Worst air pollution Saiki, today and tomorrow
Today (16 July): Air quality in Saiki is poor. AQI and O3 are poor; NO2 and PM1 are fair; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 10:00 PM (O3: 75.7/100).
Tomorrow (17 July 2026): Air quality in Saiki is poor. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 71.9/100). 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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Saiki's air quality benefits from its exceptional Oita Prefecture Hyuga Sea and Pacific Ocean coastal position, with consistent Pacific and Bungo Channel maritime breezes providing reliable ventilation. Vehicle traffic on surrounding roads and the timber, fishing, and manufacturing corridor contribute local sources, while the outstanding coastal exposure and the surrounding Sobo-Katamuki mountain backdrop create topographic variation and Saiki generally maintains good to moderate conditions for a Japanese Pacific coastal city.
Today - 16 July | Pollution peaks at 22:00
AQI:
Poor
75.7/100
PM2.5 (fine particles):
Good
18.6/100
PM10 (coarse particles):
Good
7.0/100
NO2 (nitrogen dioxide):
Fair
24.7/100
O3 (ozone):
Poor
75.7/100
SO2 (sulfur dioxide):
Good
10.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Fair
21.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Poor
71.9/100
PM2.5 (fine particles):
Fair
25.0/100
PM10 (coarse particles):
Good
7.4/100
NO2 (nitrogen dioxide):
Fair
38.4/100
O3 (ozone):
Poor
71.9/100
SO2 (sulfur dioxide):
Good
16.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
15.0/100
PM1 (ultrafine particles):
Fair
28.8/100
Frequently Asked Questions
Is air quality bad in Saiki right now?
On 16 July 2026, overall air quality in Saiki is poor. AQI is the main air quality indicator at 75.7/100. Pollution peaks around 10:00 PM (O3: 75.7/100).
Will air quality be worse tomorrow in Saiki?
On 17 July 2026, air quality conditions in Saiki will be similar to today, with AQI forecast at poor at 71.9/100. Pollution peaks around 2:00 PM (O3: 71.9/100).
When is air pollution at its worst in Saiki?
Saiki usually sees its poorest air quality when road traffic, textile and manufacturing operations, and port and shipping activity coincide with periods when onshore breezes fall calm. Maritime airflow normally ventilates the area well, though calmer spells let levels rise. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Saiki 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app