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
6.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.66 μg/m³
0
55
155
255
425
605+
47.10 ppb
0
55
71
86
201
201+
0.55 ppb
0
36
76
186
605
1005+
2.63 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Eureka, Missouri
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AQI 43
Good
6.14μg/m³
PM2.5
22.41μg/m³
PM10
46.43ppb
O3
0.53ppb
SO2
2.57ppb
NO2
0.21ppm
CO
AQI 39
Good
5.45μg/m³
PM2.5
22.28μg/m³
PM10
41.92ppb
O3
0.45ppb
SO2
2.71ppb
NO2
0.21ppm
CO
AQI 39
Good
5.45μg/m³
PM2.5
22.28μg/m³
PM10
41.92ppb
O3
0.45ppb
SO2
2.71ppb
NO2
0.21ppm
CO
AQI 39
Good
5.97μg/m³
PM2.5
24.27μg/m³
PM10
41.96ppb
O3
0.46ppb
SO2
2.71ppb
NO2
0.21ppm
CO
AQI 40
Good
5.83μg/m³
PM2.5
21.56μg/m³
PM10
43.13ppb
O3
0.41ppb
SO2
2.56ppb
NO2
0.21ppm
CO
AQI 41
Good
5.31μg/m³
PM2.5
21.33μg/m³
PM10
43.61ppb
O3
0.41ppb
SO2
2.79ppb
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 11:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Eureka, Missouri was observed at 12:00:00 on 2026-07-23.
As of now, the AQI in Eureka, Missouri is 44, indicating Good conditions.
Eureka, Missouri air has the highest levels of O3.
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 6.128 μg/m3.
The PM10 concentration in Eureka, Missouri is 22.655 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Eureka, Missouri is 0.214 ppm.
Currently, Eureka, Missouri has a sulfur dioxide (SO2) concentration of 0.549 ppb.
The current ozone (O3) level in Eureka, Missouri at the moment is 47.103 ppm.
Nitrogen dioxide (NO2) level in Eureka, Missouri at the moment is 2.628 ppb.
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