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)
71
Moderate
Decatur, Alabama
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
20.38 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
86.42 μg/m³
0
55
155
255
425
605+
4.27 ppb
0
55
71
86
201
201+
0.81 ppb
0
36
76
186
605
1005+
7.58 ppb
0
54
101
361
1250
2050+
0.43 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Decatur, Alabama
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AQI 71
Moderate
20.39μg/m³
PM2.5
86.46μg/m³
PM10
4.33ppb
O3
0.81ppb
SO2
7.57ppb
NO2
0.43ppm
CO
AQI 71
Moderate
20.36μg/m³
PM2.5
76.74μg/m³
PM10
5.91ppb
O3
0.78ppb
SO2
9.12ppb
NO2
0.38ppm
CO
AQI 79
Moderate
23.77μg/m³
PM2.5
66.96μg/m³
PM10
5.45ppb
O3
0.79ppb
SO2
9.26ppb
NO2
0.38ppm
CO
AQI 84
Moderate
27.49μg/m³
PM2.5
78.39μg/m³
PM10
7.81ppb
O3
0.79ppb
SO2
9.31ppb
NO2
0.39ppm
CO
AQI 75
Moderate
22.36μg/m³
PM2.5
63.92μg/m³
PM10
6.77ppb
O3
0.78ppb
SO2
9.53ppb
NO2
0.38ppm
CO
AQI 69
Moderate
19.31μg/m³
PM2.5
56.47μg/m³
PM10
10.00ppb
O3
0.91ppb
SO2
4.02ppb
NO2
0.44ppm
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 01:00:00 on 2026-08-16.
In the last 24 hrs, the best air quality in Decatur, Alabama was observed at 10:00:00 on 2026-08-15.
The current air quality in Decatur, Alabama is 71, 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 20.38 μg/m3.
The current PM10 concentration at Decatur, Alabama is 86.416 μg/m3.
The current carbon monoxide (CO) concentration at Decatur, Alabama is 0.428 ppm.
The current sulfur dioxide (SO2) concentration at Decatur, Alabama is 0.813 ppb.
The current ozone (O3) concentration at Decatur, Alabama is 4.27 ppm.
The current nitrogen dioxide (NO2) concentration at Decatur, Alabama is 7.58 ppb.
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