Live air quality index in Maryland, USA today
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)
45
Good
Maryland, USA
Last updated: ... (Local time)
Major air pollutants in Maryland, USA
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
4.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
19.65 μg/m³
0
55
155
255
425
605+
Ozone (O3)
48.98 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.28 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
2.65 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Maryland, USA
Maryland, USA
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Air quality in cities of Maryland, USA
| No results found | |||||||
| City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
|---|---|---|---|---|---|---|---|
Air quality in nearby states
Delaware, USA
AQI 40
Good
3.27μg/m³
PM2.5
14.01μg/m³
PM10
42.70ppb
O3
0.38ppb
SO2
3.54ppb
NO2
0.21ppm
CO
New Jersey, USA
AQI 39
Good
3.54μg/m³
PM2.5
15.73μg/m³
PM10
42.39ppb
O3
0.29ppb
SO2
6.75ppb
NO2
0.20ppm
CO
Pennsylvania, USA
AQI 41
Good
4.07μg/m³
PM2.5
17.52μg/m³
PM10
44.14ppb
O3
0.47ppb
SO2
3.90ppb
NO2
0.21ppm
CO
Virginia, USA
AQI 38
Good
4.18μg/m³
PM2.5
13.81μg/m³
PM10
40.88ppb
O3
0.34ppb
SO2
1.99ppb
NO2
0.17ppm
CO
New York, USA
AQI 35
Good
3.67μg/m³
PM2.5
15.13μg/m³
PM10
37.59ppb
O3
0.26ppb
SO2
4.17ppb
NO2
0.20ppm
CO
West Virginia, USA
AQI 37
Good
4.03μg/m³
PM2.5
17.86μg/m³
PM10
39.56ppb
O3
0.93ppb
SO2
4.14ppb
NO2
0.19ppm
CO
How accurate is Maryland, USA air quality data?
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
Frequently asked questions
How often is air quality information updated for Maryland, USA?
The air quality information for Maryland, USA is updated every hour for accuracy.
What time in the last 24 hours was the air quality in Maryland, USA at its worst?
In the past 24 hours, the air quality in Maryland, USA was at its worst at 09:00:00 on 2026-07-22.
When did Maryland, USA experience the best air quality in the last 24 hours?
In the last 24 hours, the best air quality in Maryland, USA was observed at 10:00:00 on 2026-07-23.
What is the AQI in Maryland, USA right now?
As of now, the AQI in Maryland, USA is 45, indicating Good conditions.
What is the most common type of pollution in Maryland, USA?
Maryland, USA air has the highest levels of O3.
What should I do in case of poor air quality in Maryland, USA?
Poor air quality in Maryland, USA means it's advisable to stay indoors and wear a mask for your protection.
What is the PM2.5 level in Maryland, USA at the moment?
PM2.5 levels in Maryland, USA are currently 4.682 μg/m3.
What is the PM10 level in Maryland, USA at the moment?
The PM10 concentration in Maryland, USA is 19.646 μg/m3 at the moment.
What is the carbon monoxide (CO) level in Maryland, USA at the moment?
The current carbon monoxide (CO) concentration in Maryland, USA is 0.156 ppm.
What is the sulfur dioxide (SO2) level in Maryland, USA at the moment?
Currently, Maryland, USA has a sulfur dioxide (SO2) concentration of 0.285 ppb.
What is the ozone (O3) level in Maryland, USA at the moment?
The current ozone (O3) level in Maryland, USA at the moment is 48.976 ppm.
What is the nitrogen dioxide (NO2) level in Maryland, USA at the moment?
Nitrogen dioxide (NO2) level in Maryland, USA at the moment is 2.646 ppb.
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