Stay updated with real-time air quality in Timonium, 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)
25
Good
Timonium, Maryland
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.04 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.45 μg/m³
0
55
155
255
425
605+
26.98 ppb
0
55
71
86
201
201+
0.40 ppb
0
36
76
186
605
1005+
3.33 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Timonium, Maryland
Timonium, Maryland
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AQI 25
Good
3.11μg/m³
PM2.5
13.99μg/m³
PM10
26.95ppb
O3
0.40ppb
SO2
3.34ppb
NO2
0.23ppm
CO
AQI 25
Good
3.00μg/m³
PM2.5
12.84μg/m³
PM10
26.81ppb
O3
0.40ppb
SO2
3.41ppb
NO2
0.23ppm
CO
AQI 25
Good
3.10μg/m³
PM2.5
13.98μg/m³
PM10
26.99ppb
O3
0.40ppb
SO2
3.31ppb
NO2
0.23ppm
CO
AQI 25
Good
2.72μg/m³
PM2.5
10.95μg/m³
PM10
26.97ppb
O3
0.40ppb
SO2
3.35ppb
NO2
0.23ppm
CO
AQI 25
Good
2.72μg/m³
PM2.5
10.95μg/m³
PM10
26.97ppb
O3
0.40ppb
SO2
3.35ppb
NO2
0.23ppm
CO
AQI 24
Good
3.62μg/m³
PM2.5
17.39μg/m³
PM10
25.89ppb
O3
0.41ppb
SO2
3.67ppb
NO2
0.23ppm
CO
Air quality data and pollutant measurements for Maryland, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Timonium, Maryland is updated every hour.
The worst air quality in Timonium, Maryland in the last 24 hours was observed at 09:00:00 on 2026-06-07.
In the last 24 hrs, the best air quality in Timonium, Maryland was observed at 03:00:00 on 2026-06-08.
The current air quality in Timonium, Maryland is 25, categorized as Good based on real-time data.
The most common pollutant in Timonium, Maryland is O3.
If the air quality in Timonium, Maryland is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Timonium, Maryland is 3.038 μg/m3.
The current PM10 concentration at Timonium, Maryland is 13.446 μg/m3.
The current carbon monoxide (CO) concentration at Timonium, Maryland is 0.234 ppm.
The current sulfur dioxide (SO2) concentration at Timonium, Maryland is 0.402 ppb.
The current ozone (O3) concentration at Timonium, Maryland is 26.984 ppm.
The current nitrogen dioxide (NO2) concentration at Timonium, Maryland is 3.328 ppb.
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