Worst air pollution Guwāhāti, today and tomorrow
Today (22 September): Air quality in Guwāhāti is moderate. AQI, PM2.5, and PM1 are moderate; PM10, NO2, and HCHO are fair; O3, SO2, and CO are good. Pollution peaks around 6:30 AM (PM1: 44.8/100).
Tomorrow (23 September 2026): Air quality in Guwāhāti is moderate. PM2.5 decreases to fair; PM10 decreases to good; HCHO decreases to good; all other pollutants stay as today. Pollution peaks around 8:30 PM (PM1: 43.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Guwāhāti's air quality reflects the Brahmaputra River valley's flat alluvial plain at 55 metres surrounded by the Assam Hills and the Meghalaya Plateau, with vehicle traffic on surrounding roads and the oil refinery, tea, and construction corridor contributing local sources. The monsoon provides effective wet season cleansing, while the dry winter northeast monsoon and biomass burning from surrounding northeastern Indian forests generate seasonal PM2.5 elevation and the valley's topographic enclosure creates concentration under calm winter conditions throughout the year.
Today - 22 September | Pollution peaks at 06:30
AQI:
Moderate
44.8/100
PM2.5 (fine particles):
Moderate
40.5/100
PM10 (coarse particles):
Fair
21.2/100
NO2 (nitrogen dioxide):
Fair
22.8/100
O3 (ozone):
Good
14.0/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
1.7/100
HCHO (formaldehyde):
Fair
21.7/100
PM1 (ultrafine particles):
Moderate
44.8/100
Levels show the poorest local air quality during the day
Tomorrow - 23 September | Pollution peaks at 20:30
AQI:
Moderate
43.0/100
PM2.5 (fine particles):
Fair
35.3/100
PM10 (coarse particles):
Good
19.4/100
NO2 (nitrogen dioxide):
Fair
35.6/100
O3 (ozone):
Good
9.4/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
1.6/100
HCHO (formaldehyde):
Good
13.9/100
PM1 (ultrafine particles):
Moderate
43.0/100
Frequently Asked Questions
Is air quality bad in Guwāhāti right now?
On 22 September 2026, overall air quality in Guwāhāti is moderate. AQI is the main air quality indicator at 44.8/100. Pollution peaks around 6:30 AM (PM1: 44.8/100).
Will air quality be worse tomorrow in Guwāhāti?
On 23 September 2026, air quality conditions in Guwāhāti will be similar to today, with AQI forecast at moderate at 43.0/100. Pollution peaks around 8:30 PM (PM1: 43.0/100).
When is air pollution at its worst in Guwāhāti?
Guwāhāti usually sees its poorest air quality when vehicle traffic, heavy industrial and chemical processing, as well as construction activity coincide with periods when the monsoon rains ease off. Rainfall through the monsoon usually keeps levels in check. The driest months of the year tend to see the highest readings.
Are air quality levels in Guwāhāti 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 22 September 2026 at 20:32 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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