Stay updated with real-time air quality in California, 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)
64
Moderate
California, Maryland
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.52 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.73 μg/m³
0
55
155
255
425
605+
59.49 ppb
0
55
71
86
201
201+
0.54 ppb
0
36
76
186
605
1005+
1.94 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
California, Maryland
California, Maryland
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AQI 67
Moderate
9.54μg/m³
PM2.5
24.95μg/m³
PM10
59.64ppb
O3
0.54ppb
SO2
3.91ppb
NO2
0.16ppm
CO
AQI 84
Moderate
9.06μg/m³
PM2.5
40.41μg/m³
PM10
64.57ppb
O3
0.41ppb
SO2
2.76ppb
NO2
0.16ppm
CO
AQI 64
Moderate
8.81μg/m³
PM2.5
27.95μg/m³
PM10
58.65ppb
O3
0.58ppb
SO2
1.83ppb
NO2
0.16ppm
CO
AQI 80
Moderate
8.06μg/m³
PM2.5
31.84μg/m³
PM10
64.50ppb
O3
0.58ppb
SO2
8.69ppb
NO2
0.16ppm
CO
AQI 71
Moderate
9.08μg/m³
PM2.5
42.57μg/m³
PM10
60.96ppb
O3
0.56ppb
SO2
4.16ppb
NO2
0.16ppm
CO
AQI 77
Moderate
9.14μg/m³
PM2.5
36.53μg/m³
PM10
62.65ppb
O3
0.62ppb
SO2
7.79ppb
NO2
0.16ppm
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 California, Maryland is updated every hour for accuracy.
In the past 24 hours, the air quality in California, Maryland was at its worst at 10:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in California, Maryland was observed at 03:00:00 on 2026-04-23.
As of now, the AQI in California, Maryland is 64, indicating Moderate conditions.
California, Maryland air has the highest levels of O3.
Poor air quality in California, Maryland means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in California, Maryland are currently 9.52 μg/m3.
The PM10 concentration in California, Maryland is 27.728 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in California, Maryland is 0.159 ppm.
Currently, California, Maryland has a sulfur dioxide (SO2) concentration of 0.541 ppb.
The current ozone (O3) level in California, Maryland at the moment is 59.486 ppm.
Nitrogen dioxide (NO2) level in California, Maryland at the moment is 1.938 ppb.
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