Stay updated with real-time air quality in Decatur, Indiana 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
Decatur, Indiana
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
16.56 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
51.53 μg/m³
0
55
155
255
425
605+
50.64 ppb
0
55
71
86
201
201+
1.11 ppb
0
36
76
186
605
1005+
4.57 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Decatur, Indiana
Scroll To Air Quality MapLoading...
AQI 33
Good
5.71μg/m³
PM2.5
20.67μg/m³
PM10
33.51ppb
O3
1.28ppb
SO2
6.51ppb
NO2
0.35ppm
CO
AQI 34
Good
5.09μg/m³
PM2.5
24.00μg/m³
PM10
37.46ppb
O3
1.17ppb
SO2
5.82ppb
NO2
0.38ppm
CO
AQI 33
Good
4.36μg/m³
PM2.5
17.64μg/m³
PM10
35.69ppb
O3
1.22ppb
SO2
6.88ppb
NO2
0.31ppm
CO
AQI 35
Good
5.04μg/m³
PM2.5
22.91μg/m³
PM10
37.63ppb
O3
1.18ppb
SO2
5.98ppb
NO2
0.38ppm
CO
AQI 38
Good
6.69μg/m³
PM2.5
29.40μg/m³
PM10
31.95ppb
O3
0.51ppb
SO2
4.44ppb
NO2
0.22ppm
CO
AQI 33
Good
5.63μg/m³
PM2.5
36.34μg/m³
PM10
33.62ppb
O3
1.25ppb
SO2
5.95ppb
NO2
0.41ppm
CO
The air quality data for Indiana, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Decatur, Indiana are available every hour.
Decatur, Indiana experienced its worst air quality at 04:00:00, 2025-07-20.
The best air quality in Decatur, Indiana was observed at 10:00:00 on 2025-07-20.
The air quality in Decatur, Indiana right now is Good, with an AQI of 31.
In Decatur, Indiana, O3 is the most frequently found pollutant.
When air quality in Decatur, Indiana is compromised, staying indoors and wearing a mask can reduce health risks.
Decatur, Indiana currently has a PM2.5 concentration of 4.018 μg/m3.
Decatur, Indiana currently has a PM10 concentration of 20.141 μg/m3.
The current carbon monoxide (CO) level in Decatur, Indiana is 0.355 ppm.
The current sulfur dioxide (SO2) concentration in Decatur, Indiana is 1.158 ppb.
Decatur, Indiana currently has an ozone (O3) concentration of 34.124 ppm.
The current level of nitrogen dioxide (NO2) in Decatur, Indiana is 8.56 ppb.
All Rights Reserved © Ambee Inc. 2025