Stay updated with real-time air quality in Greenbelt, Maryland 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)
41
Good
Greenbelt, Maryland
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.51 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.31 μg/m³
0
55
155
255
425
605+
43.87 ppb
0
55
71
86
201
201+
0.23 ppb
0
36
76
186
605
1005+
3.28 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Greenbelt, Maryland
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AQI 38
Good
3.53μg/m³
PM2.5
12.96μg/m³
PM10
40.65ppb
O3
0.30ppb
SO2
3.67ppb
NO2
0.15ppm
CO
AQI 35
Good
4.30μg/m³
PM2.5
17.83μg/m³
PM10
37.56ppb
O3
0.37ppb
SO2
4.39ppb
NO2
0.16ppm
CO
AQI 41
Good
1.92μg/m³
PM2.5
7.95μg/m³
PM10
43.97ppb
O3
0.23ppb
SO2
2.52ppb
NO2
0.12ppm
CO
AQI 38
Good
3.53μg/m³
PM2.5
12.96μg/m³
PM10
40.65ppb
O3
0.30ppb
SO2
3.67ppb
NO2
0.15ppm
CO
AQI 36
Good
4.92μg/m³
PM2.5
22.91μg/m³
PM10
38.89ppb
O3
0.40ppb
SO2
3.68ppb
NO2
0.17ppm
CO
AQI 34
Good
4.93μg/m³
PM2.5
22.35μg/m³
PM10
37.25ppb
O3
0.40ppb
SO2
4.16ppb
NO2
0.17ppm
CO
Air quality and pollutant data for Maryland, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Greenbelt, Maryland is updated every hour for accuracy.
In the past 24 hours, the air quality in Greenbelt, Maryland was at its worst at 01:00:00 on 2026-03-09.
In the last 24 hours, the best air quality in Greenbelt, Maryland was observed at 05:00:00 on 2026-03-09.
As of now, the AQI in Greenbelt, Maryland is 41, indicating Good conditions.
Greenbelt, Maryland air has the highest levels of O3.
Poor air quality in Greenbelt, Maryland means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Greenbelt, Maryland are currently 4.515 μg/m3.
The PM10 concentration in Greenbelt, Maryland is 21.309 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Greenbelt, Maryland is 0.144 ppm.
Currently, Greenbelt, Maryland has a sulfur dioxide (SO2) concentration of 0.23 ppb.
The current ozone (O3) level in Greenbelt, Maryland at the moment is 43.87 ppm.
Nitrogen dioxide (NO2) level in Greenbelt, Maryland at the moment is 3.281 ppb.
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