Worst air pollution Moriyama, today and tomorrow
Today (16 July): Air quality in Moriyama is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 56.1/100).
Tomorrow (17 July 2026): Air quality in Moriyama is medium. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 45.5/100). 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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Moriyama's air quality benefits from its exceptional Shiga Prefecture Lake Biwa southern shoreline position, with consistent Lake Biwa breezes providing reliable natural ventilation. Vehicle traffic on surrounding roads and the manufacturing, services, and residential corridor contribute local sources, while the outstanding lake ventilation and the surrounding Shiga mountain backdrop create topographic variation and Moriyama generally maintains good to moderate conditions for a Japanese Shiga Prefecture lakeside city throughout most of the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
56.1/100
PM2.5 (fine particles):
Good
16.1/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Fair
23.5/100
O3 (ozone):
Medium
56.1/100
SO2 (sulfur dioxide):
Good
17.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.9/100
PM1 (ultrafine particles):
Good
19.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
45.5/100
PM2.5 (fine particles):
Good
16.1/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Good
16.6/100
O3 (ozone):
Medium
45.5/100
SO2 (sulfur dioxide):
Good
3.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
19.4/100
Frequently Asked Questions
Is air quality bad in Moriyama right now?
On 16 July 2026, overall air quality in Moriyama is fair. NO2 is the main pollutant at 23.5/100. Pollution peaks around 12:00 PM (O3: 56.1/100).
Will air quality be worse tomorrow in Moriyama?
On 17 July 2026, air quality conditions in Moriyama will be better than today, with AQI forecast at medium at 45.5/100. Pollution peaks around 4:00 PM (O3: 45.5/100).
When is air pollution at its worst in Moriyama?
Moriyama usually sees its poorest air quality when road traffic and light manufacturing coincide with periods when weather conditions turn unfavourable. Day-to-day conditions here depend heavily on the weather. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Moriyama 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