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)
49
Good
Issaquah, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.65 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.53 μg/m³
0
55
155
255
425
605+
5.10 ppb
0
55
71
86
201
201+
0.43 ppb
0
36
76
186
605
1005+
9.24 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Issaquah, Washington
Issaquah, Washington
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AQI 22
Good
4.00μg/m³
PM2.5
16.86μg/m³
PM10
6.56ppb
O3
0.40ppb
SO2
9.19ppb
NO2
0.22ppm
CO
AQI 22
Good
4.42μg/m³
PM2.5
18.11μg/m³
PM10
6.43ppb
O3
0.39ppb
SO2
9.50ppb
NO2
0.22ppm
CO
AQI 22
Good
4.21μg/m³
PM2.5
17.64μg/m³
PM10
9.30ppb
O3
0.40ppb
SO2
10.14ppb
NO2
0.22ppm
CO
AQI 33
Good
5.88μg/m³
PM2.5
12.81μg/m³
PM10
6.58ppb
O3
0.40ppb
SO2
8.55ppb
NO2
0.22ppm
CO
AQI 22
Good
4.17μg/m³
PM2.5
16.61μg/m³
PM10
8.61ppb
O3
0.40ppb
SO2
12.77ppb
NO2
0.21ppm
CO
AQI 33
Good
5.55μg/m³
PM2.5
21.02μg/m³
PM10
8.83ppb
O3
0.40ppb
SO2
15.45ppb
NO2
0.22ppm
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 2026-08-17.
In the last 24 hours, the best air quality in Issaquah, Washington was observed at 05:00:00 on 2026-08-16.
As of now, the AQI in Issaquah, Washington is 49, 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 8.646 μg/m3.
The PM10 concentration in Issaquah, Washington is 34.531 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Issaquah, Washington is 0.232 ppm.
Currently, Issaquah, Washington has a sulfur dioxide (SO2) concentration of 0.433 ppb.
The current ozone (O3) level in Issaquah, Washington at the moment is 5.102 ppm.
Nitrogen dioxide (NO2) level in Issaquah, Washington at the moment is 9.244 ppb.
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