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)
20
Good
Fort Lewis, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.19 μg/m³
0
55
155
255
425
605+
22.03 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
2.71 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Fort Lewis, Washington
Fort Lewis, Washington
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AQI 24
Good
2.26μg/m³
PM2.5
9.54μg/m³
PM10
25.92ppb
O3
0.35ppb
SO2
1.70ppb
NO2
0.15ppm
CO
AQI 25
Good
2.04μg/m³
PM2.5
8.72μg/m³
PM10
27.11ppb
O3
0.35ppb
SO2
1.89ppb
NO2
0.15ppm
CO
AQI 27
Good
1.66μg/m³
PM2.5
7.20μg/m³
PM10
28.99ppb
O3
0.35ppb
SO2
1.93ppb
NO2
0.15ppm
CO
AQI 57
Moderate
1.57μg/m³
PM2.5
68.06μg/m³
PM10
27.96ppb
O3
0.35ppb
SO2
2.79ppb
NO2
0.15ppm
CO
AQI 19
Good
2.34μg/m³
PM2.5
15.63μg/m³
PM10
20.15ppb
O3
0.36ppb
SO2
3.02ppb
NO2
0.15ppm
CO
AQI 22
Good
2.57μg/m³
PM2.5
10.73μg/m³
PM10
24.36ppb
O3
0.35ppb
SO2
1.60ppb
NO2
0.15ppm
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 04:00:00, 2026-07-23.
The best air quality in Fort Lewis, Washington was observed at 04:00:00 on 2026-07-23.
The air quality in Fort Lewis, Washington right now is Good, with an AQI of 20.
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 2.441 μg/m3.
Fort Lewis, Washington currently has a PM10 concentration of 16.194 μg/m3.
The current carbon monoxide (CO) level in Fort Lewis, Washington is 0.154 ppm.
The current sulfur dioxide (SO2) concentration in Fort Lewis, Washington is 0.358 ppb.
Fort Lewis, Washington currently has an ozone (O3) concentration of 22.029 ppm.
The current level of nitrogen dioxide (NO2) in Fort Lewis, Washington is 2.709 ppb.
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