Stay updated with real-time air quality in Issaquah, 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)
27
Good
Issaquah, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.52 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.47 μg/m³
0
55
155
255
425
605+
14.21 ppb
0
55
71
86
201
201+
0.19 ppb
0
36
76
186
605
1005+
9.18 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Issaquah, Washington
Issaquah, Washington
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AQI 27
Good
4.76μg/m³
PM2.5
19.32μg/m³
PM10
14.91ppb
O3
0.19ppb
SO2
9.46ppb
NO2
0.19ppm
CO
AQI 22
Good
3.30μg/m³
PM2.5
23.89μg/m³
PM10
17.85ppb
O3
0.19ppb
SO2
11.96ppb
NO2
0.18ppm
CO
AQI 22
Good
4.27μg/m³
PM2.5
18.01μg/m³
PM10
13.08ppb
O3
0.19ppb
SO2
8.63ppb
NO2
0.19ppm
CO
AQI 26
Good
3.80μg/m³
PM2.5
28.30μg/m³
PM10
11.90ppb
O3
0.23ppb
SO2
8.86ppb
NO2
0.19ppm
CO
AQI 33
Good
5.90μg/m³
PM2.5
21.61μg/m³
PM10
18.28ppb
O3
0.19ppb
SO2
11.69ppb
NO2
0.20ppm
CO
AQI 33
Good
5.92μg/m³
PM2.5
22.49μg/m³
PM10
15.37ppb
O3
0.19ppb
SO2
9.66ppb
NO2
0.20ppm
CO
Air quality and pollutant data for Washington, 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 Issaquah, Washington is updated every hour for accuracy.
In the past 24 hours, the air quality in Issaquah, Washington was at its worst at 03:00:00 on 2025-12-12.
In the last 24 hours, the best air quality in Issaquah, Washington was observed at 09:00:00 on 2025-12-11.
As of now, the AQI in Issaquah, Washington is 27, indicating Good conditions.
Issaquah, Washington air has the highest levels of PM2.5.
Poor air quality in Issaquah, Washington means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Issaquah, Washington are currently 4.519 μg/m3.
The PM10 concentration in Issaquah, Washington is 18.474 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Issaquah, Washington is 0.191 ppm.
Currently, Issaquah, Washington has a sulfur dioxide (SO2) concentration of 0.189 ppb.
The current ozone (O3) level in Issaquah, Washington at the moment is 14.208 ppm.
Nitrogen dioxide (NO2) level in Issaquah, Washington at the moment is 9.184 ppb.
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