Worst air pollution Nihonmatsu, today and tomorrow
Today (10 August): Air quality in Nihonmatsu is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 21.2/100).
Tomorrow (11 August 2026): Air quality in Nihonmatsu is good. AQI improves to good; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 8:00 AM (O3: 18.9/100). 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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Nihonmatsu's air quality reflects the Fukushima Prefecture Abukuma River valley position at 280 metres, with vehicle traffic on surrounding roads and the chrysanthemum festival, lantern festival, manufacturing, and agricultural corridor contributing local sources. Pacific coastal breezes provide background ventilation, while the 2011 Fukushima Daiichi nuclear disaster's radiological legacy adds unique environmental context and Nihonmatsu generally maintains moderate Fukushima central corridor readings throughout most of the year.
Today - 10 August | Pollution peaks at 11:00
AQI:
Fair
21.2/100
PM2.5 (fine particles):
Good
5.1/100
PM10 (coarse particles):
Good
1.4/100
NO2 (nitrogen dioxide):
Good
8.0/100
O3 (ozone):
Fair
21.2/100
SO2 (sulfur dioxide):
Good
4.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
6.7/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 08:00
AQI:
Good
18.9/100
PM2.5 (fine particles):
Good
2.8/100
PM10 (coarse particles):
Good
1.0/100
NO2 (nitrogen dioxide):
Good
7.7/100
O3 (ozone):
Good
18.9/100
SO2 (sulfur dioxide):
Good
3.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.6/100
PM1 (ultrafine particles):
Good
3.1/100
Frequently Asked Questions
Is air quality bad in Nihonmatsu right now?
On 10 August 2026, overall air quality in Nihonmatsu is fair. AQI is the main air quality indicator at 21.2/100. Pollution peaks around 11:00 AM (O3: 21.2/100).
Will air quality be worse tomorrow in Nihonmatsu?
On 11 August 2026, air quality conditions in Nihonmatsu will be better than today, with AQI forecast at good at 18.9/100. Pollution peaks around 8:00 AM (O3: 18.9/100).
When is air pollution at its worst in Nihonmatsu?
Air quality in Nihonmatsu tends to be worse when traffic emissions, manufacturing and food processing, and agricultural activity build up and the sea breeze weakens. Sea breezes typically keep conditions in check, except during still weather. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Nihonmatsu 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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