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)
30
Good
Bellevue, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.28 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.14 μg/m³
0
55
155
255
425
605+
31.89 ppb
0
55
71
86
201
201+
0.14 ppb
0
36
76
186
605
1005+
11.72 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Bellevue, Washington
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AQI 31
Good
5.02μg/m³
PM2.5
18.85μg/m³
PM10
32.84ppb
O3
0.13ppb
SO2
12.38ppb
NO2
0.20ppm
CO
AQI 30
Good
4.50μg/m³
PM2.5
16.77μg/m³
PM10
32.32ppb
O3
0.15ppb
SO2
12.71ppb
NO2
0.20ppm
CO
AQI 29
Good
3.97μg/m³
PM2.5
16.53μg/m³
PM10
31.33ppb
O3
0.15ppb
SO2
11.25ppb
NO2
0.20ppm
CO
AQI 29
Good
3.91μg/m³
PM2.5
16.11μg/m³
PM10
31.49ppb
O3
0.15ppb
SO2
11.88ppb
NO2
0.20ppm
CO
AQI 33
Good
5.73μg/m³
PM2.5
22.77μg/m³
PM10
33.97ppb
O3
0.12ppb
SO2
17.12ppb
NO2
0.20ppm
CO
AQI 28
Good
2.60μg/m³
PM2.5
10.29μg/m³
PM10
30.29ppb
O3
0.18ppb
SO2
14.38ppb
NO2
0.20ppm
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 11:00:00 on 2026-04-19.
The best air quality in Bellevue, Washington was recorded at 03:00:00 on 2026-04-19.
The real-time air quality index in Bellevue, Washington is 30, currently categorized as Good.
The most common pollutant in Bellevue, Washington is O3.
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 4.279 μg/m3.
The current PM10 levels in Bellevue, Washington are 17.136 μg/m3.
The current carbon monoxide (CO) level in Bellevue, Washington is 0.199 ppm.
The current sulfur dioxide (SO2) levels in Bellevue, Washington are 0.142 ppb.
The current ozone (O3) levels at Bellevue, Washington is 31.888 ppm.
The current nitrogen dioxide (NO2) levels at Bellevue, Washington is 11.721 ppb.
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