Worst air pollution Mihara, today and tomorrow
Today (10 August): Air quality in Mihara is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 33.0/100).
Tomorrow (11 August 2026): Air quality in Mihara is fair. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 38.3/100). 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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Mihara's air quality reflects the Hiroshima Prefecture Seto Inland Sea coastal position adjacent to the Nippon Steel Mihara Works, with vehicle traffic on surrounding roads and the steel, chemical, and manufacturing corridor generating elevated industrial PM2.5. Consistent Seto Inland Sea maritime breezes provide coastal ventilation, while the steel complex's industrial scale represents Mihara's most distinctive local air quality contribution and the coastal position generally maintains moderate readings outside direct industrial plume events.
Today - 10 August | Pollution peaks at 15:00
AQI:
Fair
33.0/100
PM2.5 (fine particles):
Good
9.5/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
30.8/100
O3 (ozone):
Fair
33.0/100
SO2 (sulfur dioxide):
Good
10.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.5/100
PM1 (ultrafine particles):
Good
8.4/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 15:00
AQI:
Fair
38.3/100
PM2.5 (fine particles):
Good
11.6/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Good
19.8/100
O3 (ozone):
Fair
38.3/100
SO2 (sulfur dioxide):
Good
8.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
7.7/100
Frequently Asked Questions
Is air quality bad in Mihara right now?
On 10 August 2026, overall air quality in Mihara is fair. AQI is the main air quality indicator at 33.0/100. Pollution peaks around 3:00 PM (O3: 33.0/100).
Will air quality be worse tomorrow in Mihara?
On 11 August 2026, air quality conditions in Mihara will be similar to today, with AQI forecast at fair at 38.3/100. Pollution peaks around 3:00 PM (O3: 38.3/100).
When is air pollution at its worst in Mihara?
Air quality in Mihara tends to be worse when road traffic, heavy industry such as steel, cement, or petrochemical processing, and light manufacturing build up and dry spells bring strong winds. These wind events can carry dust in from the surrounding arid landscape. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Mihara 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: 9 August 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.
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