Stay updated with real-time air quality in Decatur, Alabama 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)
52
Moderate
Decatur, Alabama
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.45 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
45.55 μg/m³
0
55
155
255
425
605+
24.98 ppb
0
55
71
86
201
201+
0.92 ppb
0
36
76
186
605
1005+
4.15 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Decatur, Alabama
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AQI 54
Moderate
10.72μg/m³
PM2.5
45.75μg/m³
PM10
25.10ppb
O3
1.05ppb
SO2
4.93ppb
NO2
0.24ppm
CO
AQI 54
Moderate
10.92μg/m³
PM2.5
46.75μg/m³
PM10
25.26ppb
O3
1.10ppb
SO2
5.03ppb
NO2
0.23ppm
CO
AQI 49
Good
9.33μg/m³
PM2.5
31.47μg/m³
PM10
23.76ppb
O3
1.04ppb
SO2
5.08ppb
NO2
0.23ppm
CO
AQI 49
Good
9.22μg/m³
PM2.5
23.73μg/m³
PM10
25.87ppb
O3
0.91ppb
SO2
5.12ppb
NO2
0.23ppm
CO
AQI 49
Good
9.30μg/m³
PM2.5
29.57μg/m³
PM10
26.12ppb
O3
0.96ppb
SO2
5.17ppb
NO2
0.23ppm
CO
AQI 54
Moderate
11.06μg/m³
PM2.5
32.40μg/m³
PM10
25.48ppb
O3
0.95ppb
SO2
4.13ppb
NO2
0.24ppm
CO
Air quality data and pollutant measurements for Alabama, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Decatur, Alabama is updated every hour.
The worst air quality in Decatur, Alabama in the last 24 hours was observed at 09:00:00 on 2026-07-23.
In the last 24 hrs, the best air quality in Decatur, Alabama was observed at 07:00:00 on 2026-07-23.
The current air quality in Decatur, Alabama is 52, categorized as Moderate based on real-time data.
The most common pollutant in Decatur, Alabama is PM2.5.
If the air quality in Decatur, Alabama is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Decatur, Alabama is 10.448 μg/m3.
The current PM10 concentration at Decatur, Alabama is 45.552 μg/m3.
The current carbon monoxide (CO) concentration at Decatur, Alabama is 0.226 ppm.
The current sulfur dioxide (SO2) concentration at Decatur, Alabama is 0.922 ppb.
The current ozone (O3) concentration at Decatur, Alabama is 24.975 ppm.
The current nitrogen dioxide (NO2) concentration at Decatur, Alabama is 4.154 ppb.
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