Castle Street Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in Saint John
Last Updated: 2026-08-09 14:51:01 (Local Time)
20 °C
Fog
Presently, Saint John ranks for having the good air quality among cities worldwide.
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AQI Graph
Historical Air Quality Data
Castle Street
AQI (US) Trends - Annual Air Quality Changes
Castle Street, Saint John, New Brunswick, Canada
Canada's Metro Cities
Air Quality Index
Air Quality Calendar 2026
Castle Street
Health Advice For People Living In
Castle Street
0Cigarettes per day
Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.
Source:
Berkeley Earth
Solutions for Current AQI (US)
Prevent Health Problems: Understand Your Risks
Castle Street
Asthma
Heart Issues
Allergies
Sinus
Cold/Flu
Chronic (COPD)
Most Polluted Cities 2026
Canada
Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Cranbrook, British Columbia
Unhealthy
7xabove Standard
2.
Castlegar, British Columbia
Unhealthy
7xabove Standard
3.
Trail, British Columbia
Unhealthy
7xabove Standard
4.
Creston, British Columbia
Unhealthy
6xabove Standard
5.
Kamloops, British Columbia
Unhealthy
4xabove Standard
6.
Vernon, British Columbia
Poor
3xabove Standard
7.
Hinton, Alberta
Moderate
2xabove Standard
8.
Calgary, Alberta
Moderate
2xabove Standard
9.
Lethbridge, Alberta
Moderate
2xabove Standard
10.
Airdrie, Alberta
Moderate
2xabove Standard
Last Updated: 09 Aug 2026, 05:53 PM
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Frequently Asked Questions About Air Quality
1. What is the current AQI (US) level in Castle Street?
1. What is the current AQI (US) level in Castle Street?
The current real-time AQI (US) level in Castle Street is 32 (Good). This was last updated 2026-08-09 14:51:01 (Local Time).
2. When was the best AQI (US) level in Castle Street in the last 24 hours?
2. When was the best AQI (US) level in Castle Street in the last 24 hours?
The best AQI (US) level was 21 (Good) at 6:31 AM (Local Time) during the last 24 hours.
3. When was the worst AQI (US) level in Castle Street in the last 24 hours?
3. When was the worst AQI (US) level in Castle Street in the last 24 hours?
The worst AQI (US) level was 52 (Moderate) at 3:31 PM, Aug 8, 2026 (Local Time) during the last 24 hours.
4. What is the current trend of AQI (US) levels in Castle Street during last 24 hours?
4. What is the current trend of AQI (US) levels in Castle Street during last 24 hours?
The AQI (US) levels in Castle Street have been fluctuating throughout the last 24 hours. The levels have increased by highest 52 at 3:31 PM, Aug 8, 2026 (Local Time), lowest 21 at 6:31 AM (Local Time).
5. What actions are recommended as per the current AQI (US) level in Castle Street?
5. What actions are recommended as per the current AQI (US) level in Castle Street?
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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