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)
61
Moderate
California, Maryland
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.58 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.76 μg/m³
0
55
155
255
425
605+
57.85 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
3.04 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 61
Moderate
4.58μg/m³
PM2.5
15.76μg/m³
PM10
57.84ppb
O3
0.42ppb
SO2
3.04ppb
NO2
0.18ppm
CO
AQI 43
Good
1.51μg/m³
PM2.5
6.34μg/m³
PM10
45.86ppb
O3
0.33ppb
SO2
3.35ppb
NO2
0.18ppm
CO
AQI 51
Moderate
4.61μg/m³
PM2.5
20.40μg/m³
PM10
55.23ppb
O3
0.35ppb
SO2
3.06ppb
NO2
0.19ppm
CO
AQI 64
Moderate
4.63μg/m³
PM2.5
20.59μg/m³
PM10
58.80ppb
O3
0.36ppb
SO2
3.17ppb
NO2
0.20ppm
CO
AQI 61
Moderate
4.24μg/m³
PM2.5
14.75μg/m³
PM10
57.75ppb
O3
0.36ppb
SO2
3.23ppb
NO2
0.20ppm
CO
AQI 49
Good
4.27μg/m³
PM2.5
18.34μg/m³
PM10
52.66ppb
O3
0.36ppb
SO2
3.13ppb
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 61, 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 4.582 μg/m3.
The PM10 concentration in California, Maryland is 15.764 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 0.367 ppb.
The current ozone (O3) level in California, Maryland at the moment is 57.854 ppm.
Nitrogen dioxide (NO2) level in California, Maryland at the moment is 3.037 ppb.
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