Real-time air quality index in Eureka, California today
Stay updated with real-time air quality in Eureka, 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)
52
Moderate
Eureka, California
Last updated: ... (Local time)
Common air pollutants in Eureka, California
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
9.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
42.98 μg/m³
0
55
155
255
425
605+
Ozone (O3)
23.38 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.36 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
6.58 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Eureka, California
Eureka, California
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Eureka, California air quality map: Real-time AQI near you
Air quality in nearby cities
Arcata, California
AQI 49
Good
9.33μg/m³
PM2.5
41.75μg/m³
PM10
23.38ppb
O3
0.36ppb
SO2
6.40ppb
NO2
0.20ppm
CO
McKinleyville, California
AQI 44
Good
7.71μg/m³
PM2.5
28.97μg/m³
PM10
23.39ppb
O3
0.36ppb
SO2
5.33ppb
NO2
0.20ppm
CO
Fortuna, California
AQI 44
Good
7.62μg/m³
PM2.5
30.66μg/m³
PM10
21.16ppb
O3
0.36ppb
SO2
5.56ppb
NO2
0.20ppm
CO
Redding, California
AQI 27
Good
5.42μg/m³
PM2.5
22.76μg/m³
PM10
28.88ppb
O3
0.50ppb
SO2
4.18ppb
NO2
0.18ppm
CO
Shasta Lake, California
AQI 32
Good
4.68μg/m³
PM2.5
17.92μg/m³
PM10
35.46ppb
O3
0.50ppb
SO2
4.83ppb
NO2
0.18ppm
CO
Anderson, California
AQI 28
Good
4.84μg/m³
PM2.5
20.82μg/m³
PM10
30.15ppb
O3
0.50ppb
SO2
4.30ppb
NO2
0.18ppm
CO
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.
Source: Ambee Data Sources
Frequently asked questions
How frequently is the air quality data for Eureka, California updated?
Air quality data for Eureka, California is updated on an hourly basis.
When did Eureka, California experience the worst air quality in the last 24 hours?
The worst air quality in Eureka, California was recorded at 05:00:00 on 2026-05-21.
When did Eureka, California have its best air quality in the last 24 hours?
The best air quality in Eureka, California was recorded at 07:00:00 on 2026-05-20.
What is the real-time air quality index for Eureka, California?
The real-time air quality index in Eureka, California is 52, currently categorized as Moderate.
Which pollutant is found most often in Eureka, California?
The most common pollutant in Eureka, California is PM2.5.
What can I do if the air quality in Eureka, California is poor?
If the air quality in Eureka, California is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Eureka, California?
The measured PM2.5 levels in Eureka, California at present are 9.596 μg/m3.
What are the current PM10 levels at Eureka, California?
The current PM10 levels in Eureka, California are 42.98 μg/m3.
What are the current carbon monoxide (CO) levels at Eureka, California?
The current carbon monoxide (CO) level in Eureka, California is 0.2 ppm.
What are the current sulfur dioxide (SO2) levels at Eureka, California?
The current sulfur dioxide (SO2) levels in Eureka, California are 0.363 ppb.
What are the current ozone (O3) levels at Eureka, California?
The current ozone (O3) levels at Eureka, California is 23.379 ppm.
What are the current nitrogen dioxide (NO2) levels at Eureka, California?
The current nitrogen dioxide (NO2) levels at Eureka, California is 6.581 ppb.
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