Worst air pollution Sandachō, today and tomorrow
Today (21 September): Air quality in Sandachō is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 23.2/100).
Tomorrow (22 September 2026): Air quality in Sandachō is fair. PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 24.6/100). 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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Sandachō in Hyogo reflects the Hyogo Prefecture central corridor position adjacent to the Chugoku Mountains, with vehicle traffic on surrounding roads and the agricultural and light manufacturing character contributing local sources. Consistent Seto Inland Sea influenced breezes provide background ventilation, while the surrounding mountain topography creates variation and the area generally maintains moderate Hyogo Prefecture inland corridor readings throughout most of the year.
Today - 21 September | Pollution peaks at 23:00
AQI:
Fair
23.2/100
PM2.5 (fine particles):
Good
12.3/100
PM10 (coarse particles):
Good
11.4/100
NO2 (nitrogen dioxide):
Good
8.8/100
O3 (ozone):
Fair
23.2/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
4.9/100
PM1 (ultrafine particles):
Good
5.8/100
Levels show the poorest local air quality during the day
Tomorrow - 22 September | Pollution peaks at 13:00
AQI:
Fair
24.6/100
PM2.5 (fine particles):
Good
19.9/100
PM10 (coarse particles):
Fair
20.1/100
NO2 (nitrogen dioxide):
Good
8.5/100
O3 (ozone):
Fair
24.6/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
7.3/100
Frequently Asked Questions
Is air quality bad in Sandachō right now?
On 21 September 2026, overall air quality in Sandachō is fair. AQI is the main air quality indicator at 23.2/100. Pollution peaks around 11:00 PM (O3: 23.2/100).
Will air quality be worse tomorrow in Sandachō?
On 22 September 2026, air quality conditions in Sandachō will be similar to today, with AQI forecast at fair at 24.6/100. Pollution peaks around 1:00 PM (O3: 24.6/100).
When is air pollution at its worst in Sandachō?
In Sandachō, traffic emissions, light manufacturing, along with crop farming are the main local sources, with conditions worsening when winds are light and dispersion is poor. Background emissions and local weather both shape how conditions change from day to day. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Sandachō 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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