Worst air pollution Shiogama, today and tomorrow
Today (16 July): Air quality in Shiogama is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 53.5/100).
Tomorrow (17 July 2026): Air quality in Shiogama is good. AQI improves to good; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 16.7/100). 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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Shiogama's air quality reflects the Miyagi Prefecture Shiogama Bay and Matsushima Bay coastal position adjacent to Sendai, with vehicle traffic on surrounding roads and the fishing, soy sauce brewing, and port corridor contributing local sources. Consistent Pacific maritime breezes provide coastal ventilation, while the 2011 Tōhoku tsunami's extraordinary impact on this historic fishing port adds distinctive coastal reconstruction environmental context and Shiogama generally maintains moderate Miyagi coastal readings throughout most of the year.
Today - 16 July | Pollution peaks at 11:00
AQI:
Medium
53.5/100
PM2.5 (fine particles):
Good
11.8/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
5.2/100
O3 (ozone):
Medium
53.5/100
SO2 (sulfur dioxide):
Good
5.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.1/100
PM1 (ultrafine particles):
Good
16.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Good
16.7/100
PM2.5 (fine particles):
Good
5.1/100
PM10 (coarse particles):
Good
2.0/100
NO2 (nitrogen dioxide):
Good
4.7/100
O3 (ozone):
Good
16.7/100
SO2 (sulfur dioxide):
Good
3.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.3/100
PM1 (ultrafine particles):
Good
4.4/100
Frequently Asked Questions
Is air quality bad in Shiogama right now?
On 16 July 2026, overall air quality in Shiogama is medium. AQI is the main air quality indicator at 53.5/100. Pollution peaks around 11:00 AM (O3: 53.5/100).
Will air quality be worse tomorrow in Shiogama?
On 17 July 2026, air quality conditions in Shiogama will be better than today, with AQI forecast at good at 16.7/100. Pollution peaks around 2:00 PM (O3: 16.7/100).
When is air pollution at its worst in Shiogama?
Air quality in Shiogama tends to be worse when road traffic, construction activity, and fishing fleet activity build up and 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 Shiogama 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