Worst air pollution Supaul, today and tomorrow
Today (16 July): Air quality in Supaul is fair. PM2.5 and NO2 are fair; AQI, O3, and PM1 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 1:30 PM (O3: 49.0/100).
Tomorrow (17 July 2026): Air quality in Supaul is fair. AQI worsens to fair; O3 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 3:30 PM (O3: 38.1/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Supaul's air quality reflects the flat Bihar Kosi River floodplain's position near Nepal, with vehicle traffic on surrounding roads and agricultural operations contributing local sources. The dry winter northeast monsoon concentrates emissions, while the flat alluvial plain's minimal topographic dispersal and the Bihar regional background maintain elevated winter readings and the Kosi River's frequent flooding influences the seasonal air quality environment throughout the year.
Today - 16 July | Pollution peaks at 13:30
AQI:
Medium
49.0/100
PM2.5 (fine particles):
Fair
34.3/100
PM10 (coarse particles):
Good
9.6/100
NO2 (nitrogen dioxide):
Fair
32.6/100
O3 (ozone):
Medium
49.0/100
SO2 (sulfur dioxide):
Good
13.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.8/100
PM1 (ultrafine particles):
Medium
40.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:30
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Fair
28.3/100
PM10 (coarse particles):
Good
8.0/100
NO2 (nitrogen dioxide):
Fair
26.9/100
O3 (ozone):
Fair
38.1/100
SO2 (sulfur dioxide):
Good
11.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.8/100
PM1 (ultrafine particles):
Fair
34.8/100
Frequently Asked Questions
Is air quality bad in Supaul right now?
On 16 July 2026, overall air quality in Supaul is fair. PM2.5 is the main pollutant at 34.3/100. Pollution peaks around 1:30 PM (O3: 49.0/100).
Will air quality be worse tomorrow in Supaul?
On 17 July 2026, air quality conditions in Supaul will be similar to today, with AQI forecast at fair at 38.1/100. Pollution peaks around 3:30 PM (O3: 38.1/100).
When is air pollution at its worst in Supaul?
Pollution in Supaul typically rises when traffic emissions and crop farming combine, especially once conditions turn dry between monsoons. The wet season generally clears the air, while the dry season lets levels build back up. Air quality typically improves markedly once the rains arrive.
Are air quality levels in Supaul based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app