Worst air pollution Yao, today and tomorrow
Today (16 July): Air quality in Yao is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 71.7/100).
Tomorrow (17 July 2026): Air quality in Yao is very poor. AQI worsens to very poor; O3 increases to very poor; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 89.1/100). 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
Use our Strava plugin to check your own exposure.
Chiayi's air quality reflects the Taiwan central-western coastal plain position on the Taiwan Strait, with vehicle traffic on surrounding roads and the manufacturing, agricultural, and university corridor contributing local sources. Consistent Taiwan Strait breezes provide maritime ventilation, while transboundary Chinese industrial pollution on northwesterly winds contributes regional background and Chiayi generally maintains moderate Taiwanese central western coastal readings throughout most of the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Poor
71.7/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
9.2/100
O3 (ozone):
Poor
71.7/100
SO2 (sulfur dioxide):
Good
6.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.2/100
PM1 (ultrafine particles):
Good
15.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Very poor
89.1/100
PM2.5 (fine particles):
Good
19.0/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Good
12.3/100
O3 (ozone):
Very poor
89.1/100
SO2 (sulfur dioxide):
Good
9.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.4/100
PM1 (ultrafine particles):
Fair
24.4/100
Frequently Asked Questions
Is air quality bad in Yao right now?
On 16 July 2026, overall air quality in Yao is poor. AQI is the main air quality indicator at 71.7/100. Pollution peaks around 2:00 PM (O3: 71.7/100).
Will air quality be worse tomorrow in Yao?
On 17 July 2026, air quality conditions in Yao will be worse than today, with AQI forecast at very poor at 89.1/100. Pollution peaks around 4:00 PM (O3: 89.1/100).
When is air pollution at its worst in Yao?
Pollution in Yao typically rises when vehicle traffic, textile and manufacturing operations, and crop farming combine, especially once dry spells bring strong winds. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Yao 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.
Check air quality in other popular cities:
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