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Live air quality index in Diamond Bar, California today

Stay updated with real-time air quality in Diamond Bar, 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)

64

Moderate

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Diamond Bar, California

Last updated: ... (Local time)

Major air pollutants in Diamond Bar, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter2.5 (PM2.5)

15.66 μg/m³

0

12.1

35.5

55.5

250.5

500.5+

Particulate Matter10 (PM10)

56.22 μg/m³

0

55

155

255

425

605+

Ozone (O3)

29.04 ppb

0

55

71

86

201

201+

Sulfur Dioxide (SO2)

0.60 ppb

0

36

76

186

605

1005+

Nitrogen Dioxide (NO2)

15.24 ppb

0

54

101

361

1250

2050+

Carbon Monoxide (CO)

0.34 ppm

0

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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Diamond Bar, California

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Diamond Bar, 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 Diamond Bar, California updated?

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


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

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The worst air quality in Diamond Bar, California was recorded at 11:00:00 on 2025-07-10.


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

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The best air quality in Diamond Bar, California was recorded at 04:00:00 on 2025-07-11.


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

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The real-time air quality index in Diamond Bar, California is 56, currently categorized as Moderate.


Which pollutant is found most often in Diamond Bar, California?

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The most common pollutant in Diamond Bar, California is PM2.5.


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

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


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

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The measured PM2.5 levels in Diamond Bar, California at present are 11.996 μg/m3.


What are the current PM10 levels at Diamond Bar, California?

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The current PM10 levels in Diamond Bar, California are 47.44 μg/m3.


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

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The current carbon monoxide (CO) level in Diamond Bar, California is 0.288 ppm.


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

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The current sulfur dioxide (SO2) levels in Diamond Bar, California are 0.35 ppb.


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

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The current ozone (O3) levels at Diamond Bar, California is 18.885 ppm.


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

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The current nitrogen dioxide (NO2) levels at Diamond Bar, California is 12.802 ppb.


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