonjhargarhSamāstipurMuzaffarpurMungerĀsansolRānīganjMothīhāriPrayagrajBettiahDurgapurBhāgalpurBaripādaSaharsaByasanagarSatnaMaiharRaipurCuttackKatiharPurniaBhilaiDurgArāriaShrīrāmpurHaldiaKolkataKishanganjJabalpurLucknowKanpurSiliguriGayaBilāspurBelpaharAngulVaranasiBarbilSingrauliDera Colliery TownshipGorakhpurJhariaChāpraBihār Sharīf
21 Apr22232425262728
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

GorakhpurGorakhpur, 21 April: 88.3 µg/m³, 2.0× usualGorakhpur, 22 April: 78.4 µg/m³, 1.7× usualGorakhpur, 23 April: 55.9 µg/m³, 1.2× usualGorakhpur, 24 April: 117.0 µg/m³, 2.6× usualGorakhpur, 25 April: 78.6 µg/m³, 1.8× usualGorakhpur, 26 April: 36.7 µg/m³, 0.8× usualGorakhpur, 27 April: 63.6 µg/m³, 1.4× usualGorakhpur, 28 April: 33.1 µg/m³, 0.7× usualBarbilBarbil, 21 April: 52.3 µg/m³, 1.5× usualBarbil, 22 April: 69.6 µg/m³, 2.0× usualBarbil, 23 April: 68.4 µg/m³, 2.0× usualBarbil, 24 April: 78.7 µg/m³, 2.3× usualBarbil, 25 April: 76.9 µg/m³, 2.2× usualBarbil, 26 April: 61.2 µg/m³, 1.8× usualBarbil, 27 April: 50.3 µg/m³, 1.5× usualBarbil, 28 April: 44.3 µg/m³, 1.3× usualDera Colliery Towns…Dera Colliery Township, 21 April: 49.1 µg/m³, 1.4× usualDera Colliery Township, 22 April: 58.6 µg/m³, 1.7× usualDera Colliery Township, 23 April: 83.6 µg/m³, 2.4× usualDera Colliery Township, 24 April: 81.4 µg/m³, 2.4× usualDera Colliery Township, 25 April: 33.4 µg/m³, 1.0× usualDera Colliery Township, 26 April: 57.3 µg/m³, 1.7× usualDera Colliery Township, 27 April: 32.1 µg/m³, 0.9× usualDera Colliery Township, 28 April: 39.0 µg/m³, 1.1× usualBelpaharBelpahar, 21 April: 50.0 µg/m³, 1.6× usualBelpahar, 22 April: 22.3 µg/m³, 0.7× usualBelpahar, 23 April: 61.3 µg/m³, 2.0× usualBelpahar, 24 April: 64.8 µg/m³, 2.1× usualBelpahar, 25 April: 51.3 µg/m³, 1.7× usualBelpahar, 26 April: 55.4 µg/m³, 1.8× usualBelpahar, 27 April: 27.0 µg/m³, 0.9× usualBelpahar, 28 April: 26.6 µg/m³, 0.9× usualChāpraChāpra, 21 April: no readingChāpra, 22 April: 52.2 µg/m³, 1.7× usualChāpra, 23 April: 56.0 µg/m³, 1.8× usualChāpra, 24 April: 141.0 µg/m³, 4.6× usualChāpra, 25 April: no readingChāpra, 26 April: no readingChāpra, 27 April: 53.0 µg/m³, 1.7× usualChāpra, 28 April: 81.9 µg/m³, 2.7× usualBihār SharīfBihār Sharīf, 21 April: 31.4 µg/m³, 1.5× usualBihār Sharīf, 22 April: no readingBihār Sharīf, 23 April: 41.7 µg/m³, 1.9× usualBihār Sharīf, 24 April: 119.0 µg/m³, 5.5× usualBihār Sharīf, 25 April: 75.1 µg/m³, 3.5× usualBihār Sharīf, 26 April: 23.8 µg/m³, 1.1× usualBihār Sharīf, 27 April: no readingBihār Sharīf, 28 April: 24.1 µg/m³, 1.1× usualJhariaJharia, 21 April: 31.6 µg/m³, 1.0× usualJharia, 22 April: 50.8 µg/m³, 1.6× usualJharia, 23 April: 54.7 µg/m³, 1.7× usualJharia, 24 April: 92.3 µg/m³, 2.9× usualJharia, 25 April: 41.5 µg/m³, 1.3× usualJharia, 26 April: 38.5 µg/m³, 1.2× usualJharia, 27 April: 44.9 µg/m³, 1.4× usualJharia, 28 April: 41.0 µg/m³, 1.3× usualAngulAngul, 21 April: 46.1 µg/m³, 1.1× usualAngul, 22 April: 57.6 µg/m³, 1.4× usualAngul, 23 April: 76.4 µg/m³, 1.8× usualAngul, 24 April: 88.6 µg/m³, 2.1× usualAngul, 25 April: 30.8 µg/m³, 0.7× usualAngul, 26 April: 23.8 µg/m³, 0.6× usualAngul, 27 April: 43.7 µg/m³, 1.0× usualAngul, 28 April: 39.1 µg/m³, 0.9× usualGayaGaya, 21 April: 47.9 µg/m³, 1.4× usualGaya, 22 April: 45.2 µg/m³, 1.3× usualGaya, 23 April: 60.8 µg/m³, 1.8× usualGaya, 24 April: 70.1 µg/m³, 2.0× usualGaya, 25 April: 38.3 µg/m³, 1.1× usualGaya, 26 April: 38.4 µg/m³, 1.1× usualGaya, 27 April: 33.0 µg/m³, 1.0× usualGaya, 28 April: 30.3 µg/m³, 0.9× usualSingrauliSingrauli, 21 April: 50.1 µg/m³, 0.8× usualSingrauli, 22 April: 92.5 µg/m³, 1.5× usualSingrauli, 23 April: 110.0 µg/m³, 1.8× usualSingrauli, 24 April: 122.0 µg/m³, 2.0× usualSingrauli, 25 April: 145.0 µg/m³, 2.4× usualSingrauli, 26 April: 135.0 µg/m³, 2.2× usualSingrauli, 27 April: no readingSingrauli, 28 April: 44.1 µg/m³, 0.7× usualBilāspurBilāspur, 21 April: 48.4 µg/m³, 1.3× usualBilāspur, 22 April: 48.7 µg/m³, 1.3× usualBilāspur, 23 April: 54.2 µg/m³, 1.5× usualBilāspur, 24 April: 62.3 µg/m³, 1.7× usualBilāspur, 25 April: 78.0 µg/m³, 2.1× usualBilāspur, 26 April: 69.7 µg/m³, 1.9× usualBilāspur, 27 April: 52.5 µg/m³, 1.4× usualBilāspur, 28 April: no readingVaranasiVaranasi, 21 April: 36.4 µg/m³, 1.5× usualVaranasi, 22 April: 39.9 µg/m³, 1.7× usualVaranasi, 23 April: 36.4 µg/m³, 1.5× usualVaranasi, 24 April: 45.4 µg/m³, 1.9× usualVaranasi, 25 April: 52.8 µg/m³, 2.2× usualVaranasi, 26 April: 55.1 µg/m³, 2.3× usualVaranasi, 27 April: 32.7 µg/m³, 1.4× usualVaranasi, 28 April: 26.7 µg/m³, 1.1× usual21 Apr22232425262728
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.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
Bihār SharīfBihar, India2 119.024 April21.65.5×
ChāpraBihar, India1 141.024 April30.54.6×
JhariaJharkhand, India1 92.324 April31.52.9×
GorakhpurUttar Pradesh, India1 117.024 April44.92.6×
Dera Colliery TownshipOdisha, India1 83.623 April34.22.4×
SingrauliMadhya Pradesh, India1 145.025 April61.22.4×
VaranasiUttar Pradesh, India1 55.126 April23.82.3×
BarbilOdisha, India2 78.724 April34.42.3×
BelpaharOdisha, India1 64.824 April30.42.1×
BilāspurChhattisgarh, India1 78.025 April37.12.1×
AngulOdisha, India1 88.624 April42.22.1×
GayaBihar, India1 70.124 April34.32.0×

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 27 of 54 episodes in India since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 54.

Use this page

SmogRank, North-eastern India, April 2026: 12 cities with PM2.5 at twice their usual or more, 24 to 25 April 2026, smogrank.com/episodes/2026-04-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.