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

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.71 μg/m³
0
55
155
255
425
605+
9.73 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
6.51 ppb
0
54
101
361
1250
2050+
0.30 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Maryland, USA
Maryland, USA
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| City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
|---|---|---|---|---|---|---|---|
AQI 27
Good
4.88μg/m³
PM2.5
20.88μg/m³
PM10
10.11ppb
O3
0.62ppb
SO2
5.43ppb
NO2
0.37ppm
CO
AQI 33
Good
5.56μg/m³
PM2.5
23.00μg/m³
PM10
13.56ppb
O3
0.41ppb
SO2
8.97ppb
NO2
0.40ppm
CO
AQI 33
Good
6.27μg/m³
PM2.5
26.91μg/m³
PM10
10.58ppb
O3
0.58ppb
SO2
5.55ppb
NO2
0.35ppm
CO
AQI 27
Good
5.49μg/m³
PM2.5
18.80μg/m³
PM10
10.70ppb
O3
0.52ppb
SO2
6.28ppb
NO2
0.31ppm
CO
AQI 33
Good
5.58μg/m³
PM2.5
21.57μg/m³
PM10
12.28ppb
O3
0.34ppb
SO2
5.28ppb
NO2
0.35ppm
CO
AQI 33
Good
6.45μg/m³
PM2.5
24.97μg/m³
PM10
13.65ppb
O3
0.83ppb
SO2
3.54ppb
NO2
0.29ppm
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 Maryland, USA is updated every hour for accuracy.
In the past 24 hours, the air quality in Maryland, USA was at its worst at 02:00:00 on 2026-09-07.
In the last 24 hours, the best air quality in Maryland, USA was observed at 03:00:00 on 2026-09-06.
As of now, the AQI in Maryland, USA is 33, indicating Good conditions.
Maryland, USA air has the highest levels of PM2.5.
Poor air quality in Maryland, USA means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Maryland, USA are currently 5.602 μg/m3.
The PM10 concentration in Maryland, USA is 22.709 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Maryland, USA is 0.303 ppm.
Currently, Maryland, USA has a sulfur dioxide (SO2) concentration of 0.291 ppb.
The current ozone (O3) level in Maryland, USA at the moment is 9.726 ppm.
Nitrogen dioxide (NO2) level in Maryland, USA at the moment is 6.513 ppb.
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