Worst air pollution Williams Lake, today and tomorrow
Today (9 August): Air quality in Williams Lake is poor. AQI and NO2 are poor; PM2.5, SO2, and PM1 are fair; O3 is medium; PM10, CO, and HCHO are good. Pollution peaks around 12:00 AM (NO2: 75.4/100).
Tomorrow (10 August 2026): Air quality in Williams Lake is fair. AQI improves to medium; PM2.5 decreases to good; NO2 decreases to medium; O3 increases to fair; SO2 decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (NO2: 48.5/100). Airmine updates local air quality forecasts four times daily.
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Williams Lake's air quality is affected by sawmill operations and summer wildfire smoke, both common to this Cariboo forestry town, with winter inversions trapping woodsmoke in the valley bowl.
Today - 9 August | Pollution peaks at 00:00
AQI:
Poor
75.4/100
PM2.5 (fine particles):
Fair
32.9/100
PM10 (coarse particles):
Good
9.5/100
NO2 (nitrogen dioxide):
Poor
75.4/100
O3 (ozone):
Medium
57.0/100
SO2 (sulfur dioxide):
Fair
32.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.0/100
PM1 (ultrafine particles):
Fair
39.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 13:00
AQI:
Medium
48.5/100
PM2.5 (fine particles):
Good
13.8/100
PM10 (coarse particles):
Good
5.5/100
NO2 (nitrogen dioxide):
Medium
48.5/100
O3 (ozone):
Fair
24.6/100
SO2 (sulfur dioxide):
Good
14.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
9.1/100
Pollen forecast in Williams Lake
View pollen forecastFrequently Asked Questions
Is air quality bad in Williams Lake right now?
On 9 August 2026, overall air quality in Williams Lake is poor. AQI is the main air quality indicator at 75.4/100. Pollution peaks around 12:00 AM (NO2: 75.4/100).
Will air quality be worse tomorrow in Williams Lake?
On 10 August 2026, air quality conditions in Williams Lake will be better than today, with O3 forecast at fair at 24.6/100. Pollution peaks around 1:00 PM (NO2: 48.5/100).
When is air pollution at its worst in Williams Lake?
Williams Lake's air quality follows a seasonal rhythm tied to its position amid the forestry mills of the Cariboo region. Air quality is generally very good outside of wildfire season, though hot, dry summers can bring smoky, hazy stretches when fires burn across the wider region. Local monitoring stations often see their highest readings of the year during major regional fire events.
Are air quality levels in Williams Lake 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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