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)
54
Moderate
Eureka, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
62.18 μg/m³
0
55
155
255
425
605+
46.74 ppb
0
55
71
86
201
201+
1.22 ppb
0
36
76
186
605
1005+
9.87 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Eureka, Missouri
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AQI 49
Good
8.58μg/m³
PM2.5
34.09μg/m³
PM10
52.55ppb
O3
1.46ppb
SO2
4.62ppb
NO2
0.19ppm
CO
AQI 52
Moderate
9.76μg/m³
PM2.5
50.45μg/m³
PM10
53.34ppb
O3
1.41ppb
SO2
7.60ppb
NO2
0.20ppm
CO
AQI 52
Moderate
9.76μg/m³
PM2.5
50.45μg/m³
PM10
53.34ppb
O3
1.41ppb
SO2
7.60ppb
NO2
0.20ppm
CO
AQI 57
Moderate
10.09μg/m³
PM2.5
68.07μg/m³
PM10
53.08ppb
O3
1.40ppb
SO2
7.28ppb
NO2
0.20ppm
CO
AQI 49
Good
8.79μg/m³
PM2.5
31.29μg/m³
PM10
52.09ppb
O3
1.31ppb
SO2
5.08ppb
NO2
0.20ppm
CO
AQI 49
Good
8.47μg/m³
PM2.5
39.69μg/m³
PM10
53.43ppb
O3
1.45ppb
SO2
8.52ppb
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 2026-10-22.
In the last 24 hours, the best air quality in Eureka, Missouri was observed at 01:00:00 on 2026-10-22.
As of now, the AQI in Eureka, Missouri is 54, indicating Moderate conditions.
Eureka, Missouri air has the highest levels of PM10.
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 11.133 μg/m3.
The PM10 concentration in Eureka, Missouri is 62.178 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Eureka, Missouri is 0.283 ppm.
Currently, Eureka, Missouri has a sulfur dioxide (SO2) concentration of 1.222 ppb.
The current ozone (O3) level in Eureka, Missouri at the moment is 46.743 ppm.
Nitrogen dioxide (NO2) level in Eureka, Missouri at the moment is 9.873 ppb.
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