Waterloo Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in Waterloo
Last Updated: 2026-07-19 13:41:01 (Local Time)

21 °C
Partly CloudyCurrently, Waterloo ranks 935th among the cities with the highest AQI levels in the world.
Waterloo
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Waterloo
AQI (US) Trends - Annual Air Quality Changes
Waterloo, Ontario, Canada
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Waterloo
Health Advice For People Living In
Waterloo
1.5Cigarettes per day
Breathing the air in this location is as harmful as smoking 1.5 cigarettes a day.
Source:
Berkeley Earth
Solutions for Current AQI (US)
Prevent Health Problems: Understand Your Risks
Waterloo
Most Polluted Cities 2026
Canada
Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Windsor, Ontario
Poor
3xabove Standard
2.
Thunder Bay, Ontario
Poor
5xabove Standard
3.
Chatham, Ontario
Moderate
2xabove Standard
4.
Sault Ste. Marie, Ontario
Moderate
2xabove Standard
5.
Drayton Valley, Alberta
Moderate
1xabove Standard
6.
Prince Albert, Saskatchewan
Moderate
1xabove Standard
7.
Shawinigan, Quebec
Moderate
1xabove Standard
8.
Fort Saskatchewan, Alberta
Moderate
1xabove Standard
9.
Sorel Tracy, Quebec
Moderate
1xabove Standard
10.
Trois Rivieres, Quebec
Moderate
1xabove Standard
Last Updated: 19 Jul 2026, 05:48 PM
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at Waterloo
Frequently Asked Questions About Air Quality
1. What is the current AQI (US) level in Waterloo?
1. What is the current AQI (US) level in Waterloo?
The current real-time AQI (US) level in Waterloo is 38 (Good). This was last updated 2026-07-19 13:41:01 (Local Time).
2. When was the best AQI (US) level in Waterloo in the last 24 hours?
2. When was the best AQI (US) level in Waterloo in the last 24 hours?
The best AQI (US) level was 44 (Good) at 1:01 PM (Local Time) during the last 24 hours.
3. When was the worst AQI (US) level in Waterloo in the last 24 hours?
3. When was the worst AQI (US) level in Waterloo in the last 24 hours?
The worst AQI (US) level was 154 (Unhealthy) at 7:01 PM, Jul 18, 2026 (Local Time) during the last 24 hours.
4. What is the current trend of AQI (US) levels in Waterloo during last 24 hours?
4. What is the current trend of AQI (US) levels in Waterloo during last 24 hours?
The AQI (US) levels in Waterloo have been fluctuating throughout the last 24 hours. The levels have increased by highest 154 at 7:01 PM, Jul 18, 2026 (Local Time), lowest 44 at 1:01 PM (Local Time).
5. What actions are recommended as per the current AQI (US) level in Waterloo?
5. What actions are recommended as per the current AQI (US) level in Waterloo?
The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.
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