Worst air pollution Ina, today and tomorrow
Today (16 July): Air quality in Ina is fair. PM1 is fair; AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 53.0/100).
Tomorrow (17 July 2026): Air quality in Ina is medium. PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 51.8/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Ina's air quality benefits from its exceptional Nagano Prefecture Ina Valley position at 660 metres between the Southern and Central Japanese Alps, with consistent mountain valley breezes providing clean natural ventilation. Vehicle traffic on surrounding roads and the electronics manufacturing, apple farming, and services corridor contribute local sources, while the outstanding alpine highland setting generally maintains Ina among Japan's more pleasantly ventilated mountain valley cities throughout most of the year.
Today - 16 July | Pollution peaks at 15:00
AQI:
Medium
53.0/100
PM2.5 (fine particles):
Good
19.8/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Good
10.5/100
O3 (ozone):
Medium
53.0/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.0/100
PM1 (ultrafine particles):
Fair
24.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Medium
51.8/100
PM2.5 (fine particles):
Good
12.5/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
9.2/100
O3 (ozone):
Medium
51.8/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.3/100
PM1 (ultrafine particles):
Good
17.4/100
Frequently Asked Questions
Is air quality bad in Ina right now?
On 16 July 2026, overall air quality in Ina is fair. PM1 is the main pollutant at 24.7/100. Pollution peaks around 3:00 PM (O3: 53.0/100).
Will air quality be worse tomorrow in Ina?
On 17 July 2026, air quality conditions in Ina will be better than today, with AQI forecast at medium at 51.8/100. Pollution peaks around 12:00 PM (O3: 51.8/100).
When is air pollution at its worst in Ina?
Pollution in Ina typically rises when traffic emissions, manufacturing and food processing, and agricultural activity combine, especially once still air allows pollutants to build up. Local weather patterns add further variation on top of these sources. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Ina 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