Worst air pollution Shikokuchūō, today and tomorrow
Today (21 September): Air quality in Shikokuchūō is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 PM (PM2.5: 18.4/100).
Tomorrow (22 September 2026): Air quality in Shikokuchūō is fair. AQI worsens to fair; PM2.5 increases to fair; PM10 increases to fair; NO2 increases to fair; O3 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 7:00 PM (NO2: 25.5/100). 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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Shikokuchūō's air quality reflects the Ehime Prefecture Seto Inland Sea coastal position at the Shikoku-Honshu corridor, with vehicle traffic on surrounding roads and the paper and pulp manufacturing — Shikokucho being Japan's paper production heartland — generating elevated industrial PM2.5 and distinctive organic aerosols. Consistent Seto Inland Sea maritime breezes provide coastal ventilation, while the paper manufacturing operations' distinctive organic emission profile represents Shikokucho's most locally unique industrial air quality characteristic throughout the year.
Today - 21 September | Pollution peaks at 19:00
AQI:
Good
18.4/100
PM2.5 (fine particles):
Good
18.4/100
PM10 (coarse particles):
Good
14.3/100
NO2 (nitrogen dioxide):
Good
18.3/100
O3 (ozone):
Good
15.6/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.8/100
HCHO (formaldehyde):
Good
3.7/100
PM1 (ultrafine particles):
Good
15.9/100
Levels show the poorest local air quality during the day
Tomorrow - 22 September | Pollution peaks at 19:00
AQI:
Fair
25.5/100
PM2.5 (fine particles):
Fair
25.1/100
PM10 (coarse particles):
Fair
20.8/100
NO2 (nitrogen dioxide):
Fair
25.5/100
O3 (ozone):
Fair
20.1/100
SO2 (sulfur dioxide):
Good
3.7/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Fair
21.0/100
Frequently Asked Questions
Is air quality bad in Shikokuchūō right now?
On 21 September 2026, overall air quality in Shikokuchūō is good. AQI is the main air quality indicator at 18.4/100. Pollution peaks around 7:00 PM (PM2.5: 18.4/100).
Will air quality be worse tomorrow in Shikokuchūō?
On 22 September 2026, air quality conditions in Shikokuchūō will be worse than today, with AQI forecast at fair at 25.5/100. Pollution peaks around 7:00 PM (NO2: 25.5/100).
When is air pollution at its worst in Shikokuchūō?
Pollution in Shikokuchūō typically rises when vehicle traffic and manufacturing activity combine, especially once dry spells bring strong winds. These wind events can carry dust in from the surrounding arid landscape. Maritime airflow normally ventilates the area well, though calmer spells let levels rise.
Are air quality levels in Shikokuchūō 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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