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)
22
Good
Decatur, Indiana
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
2.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.36 μg/m³
0
55
155
255
425
605+
23.53 ppb
0
55
71
86
201
201+
1.43 ppb
0
36
76
186
605
1005+
6.76 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Decatur, Indiana
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AQI 22
Good
2.48μg/m³
PM2.5
15.07μg/m³
PM10
23.60ppb
O3
1.47ppb
SO2
6.70ppb
NO2
0.21ppm
CO
AQI 21
Good
2.08μg/m³
PM2.5
8.42μg/m³
PM10
23.20ppb
O3
1.27ppb
SO2
6.29ppb
NO2
0.23ppm
CO
AQI 21
Good
3.10μg/m³
PM2.5
14.34μg/m³
PM10
23.18ppb
O3
1.36ppb
SO2
7.82ppb
NO2
0.24ppm
CO
AQI 21
Good
2.05μg/m³
PM2.5
8.24μg/m³
PM10
23.09ppb
O3
1.27ppb
SO2
6.40ppb
NO2
0.23ppm
CO
AQI 20
Good
1.75μg/m³
PM2.5
7.85μg/m³
PM10
21.86ppb
O3
0.53ppb
SO2
3.22ppb
NO2
0.16ppm
CO
AQI 21
Good
2.29μg/m³
PM2.5
10.44μg/m³
PM10
23.37ppb
O3
1.26ppb
SO2
6.37ppb
NO2
0.23ppm
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 10:00:00, 2025-10-21.
The best air quality in Decatur, Indiana was observed at 01:00:00 on 2025-10-22.
The air quality in Decatur, Indiana right now is Good, with an AQI of 22.
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 2.715 μg/m3.
Decatur, Indiana currently has a PM10 concentration of 12.359 μg/m3.
The current carbon monoxide (CO) level in Decatur, Indiana is 0.209 ppm.
The current sulfur dioxide (SO2) concentration in Decatur, Indiana is 1.43 ppb.
Decatur, Indiana currently has an ozone (O3) concentration of 23.53 ppm.
The current level of nitrogen dioxide (NO2) in Decatur, Indiana is 6.764 ppb.
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