Worst air pollution Iwamizawa, today and tomorrow
Today (21 September): Air quality in Iwamizawa is moderate. AQI and PM1 are moderate; PM2.5 is fair; PM10, NO2, O3, SO2, CO, and HCHO are good. Pollution peaks around 7:00 AM (PM1: 41.9/100).
Tomorrow (22 September 2026): Air quality in Iwamizawa is good. AQI improves to good; PM2.5 decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 15.4/100). 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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Iwamizawa's air quality reflects the Hokkaido central Sorachi River plain position adjacent to Sapporo, with vehicle traffic on surrounding roads and the coal mining legacy, rice farming, and residential character contributing local sources. The flat Ishikari Plain allows reasonable dispersal, while the broader Sapporo metropolitan regional background and the clean Hokkaido boreal setting generally maintain Iwamizawa at moderate conditions throughout most of the year.
Today - 21 September | Pollution peaks at 07:00
AQI:
Moderate
41.9/100
PM2.5 (fine particles):
Fair
30.5/100
PM10 (coarse particles):
Good
18.5/100
NO2 (nitrogen dioxide):
Good
9.5/100
O3 (ozone):
Good
16.7/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
8.7/100
PM1 (ultrafine particles):
Moderate
41.9/100
Levels show the poorest local air quality during the day
Tomorrow - 22 September | Pollution peaks at 12:00
AQI:
Good
15.4/100
PM2.5 (fine particles):
Good
10.9/100
PM10 (coarse particles):
Good
7.5/100
NO2 (nitrogen dioxide):
Good
7.5/100
O3 (ozone):
Good
15.4/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
13.3/100
Frequently Asked Questions
Is air quality bad in Iwamizawa right now?
On 21 September 2026, overall air quality in Iwamizawa is moderate. AQI is the main air quality indicator at 41.9/100. Pollution peaks around 7:00 AM (PM1: 41.9/100).
Will air quality be worse tomorrow in Iwamizawa?
On 22 September 2026, air quality conditions in Iwamizawa will be better than today, with AQI forecast at good at 15.4/100. Pollution peaks around 12:00 PM (O3: 15.4/100).
When is air pollution at its worst in Iwamizawa?
The biggest local contributors to pollution in Iwamizawa are traffic emissions, mining operations, as well as agricultural activity, particularly once the colder winter months arrive. Residential heating through the colder months is a major seasonal source of particulates. This is far less of a factor once the heating season ends.
Are air quality levels in Iwamizawa 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 02:59 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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