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)
22
Good
Greenbelt, Maryland
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.23 μg/m³
0
55
155
255
425
605+
23.67 ppb
0
55
71
86
201
201+
0.55 ppb
0
36
76
186
605
1005+
5.77 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Greenbelt, Maryland
Greenbelt, Maryland
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AQI 35
Good
4.05μg/m³
PM2.5
17.89μg/m³
PM10
38.23ppb
O3
0.25ppb
SO2
2.42ppb
NO2
0.15ppm
CO
AQI 36
Good
4.27μg/m³
PM2.5
18.77μg/m³
PM10
38.77ppb
O3
0.27ppb
SO2
2.46ppb
NO2
0.17ppm
CO
AQI 31
Good
3.49μg/m³
PM2.5
15.44μg/m³
PM10
33.41ppb
O3
0.24ppb
SO2
2.68ppb
NO2
0.11ppm
CO
AQI 35
Good
4.05μg/m³
PM2.5
17.89μg/m³
PM10
38.23ppb
O3
0.25ppb
SO2
2.42ppb
NO2
0.15ppm
CO
AQI 36
Good
4.42μg/m³
PM2.5
20.05μg/m³
PM10
38.85ppb
O3
0.28ppb
SO2
1.72ppb
NO2
0.18ppm
CO
AQI 36
Good
4.37μg/m³
PM2.5
19.54μg/m³
PM10
38.90ppb
O3
0.28ppb
SO2
2.13ppb
NO2
0.18ppm
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 09:00:00 on 2026-10-05.
In the last 24 hours, the best air quality in Greenbelt, Maryland was observed at 09:00:00 on 2026-10-05.
As of now, the AQI in Greenbelt, Maryland is 33, 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 3.708 μg/m3.
The PM10 concentration in Greenbelt, Maryland is 16.258 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Greenbelt, Maryland is 0.124 ppm.
Currently, Greenbelt, Maryland has a sulfur dioxide (SO2) concentration of 0.244 ppb.
The current ozone (O3) level in Greenbelt, Maryland at the moment is 35.722 ppm.
Nitrogen dioxide (NO2) level in Greenbelt, Maryland at the moment is 2.655 ppb.
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