Northwest St. Louis Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in Northwest St. Louis
Last Updated: 2026-08-12 12:21:02 (Local Time)
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Northwest St. Louis
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Northwest St. Louis, Minnesota, United States
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Northwest St. Louis
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Northwest St. Louis
0Cigarettes per day
Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.
Source:
Berkeley Earth
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Northwest St. Louis
Asthma
Heart Issues
Allergies
Sinus
Cold/Flu
Chronic (COPD)
Most Polluted Cities 2026
United States
Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Colville, Washington
Unhealthy
6xabove Standard
2.
Sandpoint, Idaho
Poor
3xabove Standard
3.
Twin Falls, Idaho
Poor
2xabove Standard
4.
Omak, Washington
Moderate
2xabove Standard
5.
Airway Heights, Washington
Moderate
2xabove Standard
6.
Missoula, Montana
Moderate
2xabove Standard
7.
Hamilton, Montana
Moderate
2xabove Standard
8.
Garden City, Idaho
Moderate
2xabove Standard
9.
Shasta Lake, California
Moderate
2xabove Standard
10.
The Dalles, Oregon
Moderate
2xabove Standard
Last Updated: 12 Aug 2026, 05:22 PM
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Frequently Asked Questions About Air Quality
1. What is the current AQI (US) level in Northwest St. Louis?
1. What is the current AQI (US) level in Northwest St. Louis?
The current real-time AQI (US) level in Northwest St. Louis is 42 (Good). This was last updated 2026-08-12 12:21:02 (Local Time).
2. When was the best AQI (US) level in Northwest St. Louis in the last 24 hours?
2. When was the best AQI (US) level in Northwest St. Louis in the last 24 hours?
The best AQI (US) level was 21 (Good) at 12:31 PM, Aug 11, 2026 (Local Time) during the last 24 hours.
3. When was the worst AQI (US) level in Northwest St. Louis in the last 24 hours?
3. When was the worst AQI (US) level in Northwest St. Louis in the last 24 hours?
The worst AQI (US) level was 56 (Moderate) at 4:01 PM, Aug 11, 2026 (Local Time) during the last 24 hours.
4. What is the current trend of AQI (US) levels in Northwest St. Louis during last 24 hours?
4. What is the current trend of AQI (US) levels in Northwest St. Louis during last 24 hours?
The AQI (US) levels in Northwest St. Louis have been fluctuating throughout the last 24 hours. The levels have increased by highest 56 at 4:01 PM, Aug 11, 2026 (Local Time), lowest 21 at 12:31 PM, Aug 11, 2026 (Local Time).
5. What actions are recommended as per the current AQI (US) level in Northwest St. Louis?
5. What actions are recommended as per the current AQI (US) level in Northwest St. Louis?
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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