Stay updated with real-time air quality in Fort Lewis, 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)
25
Good
Fort Lewis, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.50 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.27 μg/m³
0
55
155
255
425
605+
27.08 ppb
0
55
71
86
201
201+
0.18 ppb
0
36
76
186
605
1005+
9.97 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Fort Lewis, Washington
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AQI 36
Good
2.02μg/m³
PM2.5
8.61μg/m³
PM10
38.62ppb
O3
0.31ppb
SO2
17.48ppb
NO2
0.22ppm
CO
AQI 36
Good
1.89μg/m³
PM2.5
8.15μg/m³
PM10
38.58ppb
O3
0.31ppb
SO2
16.78ppb
NO2
0.22ppm
CO
AQI 36
Good
1.76μg/m³
PM2.5
7.70μg/m³
PM10
38.72ppb
O3
0.31ppb
SO2
16.65ppb
NO2
0.22ppm
CO
AQI 37
Good
1.44μg/m³
PM2.5
5.25μg/m³
PM10
39.93ppb
O3
0.31ppb
SO2
15.56ppb
NO2
0.22ppm
CO
AQI 39
Good
1.44μg/m³
PM2.5
3.61μg/m³
PM10
41.77ppb
O3
0.31ppb
SO2
8.96ppb
NO2
0.22ppm
CO
AQI 35
Good
2.21μg/m³
PM2.5
9.28μg/m³
PM10
38.44ppb
O3
0.31ppb
SO2
17.98ppb
NO2
0.22ppm
CO
The air quality data for Washington, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Fort Lewis, Washington are available every hour.
Fort Lewis, Washington experienced its worst air quality at 03:00:00, 2026-03-05.
The best air quality in Fort Lewis, Washington was observed at 07:00:00 on 2026-03-05.
The air quality in Fort Lewis, Washington right now is Good, with an AQI of 37.
In Fort Lewis, Washington, O3 is the most frequently found pollutant.
When air quality in Fort Lewis, Washington is compromised, staying indoors and wearing a mask can reduce health risks.
Fort Lewis, Washington currently has a PM2.5 concentration of 1.608 μg/m3.
Fort Lewis, Washington currently has a PM10 concentration of 7.34 μg/m3.
The current carbon monoxide (CO) level in Fort Lewis, Washington is 0.243 ppm.
The current sulfur dioxide (SO2) concentration in Fort Lewis, Washington is 0.245 ppb.
Fort Lewis, Washington currently has an ozone (O3) concentration of 40.371 ppm.
The current level of nitrogen dioxide (NO2) in Fort Lewis, Washington is 15.929 ppb.
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