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
3.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.54 μg/m³
0
55
155
255
425
605+
18.91 ppb
0
55
71
86
201
201+
0.74 ppb
0
36
76
186
605
1005+
7.86 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Bellevue, Washington
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AQI 27
Good
5.07μg/m³
PM2.5
20.84μg/m³
PM10
13.62ppb
O3
0.65ppb
SO2
6.84ppb
NO2
0.15ppm
CO
AQI 22
Good
3.60μg/m³
PM2.5
14.83μg/m³
PM10
13.27ppb
O3
0.63ppb
SO2
7.90ppb
NO2
0.16ppm
CO
AQI 22
Good
4.18μg/m³
PM2.5
18.04μg/m³
PM10
12.00ppb
O3
0.63ppb
SO2
7.36ppb
NO2
0.15ppm
CO
AQI 22
Good
3.80μg/m³
PM2.5
16.28μg/m³
PM10
12.11ppb
O3
0.62ppb
SO2
7.44ppb
NO2
0.15ppm
CO
AQI 16
Good
2.87μg/m³
PM2.5
11.37μg/m³
PM10
12.34ppb
O3
0.64ppb
SO2
8.34ppb
NO2
0.19ppm
CO
AQI 28
Good
4.50μg/m³
PM2.5
29.76μg/m³
PM10
11.20ppb
O3
0.56ppb
SO2
8.31ppb
NO2
0.17ppm
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 2026-10-22.
The best air quality in Bellevue, Washington was recorded at 08:00:00 on 2026-10-22.
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 3.716 μg/m3.
The current PM10 levels in Bellevue, Washington are 15.542 μg/m3.
The current carbon monoxide (CO) level in Bellevue, Washington is 0.187 ppm.
The current sulfur dioxide (SO2) levels in Bellevue, Washington are 0.745 ppb.
The current ozone (O3) levels at Bellevue, Washington is 18.905 ppm.
The current nitrogen dioxide (NO2) levels at Bellevue, Washington is 7.857 ppb.
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