Stay updated with real-time air quality in SeaTac, 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)
54
Moderate
SeaTac, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
47.27 μg/m³
0
55
155
255
425
605+
14.18 ppb
0
55
71
86
201
201+
0.77 ppb
0
36
76
186
605
1005+
14.70 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
SeaTac, Washington
SeaTac, Washington
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AQI 54
Moderate
10.68μg/m³
PM2.5
47.27μg/m³
PM10
14.18ppb
O3
0.77ppb
SO2
14.70ppb
NO2
0.32ppm
CO
AQI 52
Moderate
9.60μg/m³
PM2.5
43.00μg/m³
PM10
14.11ppb
O3
0.77ppb
SO2
14.89ppb
NO2
0.32ppm
CO
AQI 52
Moderate
10.22μg/m³
PM2.5
42.26μg/m³
PM10
14.19ppb
O3
0.79ppb
SO2
18.14ppb
NO2
0.31ppm
CO
AQI 56
Moderate
11.79μg/m³
PM2.5
52.53μg/m³
PM10
14.30ppb
O3
0.73ppb
SO2
12.94ppb
NO2
0.31ppm
CO
AQI 56
Moderate
11.77μg/m³
PM2.5
51.99μg/m³
PM10
14.08ppb
O3
0.78ppb
SO2
14.45ppb
NO2
0.30ppm
CO
AQI 54
Moderate
11.48μg/m³
PM2.5
50.32μg/m³
PM10
14.12ppb
O3
0.78ppb
SO2
14.65ppb
NO2
0.30ppm
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 Seatac, Washington is updated every hour for accuracy.
In the past 24 hours, the air quality in Seatac, Washington was at its worst at 07:00:00 on 2026-10-05.
In the last 24 hours, the best air quality in Seatac, Washington was observed at 04:00:00 on 2026-10-05.
As of now, the AQI in Seatac, Washington is 54, indicating Moderate conditions.
Seatac, Washington air has the highest levels of PM2.5.
Poor air quality in Seatac, Washington means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Seatac, Washington are currently 10.675 μg/m3.
The PM10 concentration in Seatac, Washington is 47.271 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Seatac, Washington is 0.315 ppm.
Currently, Seatac, Washington has a sulfur dioxide (SO2) concentration of 0.77 ppb.
The current ozone (O3) level in Seatac, Washington at the moment is 14.177 ppm.
Nitrogen dioxide (NO2) level in Seatac, Washington at the moment is 14.704 ppb.
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