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)
33
Good
Decatur, Alabama
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
23.69 μg/m³
0
55
155
255
425
605+
22.72 ppb
0
55
71
86
201
201+
0.77 ppb
0
36
76
186
605
1005+
7.37 ppb
0
54
101
361
1250
2050+
0.44 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Decatur, Alabama
Scroll To Air Quality MapLoading...
AQI 33
Good
5.99μg/m³
PM2.5
26.18μg/m³
PM10
25.55ppb
O3
0.50ppb
SO2
6.91ppb
NO2
0.35ppm
CO
AQI 33
Good
5.67μg/m³
PM2.5
17.21μg/m³
PM10
25.67ppb
O3
0.40ppb
SO2
7.37ppb
NO2
0.38ppm
CO
AQI 33
Good
6.06μg/m³
PM2.5
18.08μg/m³
PM10
26.40ppb
O3
0.45ppb
SO2
7.37ppb
NO2
0.38ppm
CO
AQI 38
Good
6.59μg/m³
PM2.5
16.18μg/m³
PM10
25.47ppb
O3
0.39ppb
SO2
7.41ppb
NO2
0.38ppm
CO
AQI 33
Good
5.59μg/m³
PM2.5
13.02μg/m³
PM10
28.42ppb
O3
0.40ppb
SO2
7.64ppb
NO2
0.38ppm
CO
AQI 33
Good
5.91μg/m³
PM2.5
25.80μg/m³
PM10
26.87ppb
O3
0.43ppb
SO2
6.54ppb
NO2
0.34ppm
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 11:00:00 on 2026-01-22.
In the last 24 hrs, the best air quality in Decatur, Alabama was observed at 12:00:00 on 2026-01-23.
The current air quality in Decatur, Alabama is 33, categorized as Good 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 5.638 μg/m3.
The current PM10 concentration at Decatur, Alabama is 23.687 μg/m3.
The current carbon monoxide (CO) concentration at Decatur, Alabama is 0.444 ppm.
The current sulfur dioxide (SO2) concentration at Decatur, Alabama is 0.77 ppb.
The current ozone (O3) concentration at Decatur, Alabama is 22.724 ppm.
The current nitrogen dioxide (NO2) concentration at Decatur, Alabama is 7.374 ppb.
All Rights Reserved © Ambee Inc. 2025