Stay updated with real-time air quality in Florissant, 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)
27
Good
Florissant, Missouri
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.77 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.17 μg/m³
0
55
155
255
425
605+
20.18 ppb
0
55
71
86
201
201+
0.53 ppb
0
36
76
186
605
1005+
5.09 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Florissant, Missouri
Florissant, Missouri
Scroll To Air Quality MapLoading...
AQI 27
Good
4.66μg/m³
PM2.5
21.64μg/m³
PM10
21.53ppb
O3
0.47ppb
SO2
5.08ppb
NO2
0.17ppm
CO
AQI 22
Good
3.90μg/m³
PM2.5
18.09μg/m³
PM10
20.33ppb
O3
0.56ppb
SO2
5.04ppb
NO2
0.15ppm
CO
AQI 33
Good
5.69μg/m³
PM2.5
25.52μg/m³
PM10
20.50ppb
O3
0.54ppb
SO2
5.00ppb
NO2
0.17ppm
CO
AQI 22
Good
4.30μg/m³
PM2.5
20.73μg/m³
PM10
22.10ppb
O3
0.42ppb
SO2
5.11ppb
NO2
0.17ppm
CO
AQI 22
Good
4.29μg/m³
PM2.5
19.94μg/m³
PM10
21.43ppb
O3
0.47ppb
SO2
5.18ppb
NO2
0.18ppm
CO
AQI 33
Good
6.07μg/m³
PM2.5
24.85μg/m³
PM10
19.89ppb
O3
0.57ppb
SO2
4.96ppb
NO2
0.16ppm
CO
Air quality measurements for Missouri, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Florissant, Missouri is updated on an hourly basis.
The worst air quality in Florissant, Missouri was recorded at 05:00:00 on 2026-06-07.
The best air quality in Florissant, Missouri was recorded at 10:00:00 on 2026-06-08.
The real-time air quality index in Florissant, Missouri is 27, currently categorized as Good.
The most common pollutant in Florissant, Missouri is PM2.5.
If the air quality in Florissant, Missouri is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Florissant, Missouri at present are 4.773 μg/m3.
The current PM10 levels in Florissant, Missouri are 21.169 μg/m3.
The current carbon monoxide (CO) level in Florissant, Missouri is 0.165 ppm.
The current sulfur dioxide (SO2) levels in Florissant, Missouri are 0.527 ppb.
The current ozone (O3) levels at Florissant, Missouri is 20.176 ppm.
The current nitrogen dioxide (NO2) levels at Florissant, Missouri is 5.094 ppb.
All Rights Reserved © Ambee Inc. 2025