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)
66
Moderate
Eureka, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
16.73 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
69.19 μg/m³
0
55
155
255
425
605+
10.17 ppb
0
55
71
86
201
201+
0.77 ppb
0
36
76
186
605
1005+
7.33 ppb
0
54
101
361
1250
2050+
0.25 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Eureka, Missouri
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AQI 66
Moderate
16.96μg/m³
PM2.5
68.88μg/m³
PM10
10.63ppb
O3
0.77ppb
SO2
6.26ppb
NO2
0.24ppm
CO
AQI 56
Moderate
11.53μg/m³
PM2.5
37.43μg/m³
PM10
8.72ppb
O3
0.71ppb
SO2
7.29ppb
NO2
0.25ppm
CO
AQI 56
Moderate
11.53μg/m³
PM2.5
37.43μg/m³
PM10
8.72ppb
O3
0.71ppb
SO2
7.29ppb
NO2
0.25ppm
CO
AQI 58
Moderate
12.71μg/m³
PM2.5
44.08μg/m³
PM10
10.31ppb
O3
0.72ppb
SO2
6.92ppb
NO2
0.25ppm
CO
AQI 60
Moderate
13.86μg/m³
PM2.5
60.49μg/m³
PM10
9.35ppb
O3
0.64ppb
SO2
9.03ppb
NO2
0.27ppm
CO
AQI 58
Moderate
12.64μg/m³
PM2.5
55.79μg/m³
PM10
9.33ppb
O3
0.64ppb
SO2
8.74ppb
NO2
0.27ppm
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 09:00:00 on 2025-12-07.
In the last 24 hours, the best air quality in Eureka, Missouri was observed at 12:00:00 on 2025-12-07.
As of now, the AQI in Eureka, Missouri is 66, indicating Moderate 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 16.731 μg/m3.
The PM10 concentration in Eureka, Missouri is 69.188 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Eureka, Missouri is 0.246 ppm.
Currently, Eureka, Missouri has a sulfur dioxide (SO2) concentration of 0.767 ppb.
The current ozone (O3) level in Eureka, Missouri at the moment is 10.171 ppm.
Nitrogen dioxide (NO2) level in Eureka, Missouri at the moment is 7.331 ppb.
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