Worst air pollution Yoshiichō-shimobaru, today and tomorrow
Today (10 August): Air quality in Yoshiichō-shimobaru is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 34.6/100).
Tomorrow (11 August 2026): Air quality in Yoshiichō-shimobaru is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 43.7/100). 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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Yoshiichō-shimobaru in Nagasaki reflects the Nagasaki Peninsula's coastal position on the East China Sea, with vehicle traffic on surrounding roads and the shipbuilding and residential character contributing local sources. Consistent East China Sea maritime breezes provide reliable ventilation, while the dramatic hillside topography creates distinctive local wind patterns and the area generally maintains moderate Nagasaki metropolitan coastal readings throughout most of the year.
Today - 10 August | Pollution peaks at 16:00
AQI:
Fair
34.6/100
PM2.5 (fine particles):
Good
9.1/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
17.4/100
O3 (ozone):
Fair
34.6/100
SO2 (sulfur dioxide):
Good
5.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Good
8.7/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 12:00
AQI:
Medium
43.7/100
PM2.5 (fine particles):
Good
12.2/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Good
14.1/100
O3 (ozone):
Medium
43.7/100
SO2 (sulfur dioxide):
Good
7.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.1/100
PM1 (ultrafine particles):
Good
7.3/100
Frequently Asked Questions
Is air quality bad in Yoshiichō-shimobaru right now?
On 10 August 2026, overall air quality in Yoshiichō-shimobaru is fair. AQI is the main air quality indicator at 34.6/100. Pollution peaks around 4:00 PM (O3: 34.6/100).
Will air quality be worse tomorrow in Yoshiichō-shimobaru?
On 11 August 2026, air quality conditions in Yoshiichō-shimobaru will be better than today, with AQI forecast at medium at 43.7/100. Pollution peaks around 12:00 PM (O3: 43.7/100).
When is air pollution at its worst in Yoshiichō-shimobaru?
Air quality in Yoshiichō-shimobaru tends to be worse when road traffic and shipbuilding and port operations build up and the sea breeze weakens. Onshore breezes usually help clear the air, but pollution can build up when winds are light. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Yoshiichō-shimobaru 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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