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Real-time air quality index in Fullerton, California today

Stay updated with real-time air quality in Fullerton, 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)

29

Good

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Fullerton, California

Last updated: ... (Local time)

Common air pollutants in Fullerton, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter2.5 (PM2.5)

4.50 μg/m³

0

12.1

35.5

55.5

250.5

500.5+

Particulate Matter10 (PM10)

15.27 μg/m³

0

55

155

255

425

605+

Ozone (O3)

31.50 ppb

0

55

71

86

201

201+

Sulfur Dioxide (SO2)

0.41 ppb

0

36

76

186

605

1005+

Nitrogen Dioxide (NO2)

8.19 ppb

0

54

101

361

1250

2050+

Carbon Monoxide (CO)

0.27 ppm

0

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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Fullerton, California

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Fullerton, California air quality map: Real-time AQI near you




How accurate is California, USA air quality data?

Air quality measurements for California, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.


Frequently asked questions

How frequently is the air quality data for Fullerton, California updated?

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Air quality data for Fullerton, California is updated on an hourly basis.


When did Fullerton, California experience the worst air quality in the last 24 hours?

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The worst air quality in Fullerton, California was recorded at 10:00:00 on 2025-07-25.


When did Fullerton, California have its best air quality in the last 24 hours?

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The best air quality in Fullerton, California was recorded at 11:00:00 on 2025-07-26.


What is the real-time air quality index for Fullerton, California?

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The real-time air quality index in Fullerton, California is 27, currently categorized as Good.


Which pollutant is found most often in Fullerton, California?

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The most common pollutant in Fullerton, California is PM2.5.


What can I do if the air quality in Fullerton, California is poor?

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If the air quality in Fullerton, California is poor, limit outdoor activities and use a mask to safeguard your health.


What are the current PM2.5 levels in Fullerton, California?

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The measured PM2.5 levels in Fullerton, California at present are 5.214 μg/m3.


What are the current PM10 levels at Fullerton, California?

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The current PM10 levels in Fullerton, California are 10.909 μg/m3.


What are the current carbon monoxide (CO) levels at Fullerton, California?

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The current carbon monoxide (CO) level in Fullerton, California is 0.216 ppm.


What are the current sulfur dioxide (SO2) levels at Fullerton, California?

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The current sulfur dioxide (SO2) levels in Fullerton, California are 0.2 ppb.


What are the current ozone (O3) levels at Fullerton, California?

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The current ozone (O3) levels at Fullerton, California is 27.896 ppm.


What are the current nitrogen dioxide (NO2) levels at Fullerton, California?

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The current nitrogen dioxide (NO2) levels at Fullerton, California is 5.009 ppb.


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