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
16.67 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
56.00 μg/m³
0
55
155
255
425
605+
8.35 ppb
0
55
71
86
201
201+
0.72 ppb
0
36
76
186
605
1005+
11.69 ppb
0
54
101
361
1250
2050+
0.45 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Eureka, Missouri
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AQI 66
Moderate
16.82μg/m³
PM2.5
82.61μg/m³
PM10
8.89ppb
O3
0.67ppb
SO2
9.77ppb
NO2
0.44ppm
CO
AQI 38
Good
7.06μg/m³
PM2.5
32.93μg/m³
PM10
10.50ppb
O3
0.67ppb
SO2
16.10ppb
NO2
0.46ppm
CO
AQI 38
Good
7.06μg/m³
PM2.5
32.93μg/m³
PM10
10.50ppb
O3
0.67ppb
SO2
16.10ppb
NO2
0.46ppm
CO
AQI 60
Moderate
13.63μg/m³
PM2.5
31.05μg/m³
PM10
16.69ppb
O3
0.64ppb
SO2
15.94ppb
NO2
0.45ppm
CO
AQI 52
Moderate
9.80μg/m³
PM2.5
35.16μg/m³
PM10
8.82ppb
O3
0.59ppb
SO2
17.09ppb
NO2
0.49ppm
CO
AQI 54
Moderate
11.26μg/m³
PM2.5
40.20μg/m³
PM10
6.90ppb
O3
0.62ppb
SO2
15.67ppb
NO2
0.50ppm
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 03:00:00 on 2025-06-05.
In the last 24 hours, the best air quality in Eureka, Missouri was observed at 08:00:00 on 2025-06-05.
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 16.667 μg/m3.
The PM10 concentration in Eureka, Missouri is 55.998 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Eureka, Missouri is 0.445 ppm.
Currently, Eureka, Missouri has a sulfur dioxide (SO2) concentration of 0.718 ppb.
The current ozone (O3) level in Eureka, Missouri at the moment is 8.347 ppm.
Nitrogen dioxide (NO2) level in Eureka, Missouri at the moment is 11.688 ppb.
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