Stay updated with real-time air quality in Eureka, Missouri 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)
44
Good
Eureka, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.34 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
37.04 μg/m³
0
55
155
255
425
605+
32.09 ppb
0
55
71
86
201
201+
0.62 ppb
0
36
76
186
605
1005+
6.46 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Eureka, Missouri
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AQI 44
Good
8.40μg/m³
PM2.5
37.31μg/m³
PM10
33.22ppb
O3
0.57ppb
SO2
6.52ppb
NO2
0.19ppm
CO
AQI 49
Good
8.55μg/m³
PM2.5
39.57μg/m³
PM10
37.05ppb
O3
0.53ppb
SO2
7.20ppb
NO2
0.20ppm
CO
AQI 49
Good
8.55μg/m³
PM2.5
39.57μg/m³
PM10
37.05ppb
O3
0.53ppb
SO2
7.20ppb
NO2
0.20ppm
CO
AQI 49
Good
8.50μg/m³
PM2.5
38.55μg/m³
PM10
36.74ppb
O3
0.52ppb
SO2
7.01ppb
NO2
0.19ppm
CO
AQI 49
Good
8.73μg/m³
PM2.5
38.79μg/m³
PM10
38.53ppb
O3
0.41ppb
SO2
7.49ppb
NO2
0.20ppm
CO
AQI 44
Good
8.36μg/m³
PM2.5
36.60μg/m³
PM10
38.20ppb
O3
0.50ppb
SO2
8.12ppb
NO2
0.20ppm
CO
Air quality and pollutant data for Missouri, 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.
Source: Ambee Data Sources
The air quality information for Eureka, Missouri is updated every hour for accuracy.
In the past 24 hours, the air quality in Eureka, Missouri was at its worst at 05:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in Eureka, Missouri was observed at 10:00:00 on 2026-04-23.
As of now, the AQI in Eureka, Missouri is 44, indicating Good conditions.
Eureka, Missouri air has the highest levels of PM2.5.
Poor air quality in Eureka, Missouri means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Eureka, Missouri are currently 8.344 μg/m3.
The PM10 concentration in Eureka, Missouri is 37.041 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Eureka, Missouri is 0.194 ppm.
Currently, Eureka, Missouri has a sulfur dioxide (SO2) concentration of 0.617 ppb.
The current ozone (O3) level in Eureka, Missouri at the moment is 32.087 ppm.
Nitrogen dioxide (NO2) level in Eureka, Missouri at the moment is 6.462 ppb.
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