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)
30
Good
Yelm, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.28 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.82 μg/m³
0
55
155
255
425
605+
31.75 ppb
0
55
71
86
201
201+
0.10 ppb
0
36
76
186
605
1005+
5.15 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Very high
Yelm, Washington
Yelm, Washington
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AQI 25
Good
2.31μg/m³
PM2.5
8.84μg/m³
PM10
27.31ppb
O3
0.16ppb
SO2
6.27ppb
NO2
0.14ppm
CO
AQI 25
Good
1.20μg/m³
PM2.5
5.01μg/m³
PM10
27.03ppb
O3
0.16ppb
SO2
5.99ppb
NO2
0.15ppm
CO
AQI 27
Good
2.17μg/m³
PM2.5
10.70μg/m³
PM10
28.69ppb
O3
0.14ppb
SO2
6.21ppb
NO2
0.14ppm
CO
AQI 26
Good
1.49μg/m³
PM2.5
6.03μg/m³
PM10
28.21ppb
O3
0.14ppb
SO2
7.20ppb
NO2
0.13ppm
CO
AQI 25
Good
1.21μg/m³
PM2.5
5.04μg/m³
PM10
27.39ppb
O3
0.16ppb
SO2
5.96ppb
NO2
0.15ppm
CO
AQI 25
Good
1.22μg/m³
PM2.5
5.09μg/m³
PM10
27.38ppb
O3
0.16ppb
SO2
5.95ppb
NO2
0.15ppm
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 01:00:00 on 2026-04-22.
In the last 24 hours, the best air quality in Yelm, Washington was observed at 06:00:00 on 2026-04-21.
As of now, the AQI in Yelm, Washington is 27, 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 2.046 μg/m3.
The PM10 concentration in Yelm, Washington is 9.859 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Yelm, Washington is 0.153 ppm.
Currently, Yelm, Washington has a sulfur dioxide (SO2) concentration of 0.158 ppb.
The current ozone (O3) level in Yelm, Washington at the moment is 28.822 ppm.
Nitrogen dioxide (NO2) level in Yelm, Washington at the moment is 5.963 ppb.
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