Worst air pollution Watrous, today and tomorrow
Today (20 September): Air quality in Watrous is very poor. AQI and NO2 are very poor; PM2.5 is moderate; PM10 is fair; O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (NO2: 99.3/100).
Tomorrow (21 September 2026): Air quality in Watrous is very poor. PM10 increases to moderate; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (NO2: 100/100). 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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Watrous's air quality reflects its small-town resort character, with Highway 2 summer-tourist traffic the primary modest local source.
Today - 20 September | Pollution peaks at 15:00
AQI:
Very poor
99.3/100
PM2.5 (fine particles):
Moderate
44.1/100
PM10 (coarse particles):
Fair
30.4/100
NO2 (nitrogen dioxide):
Very poor
99.3/100
O3 (ozone):
Good
15.2/100
SO2 (sulfur dioxide):
Good
7.3/100
CO (carbon monoxide):
Good
1.4/100
HCHO (formaldehyde):
Good
10.9/100
PM1 (ultrafine particles):
Good
13.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 13:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Moderate
55.1/100
PM10 (coarse particles):
Moderate
43.3/100
NO2 (nitrogen dioxide):
Very poor
100/100
O3 (ozone):
Good
16.6/100
SO2 (sulfur dioxide):
Good
13.3/100
CO (carbon monoxide):
Good
1.7/100
HCHO (formaldehyde):
Good
19.8/100
PM1 (ultrafine particles):
Fair
22.1/100
Pollen forecast in Watrous
View pollen forecastFrequently Asked Questions
Is air quality bad in Watrous right now?
On 20 September 2026, overall air quality in Watrous is very poor. AQI is the main air quality indicator at 99.3/100. Pollution peaks around 3:00 PM (NO2: 99.3/100).
Will air quality be worse tomorrow in Watrous?
On 21 September 2026, air quality conditions in Watrous will be similar to today, with AQI forecast at very poor at 100/100. Pollution peaks around 1:00 PM (NO2: 100/100).
When is air pollution at its worst in Watrous?
In Watrous, air quality changes through the year largely because of the mineral-rich waters of nearby Manitou Lake. Air quality is typically excellent for much of the year, though summer weekends bring a rise in vehicle traffic from visitors, and occasional wildfire smoke can drift in during hot, dry stretches. Weekday air quality is often noticeably better than on busy summer weekends when visitor numbers peak.
Are air quality levels in Watrous 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: 20 September 2026 at 14:33 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.
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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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