Stay updated with real-time air quality in Bellevue, Washington 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)
22
Good
Bellevue, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.14 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.06 μg/m³
0
55
155
255
425
605+
16.29 ppb
0
55
71
86
201
201+
0.47 ppb
0
36
76
186
605
1005+
17.98 ppb
0
54
101
361
1250
2050+
0.37 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Bellevue, Washington
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AQI 27
Good
5.10μg/m³
PM2.5
22.72μg/m³
PM10
12.30ppb
O3
0.21ppb
SO2
16.04ppb
NO2
0.33ppm
CO
AQI 22
Good
4.34μg/m³
PM2.5
19.33μg/m³
PM10
13.13ppb
O3
0.21ppb
SO2
16.64ppb
NO2
0.34ppm
CO
AQI 16
Good
2.94μg/m³
PM2.5
13.04μg/m³
PM10
15.15ppb
O3
0.21ppb
SO2
13.42ppb
NO2
0.33ppm
CO
AQI 16
Good
3.15μg/m³
PM2.5
13.96μg/m³
PM10
14.83ppb
O3
0.21ppb
SO2
13.90ppb
NO2
0.33ppm
CO
AQI 33
Good
6.20μg/m³
PM2.5
27.92μg/m³
PM10
11.75ppb
O3
0.21ppb
SO2
18.98ppb
NO2
0.38ppm
CO
AQI 27
Good
4.50μg/m³
PM2.5
18.09μg/m³
PM10
20.52ppb
O3
0.21ppb
SO2
16.65ppb
NO2
0.32ppm
CO
Air quality measurements for Washington, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Bellevue, Washington is updated on an hourly basis.
The worst air quality in Bellevue, Washington was recorded at 03:00:00 on 2025-12-12.
The best air quality in Bellevue, Washington was recorded at 09:00:00 on 2025-12-11.
The real-time air quality index in Bellevue, Washington is 22, currently categorized as Good.
The most common pollutant in Bellevue, Washington is PM2.5.
If the air quality in Bellevue, Washington is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Bellevue, Washington at present are 4.144 μg/m3.
The current PM10 levels in Bellevue, Washington are 18.062 μg/m3.
The current carbon monoxide (CO) level in Bellevue, Washington is 0.37 ppm.
The current sulfur dioxide (SO2) levels in Bellevue, Washington are 0.473 ppb.
The current ozone (O3) levels at Bellevue, Washington is 16.286 ppm.
The current nitrogen dioxide (NO2) levels at Bellevue, Washington is 17.975 ppb.
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