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)
24
Good
Issaquah, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.51 μg/m³
0
55
155
255
425
605+
18.98 ppb
0
55
71
86
201
201+
0.45 ppb
0
36
76
186
605
1005+
4.32 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Issaquah, Washington
Issaquah, Washington
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AQI 20
Good
3.40μg/m³
PM2.5
22.00μg/m³
PM10
18.51ppb
O3
0.46ppb
SO2
4.59ppb
NO2
0.12ppm
CO
AQI 19
Good
3.12μg/m³
PM2.5
21.27μg/m³
PM10
18.67ppb
O3
0.45ppb
SO2
4.31ppb
NO2
0.12ppm
CO
AQI 17
Good
3.42μg/m³
PM2.5
17.61μg/m³
PM10
18.22ppb
O3
0.46ppb
SO2
4.32ppb
NO2
0.11ppm
CO
AQI 22
Good
4.16μg/m³
PM2.5
18.77μg/m³
PM10
18.46ppb
O3
0.46ppb
SO2
6.27ppb
NO2
0.11ppm
CO
AQI 22
Good
4.26μg/m³
PM2.5
17.92μg/m³
PM10
19.32ppb
O3
0.48ppb
SO2
5.21ppb
NO2
0.11ppm
CO
AQI 22
Good
3.88μg/m³
PM2.5
15.46μg/m³
PM10
19.82ppb
O3
0.48ppb
SO2
4.49ppb
NO2
0.11ppm
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 2026-09-07.
In the last 24 hours, the best air quality in Issaquah, Washington was observed at 08:00:00 on 2026-09-07.
As of now, the AQI in Issaquah, Washington is 24, indicating Good conditions.
Issaquah, Washington air has the highest levels of PM10.
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 2.8 μg/m3.
The PM10 concentration in Issaquah, Washington is 25.508 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Issaquah, Washington is 0.118 ppm.
Currently, Issaquah, Washington has a sulfur dioxide (SO2) concentration of 0.446 ppb.
The current ozone (O3) level in Issaquah, Washington at the moment is 18.979 ppm.
Nitrogen dioxide (NO2) level in Issaquah, Washington at the moment is 4.32 ppb.
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