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)
22
Good
SeaTac, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.24 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.60 μg/m³
0
55
155
255
425
605+
12.53 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
7.64 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
SeaTac, Washington
SeaTac, Washington
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AQI 22
Good
4.27μg/m³
PM2.5
19.00μg/m³
PM10
10.29ppb
O3
0.20ppb
SO2
10.62ppb
NO2
0.11ppm
CO
AQI 22
Good
3.80μg/m³
PM2.5
17.00μg/m³
PM10
11.01ppb
O3
0.20ppb
SO2
9.66ppb
NO2
0.11ppm
CO
AQI 22
Good
4.19μg/m³
PM2.5
18.08μg/m³
PM10
11.01ppb
O3
0.20ppb
SO2
8.61ppb
NO2
0.11ppm
CO
AQI 16
Good
3.30μg/m³
PM2.5
14.71μg/m³
PM10
9.26ppb
O3
0.20ppb
SO2
13.13ppb
NO2
0.12ppm
CO
AQI 27
Good
5.36μg/m³
PM2.5
23.76μg/m³
PM10
10.55ppb
O3
0.20ppb
SO2
11.76ppb
NO2
0.11ppm
CO
AQI 27
Good
4.65μg/m³
PM2.5
20.53μg/m³
PM10
10.37ppb
O3
0.20ppb
SO2
11.75ppb
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 Seatac, Washington is updated every hour for accuracy.
In the past 24 hours, the air quality in Seatac, Washington was at its worst at 02:00:00 on 2026-07-13.
In the last 24 hours, the best air quality in Seatac, Washington was observed at 09:00:00 on 2026-07-13.
As of now, the AQI in Seatac, Washington is 22, indicating Good 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 4.236 μg/m3.
The PM10 concentration in Seatac, Washington is 18.598 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Seatac, Washington is 0.104 ppm.
Currently, Seatac, Washington has a sulfur dioxide (SO2) concentration of 0.366 ppb.
The current ozone (O3) level in Seatac, Washington at the moment is 12.533 ppm.
Nitrogen dioxide (NO2) level in Seatac, Washington at the moment is 7.639 ppb.
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