Worst air pollution Sado, today and tomorrow
Today (18 August): Air quality in Sado is poor. AQI and O3 are poor; PM2.5, NO2, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 78.2/100).
Tomorrow (19 August 2026): Air quality in Sado is very poor. AQI worsens to very poor; NO2 decreases to good; O3 increases to very poor; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 90.4/100). 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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Sado's air quality benefits from its exceptional Niigata Prefecture Sea of Japan island position — Japan's largest island after Hokkaido and Okinawa — with consistent Sea of Japan maritime breezes providing outstanding maritime ventilation. Vehicle traffic on surrounding roads and the gold mine heritage, tarai bune boat fishing, and Kodo drumming tourism corridor contribute modest local sources, while the extraordinary island coastal exposure generally maintains Sado among Japan's cleaner inhabited island environments throughout most of the year.
Today - 18 August | Pollution peaks at 15:00
AQI:
Poor
78.2/100
PM2.5 (fine particles):
Fair
22.1/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Fair
20.3/100
O3 (ozone):
Poor
78.2/100
SO2 (sulfur dioxide):
Good
16.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.7/100
PM1 (ultrafine particles):
Fair
27.8/100
Levels show the poorest local air quality during the day
Tomorrow - 19 August | Pollution peaks at 14:00
AQI:
Very poor
90.4/100
PM2.5 (fine particles):
Fair
26.8/100
PM10 (coarse particles):
Good
7.4/100
NO2 (nitrogen dioxide):
Good
13.8/100
O3 (ozone):
Very poor
90.4/100
SO2 (sulfur dioxide):
Good
14.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Fair
33.4/100
Frequently Asked Questions
Is air quality bad in Sado right now?
On 18 August 2026, overall air quality in Sado is poor. AQI is the main air quality indicator at 78.2/100. Pollution peaks around 3:00 PM (O3: 78.2/100).
Will air quality be worse tomorrow in Sado?
On 19 August 2026, air quality conditions in Sado will be worse than today, with AQI forecast at very poor at 90.4/100. Pollution peaks around 2:00 PM (O3: 90.4/100).
When is air pollution at its worst in Sado?
In Sado, traffic on the surrounding roads, harbour and shipping traffic, and seasonal tourism traffic are the main local sources, with conditions worsening when maritime winds die down. 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 Sado 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: 17 August 2026 at 20:32 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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