South 1st Street Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in El Cajon
Last Updated: 2026-07-17 05:11:01 (Local Time)
21 °C
Clear
Currently, El Cajon ranks 1206th among the cities with the highest AQI levels in the world.
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AQI (US) Trends - Annual Air Quality Changes
South 1st Street, El Cajon, California, United States
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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)
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Asthma
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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.
Cary, Illinois
Hazardous
16xabove Standard
2.
Cicero, Illinois
Hazardous
17xabove Standard
3.
Green Bay, Wisconsin
Hazardous
19xabove Standard
4.
Columbus, Ohio
Hazardous
18xabove Standard
5.
Greendale, Wisconsin
Hazardous
19xabove Standard
6.
Toledo, Ohio
Hazardous
19xabove Standard
7.
Milwaukee, Wisconsin
Hazardous
18xabove Standard
8.
Lansing, Michigan
Hazardous
18xabove Standard
9.
Shorewood, Wisconsin
Hazardous
18xabove Standard
10.
Appleton, Wisconsin
Hazardous
18xabove Standard
Last Updated: 17 Jul 2026, 12:14 PM
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Frequently Asked Questions About Air Quality
1. What is the current AQI (US) level in South 1st Street?
1. What is the current AQI (US) level in South 1st Street?
The current real-time AQI (US) level in South 1st Street is 52 (Moderate). This was last updated 2026-07-17 05:11:01 (Local Time).
2. When was the best AQI (US) level in South 1st Street in the last 24 hours?
2. When was the best AQI (US) level in South 1st Street in the last 24 hours?
The best AQI (US) level was 27 (Good) at 5:31 AM, Jul 16, 2026 (Local Time) during the last 24 hours.
3. When was the worst AQI (US) level in South 1st Street in the last 24 hours?
3. When was the worst AQI (US) level in South 1st Street in the last 24 hours?
The worst AQI (US) level was 52 (Moderate) at 4:01 AM (Local Time) during the last 24 hours.
4. What is the current trend of AQI (US) levels in South 1st Street during last 24 hours?
4. What is the current trend of AQI (US) levels in South 1st Street during last 24 hours?
The AQI (US) levels in South 1st Street have been fluctuating throughout the last 24 hours. The levels have increased by highest 52 at 4:01 AM (Local Time), lowest 27 at 5:31 AM, Jul 16, 2026 (Local Time).
5. What actions are recommended as per the current AQI (US) level in South 1st Street?
5. What actions are recommended as per the current AQI (US) level in South 1st Street?
Current AQI (US) levels are acceptable; however, some pollutants may be a concern for a small number of sensitive individuals.
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