Worst air pollution Chilliwack, today and tomorrow
Today (15 July): Air quality in Chilliwack is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 36.0/100).
Tomorrow (16 July 2026): Air quality in Chilliwack is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 6:00 AM (O3: 51.1/100). 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
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Chilliwack's air quality is affected by the narrowing Fraser Valley trapping pollutants against Coast Mountain slopes, with agricultural operations and Highway 1 traffic as local sources during summer inversions.
Today - 15 July | Pollution peaks at 09:00
AQI:
Fair
36.0/100
PM2.5 (fine particles):
Good
5.8/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Good
1.2/100
O3 (ozone):
Fair
36.0/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Good
5.3/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 06:00
AQI:
Medium
51.1/100
PM2.5 (fine particles):
Good
6.2/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Good
1.1/100
O3 (ozone):
Medium
51.1/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.9/100
PM1 (ultrafine particles):
Good
6.1/100
Pollen forecast in Chilliwack
View pollen forecastFrequently Asked Questions
Is air quality bad in Chilliwack right now?
On 15 July 2026, overall air quality in Chilliwack is fair. AQI is the main air quality indicator at 36.0/100. Pollution peaks around 9:00 AM (O3: 36.0/100).
Will air quality be worse tomorrow in Chilliwack?
On 16 July 2026, air quality conditions in Chilliwack will be better than today, with AQI forecast at medium at 51.1/100. Pollution peaks around 6:00 AM (O3: 51.1/100).
When is air pollution at its worst in Chilliwack?
Air quality in Chilliwack changes through the year largely because of farmland of the eastern Fraser Valley, hemmed in by mountains. Mild, wet winters keep the air clean, while hot summer days can trap drifting city traffic and farm dust against the valley's mountain walls. Local dairy and berry farming add a modest, steady contribution on top of the seasonal pattern.
Are air quality levels in Chilliwack 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