Worst air pollution Hyūga, today and tomorrow
Today (10 August): Air quality in Hyūga is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 14.6/100).
Tomorrow (11 August 2026): Air quality in Hyūga is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 39.1/100). 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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Hyūga's air quality benefits from its exceptional Miyazaki Prefecture Pacific Ocean coastal position, with consistent Pacific maritime breezes providing reliable ventilation along this pristine Hyuga Sea coast. Vehicle traffic on surrounding roads and the paper manufacturing, fishing, and services corridor contribute local sources, while the outstanding Pacific coastal exposure and the dramatic Miyazaki highland backdrop generally maintain Hyuga at moderate to good conditions for a major Japanese Pacific coastal city.
Today - 10 August | Pollution peaks at 16:00
AQI:
Good
14.6/100
PM2.5 (fine particles):
Good
5.6/100
PM10 (coarse particles):
Good
2.3/100
NO2 (nitrogen dioxide):
Good
8.7/100
O3 (ozone):
Good
14.6/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.0/100
PM1 (ultrafine particles):
Good
5.2/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 14:00
AQI:
Fair
39.1/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
11.0/100
O3 (ozone):
Fair
39.1/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.0/100
PM1 (ultrafine particles):
Good
9.9/100
Frequently Asked Questions
Is air quality bad in Hyūga right now?
On 10 August 2026, overall air quality in Hyūga is good. AQI is the main air quality indicator at 14.6/100. Pollution peaks around 4:00 PM (O3: 14.6/100).
Will air quality be worse tomorrow in Hyūga?
On 11 August 2026, air quality conditions in Hyūga will be worse than today, with AQI forecast at fair at 39.1/100. Pollution peaks around 2:00 PM (O3: 39.1/100).
When is air pollution at its worst in Hyūga?
Air quality in Hyūga tends to be worse when vehicle traffic, textile and manufacturing operations, as well as shipbuilding and port operations build up and the sea breeze weakens. Maritime airflow normally ventilates the area well, though calmer spells let levels rise. This natural ventilation is one reason coastal areas often see better readings than inland cities.
Are air quality levels in Hyūga 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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