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)
22
Good
Eureka, California
Last updated: ... (Local time)
Common air pollutants in Eureka, California
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
4.35 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
19.31 μg/m³
0
55
155
255
425
605+
Ozone (O3)
16.29 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.69 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
6.72 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.46 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 15
Good
2.30μg/m³
PM2.5
10.08μg/m³
PM10
16.36ppb
O3
0.63ppb
SO2
6.84ppb
NO2
0.44ppm
CO
McKinleyville, California
AQI 29
Good
4.95μg/m³
PM2.5
30.52μg/m³
PM10
12.87ppb
O3
0.63ppb
SO2
6.70ppb
NO2
0.44ppm
CO
Fortuna, California
AQI 30
Good
4.93μg/m³
PM2.5
32.32μg/m³
PM10
18.92ppb
O3
0.63ppb
SO2
5.96ppb
NO2
0.44ppm
CO
Redding, California
AQI 49
Good
9.00μg/m³
PM2.5
39.40μg/m³
PM10
10.96ppb
O3
0.64ppb
SO2
9.52ppb
NO2
0.43ppm
CO
Shasta Lake, California
AQI 44
Good
7.99μg/m³
PM2.5
34.30μg/m³
PM10
12.88ppb
O3
0.64ppb
SO2
9.39ppb
NO2
0.43ppm
CO
Anderson, California
AQI 49
Good
9.16μg/m³
PM2.5
35.32μg/m³
PM10
12.41ppb
O3
0.64ppb
SO2
8.91ppb
NO2
0.42ppm
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 11:00:00 on 2026-10-21.
When did Eureka, California have its best air quality in the last 24 hours?
The best air quality in Eureka, California was recorded at 02:00:00 on 2026-10-22.
What is the real-time air quality index for Eureka, California?
The real-time air quality index in Eureka, California is 22, currently categorized as Good.
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 4.347 μg/m3.
What are the current PM10 levels at Eureka, California?
The current PM10 levels in Eureka, California are 19.31 μg/m3.
What are the current carbon monoxide (CO) levels at Eureka, California?
The current carbon monoxide (CO) level in Eureka, California is 0.463 ppm.
What are the current sulfur dioxide (SO2) levels at Eureka, California?
The current sulfur dioxide (SO2) levels in Eureka, California are 0.692 ppb.
What are the current ozone (O3) levels at Eureka, California?
The current ozone (O3) levels at Eureka, California is 16.291 ppm.
What are the current nitrogen dioxide (NO2) levels at Eureka, California?
The current nitrogen dioxide (NO2) levels at Eureka, California is 6.721 ppb.
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