Worst air pollution Hashimoto, today and tomorrow
Today (10 August): Air quality in Hashimoto is poor. AQI and O3 are poor; NO2, SO2, and PM1 are fair; PM2.5, PM10, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 61.7/100).
Tomorrow (11 August 2026): Air quality in Hashimoto is fair. AQI improves to medium; O3 decreases to medium; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 45.9/100). 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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Hashimoto's air quality reflects the Wakayama Prefecture Kinokawa River valley position at the Kii Mountains base, with vehicle traffic on surrounding roads and the manufacturing, agricultural, and residential corridor contributing local sources. Consistent Pacific and Kinokawa valley breezes provide background ventilation, while the surrounding Kii Mountains create topographic variation and Hashimoto generally maintains moderate Wakayama Prefecture inland valley readings throughout most of the year.
Today - 10 August | Pollution peaks at 13:00
AQI:
Poor
61.7/100
PM2.5 (fine particles):
Good
16.1/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Fair
32.3/100
O3 (ozone):
Poor
61.7/100
SO2 (sulfur dioxide):
Fair
36.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.6/100
PM1 (ultrafine particles):
Fair
20.8/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 13:00
AQI:
Medium
45.9/100
PM2.5 (fine particles):
Good
12.3/100
PM10 (coarse particles):
Good
4.0/100
NO2 (nitrogen dioxide):
Fair
30.7/100
O3 (ozone):
Medium
45.9/100
SO2 (sulfur dioxide):
Fair
24.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.9/100
PM1 (ultrafine particles):
Good
13.8/100
Frequently Asked Questions
Is air quality bad in Hashimoto right now?
On 10 August 2026, overall air quality in Hashimoto is poor. AQI is the main air quality indicator at 61.7/100. Pollution peaks around 1:00 PM (O3: 61.7/100).
Will air quality be worse tomorrow in Hashimoto?
On 11 August 2026, air quality conditions in Hashimoto will be better than today, with NO2 forecast at fair at 30.7/100. Pollution peaks around 1:00 PM (O3: 45.9/100).
When is air pollution at its worst in Hashimoto?
Hashimoto usually sees its poorest air quality when vehicle traffic, manufacturing activity, along with agricultural activity coincide with periods when 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 Hashimoto 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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