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

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.92 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.45 μg/m³
0
55
155
255
425
605+
22.09 ppb
0
55
71
86
201
201+
0.35 ppb
0
36
76
186
605
1005+
5.94 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Yelm, Washington
Yelm, Washington
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AQI 19
Good
3.28μg/m³
PM2.5
12.85μg/m³
PM10
21.05ppb
O3
0.37ppb
SO2
5.03ppb
NO2
0.10ppm
CO
AQI 23
Good
2.11μg/m³
PM2.5
9.05μg/m³
PM10
24.85ppb
O3
0.34ppb
SO2
4.62ppb
NO2
0.10ppm
CO
AQI 19
Good
3.31μg/m³
PM2.5
14.41μg/m³
PM10
21.19ppb
O3
0.38ppb
SO2
4.96ppb
NO2
0.10ppm
CO
AQI 19
Good
3.36μg/m³
PM2.5
14.52μg/m³
PM10
19.63ppb
O3
0.40ppb
SO2
5.35ppb
NO2
0.10ppm
CO
AQI 22
Good
2.12μg/m³
PM2.5
9.14μg/m³
PM10
23.76ppb
O3
0.34ppb
SO2
4.53ppb
NO2
0.10ppm
CO
AQI 22
Good
2.09μg/m³
PM2.5
9.00μg/m³
PM10
23.87ppb
O3
0.34ppb
SO2
4.53ppb
NO2
0.10ppm
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 Yelm, Washington is updated every hour for accuracy.
In the past 24 hours, the air quality in Yelm, Washington was at its worst at 02:00:00 on 2026-10-08.
In the last 24 hours, the best air quality in Yelm, Washington was observed at 03:00:00 on 2026-10-09.
As of now, the AQI in Yelm, Washington is 20, indicating Good conditions.
Yelm, Washington air has the highest levels of O3.
Poor air quality in Yelm, Washington means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Yelm, Washington are currently 2.404 μg/m3.
The PM10 concentration in Yelm, Washington is 11.952 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Yelm, Washington is 0.1 ppm.
Currently, Yelm, Washington has a sulfur dioxide (SO2) concentration of 0.341 ppb.
The current ozone (O3) level in Yelm, Washington at the moment is 22.01 ppm.
Nitrogen dioxide (NO2) level in Yelm, Washington at the moment is 4.663 ppb.
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