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)
49
Good
California, Maryland
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.59 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.25 μg/m³
0
55
155
255
425
605+
52.52 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
4.05 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
California, Maryland
California, Maryland
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AQI 46
Good
3.58μg/m³
PM2.5
18.82μg/m³
PM10
50.08ppb
O3
0.41ppb
SO2
4.04ppb
NO2
0.18ppm
CO
AQI 45
Good
2.65μg/m³
PM2.5
10.84μg/m³
PM10
48.68ppb
O3
0.31ppb
SO2
4.02ppb
NO2
0.18ppm
CO
AQI 61
Moderate
3.79μg/m³
PM2.5
10.88μg/m³
PM10
57.68ppb
O3
0.32ppb
SO2
4.11ppb
NO2
0.19ppm
CO
AQI 51
Moderate
3.64μg/m³
PM2.5
16.81μg/m³
PM10
54.71ppb
O3
0.33ppb
SO2
4.24ppb
NO2
0.20ppm
CO
AQI 50
Good
4.23μg/m³
PM2.5
19.51μg/m³
PM10
54.44ppb
O3
0.33ppb
SO2
4.29ppb
NO2
0.20ppm
CO
AQI 48
Good
3.79μg/m³
PM2.5
12.89μg/m³
PM10
52.14ppb
O3
0.32ppb
SO2
4.18ppb
NO2
0.20ppm
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 2026-07-23.
In the last 24 hours, the best air quality in California, Maryland was observed at 10:00:00 on 2026-07-23.
As of now, the AQI in California, Maryland is 49, indicating Good 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 3.592 μg/m3.
The PM10 concentration in California, Maryland is 19.253 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in California, Maryland is 0.185 ppm.
Currently, California, Maryland has a sulfur dioxide (SO2) concentration of 0.342 ppb.
The current ozone (O3) level in California, Maryland at the moment is 52.521 ppm.
Nitrogen dioxide (NO2) level in California, Maryland at the moment is 4.046 ppb.
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