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Real-time air quality index in San Diego, California today

Stay updated with real-time air quality in San Diego, California featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

33

Good

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San Diego, California

Last updated: ... (Local time)

Major air pollutants in San Diego, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter2.5 (PM2.5)

5.91 μg/m³

0

12.1

35.5

55.5

250.5

500.5+

Particulate Matter10 (PM10)

15.09 μg/m³

0

55

155

255

425

605+

Ozone (O3)

34.14 ppb

0

55

71

86

201

201+

Sulfur Dioxide (SO2)

0.32 ppb

0

36

76

186

605

1005+

Nitrogen Dioxide (NO2)

2.76 ppb

0

54

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 ppm

0

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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San Diego, California

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How accurate is California, USA air quality data?

Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.


Frequently asked questions

How often is air quality information updated for San Diego, California?

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The air quality information for San Diego, California is updated every hour for accuracy.


What time in the last 24 hours was the air quality in San Diego, California at its worst?

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In the past 24 hours, the air quality in San Diego, California was at its worst at 06:00:00 on 2025-06-07.


When did San Diego, California experience the best air quality in the last 24 hours?

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In the last 24 hours, the best air quality in San Diego, California was observed at 03:00:00 on 2025-06-07.


What is the AQI in San Diego, California right now?

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As of now, the AQI in San Diego, California is 33, indicating Good conditions.


What is the most common type of pollution in San Diego, California?

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San Diego, California air has the highest levels of PM2.5.


What should I do in case of poor air quality in San Diego, California?

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Poor air quality in San Diego, California means it's advisable to stay indoors and wear a mask for your protection.


What is the PM2.5 level in San Diego, California at the moment?

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PM2.5 levels in San Diego, California are currently 5.908 μg/m3.


What is the PM10 level in San Diego, California at the moment?

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The PM10 concentration in San Diego, California is 15.093 μg/m3 at the moment.


What is the carbon monoxide (CO) level in San Diego, California at the moment?

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The current carbon monoxide (CO) concentration in San Diego, California is 0.218 ppm.


What is the sulfur dioxide (SO2) level in San Diego, California at the moment?

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Currently, San Diego, California has a sulfur dioxide (SO2) concentration of 0.316 ppb.


What is the ozone (O3) level in San Diego, California at the moment?

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The current ozone (O3) level in San Diego, California at the moment is 34.142 ppm.


What is the nitrogen dioxide (NO2) level in San Diego, California at the moment?

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Nitrogen dioxide (NO2) level in San Diego, California at the moment is 2.757 ppb.


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