Worst air pollution Grajewo, today and tomorrow
Today (20 September): Air quality in Grajewo is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (NO2: 21.1/100).
Tomorrow (21 September 2026): Air quality in Grajewo is good. AQI improves to good; NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 AM (O3: 11.4/100). 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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Grajewo sits close to the Ełk River, and this shapes local air quality, with farmland of the Biebrza river basin adding to seasonal pressure from heavy goods traffic on the nearby motorway corridor. Seasonal variation is notable, with cleaner air typically following stronger winds or rainfall.
Today - 20 September | Pollution peaks at 13:00
AQI:
Fair
21.1/100
PM2.5 (fine particles):
Good
17.6/100
PM10 (coarse particles):
Good
10.9/100
NO2 (nitrogen dioxide):
Fair
21.1/100
O3 (ozone):
Good
12.0/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
19.9/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 00:00
AQI:
Good
11.4/100
PM2.5 (fine particles):
Good
5.4/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Good
11.1/100
O3 (ozone):
Good
11.4/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
9.4/100
Pollen forecast in Grajewo
View pollen forecastFrequently Asked Questions
Is air quality bad in Grajewo right now?
On 20 September 2026, overall air quality in Grajewo is fair. AQI is the main air quality indicator at 21.1/100. Pollution peaks around 1:00 PM (NO2: 21.1/100).
Will air quality be worse tomorrow in Grajewo?
On 21 September 2026, air quality conditions in Grajewo will be better than today, with AQI forecast at good at 11.4/100. Pollution peaks around 12:00 AM (O3: 11.4/100).
When is air pollution at its worst in Grajewo?
Residents of Grajewo are quickest to notice reduced air quality when pine and birch pollen peaks or in periods marked by farmland of the Biebrza river basin; the clearest air tends to follow a change in wind direction or a spell of rainfall through the region.
Are air quality levels in Grajewo 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: 20 September 2026 at 20:27 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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