Stay updated with real-time air quality in Kelso, 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)
23
Good
Kelso, Washington
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.50 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.98 μg/m³
0
55
155
255
425
605+
25.27 ppb
0
55
71
86
201
201+
0.55 ppb
0
36
76
186
605
1005+
5.36 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Kelso, Washington
Kelso, Washington
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AQI 22
Good
3.60μg/m³
PM2.5
16.00μg/m³
PM10
22.28ppb
O3
0.74ppb
SO2
5.49ppb
NO2
0.19ppm
CO
AQI 22
Good
4.08μg/m³
PM2.5
17.64μg/m³
PM10
22.88ppb
O3
0.72ppb
SO2
5.81ppb
NO2
0.19ppm
CO
AQI 22
Good
4.22μg/m³
PM2.5
18.50μg/m³
PM10
22.24ppb
O3
0.72ppb
SO2
5.77ppb
NO2
0.19ppm
CO
AQI 27
Good
5.16μg/m³
PM2.5
26.00μg/m³
PM10
16.95ppb
O3
0.71ppb
SO2
5.89ppb
NO2
0.18ppm
CO
AQI 27
Good
4.91μg/m³
PM2.5
22.04μg/m³
PM10
18.88ppb
O3
0.71ppb
SO2
5.04ppb
NO2
0.17ppm
CO
AQI 22
Good
3.64μg/m³
PM2.5
15.59μg/m³
PM10
22.41ppb
O3
0.72ppb
SO2
5.26ppb
NO2
0.18ppm
CO
Air quality data and pollutant measurements for Washington, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Kelso, Washington is updated every hour.
The worst air quality in Kelso, Washington in the last 24 hours was observed at 04:00:00 on 2025-06-06.
In the last 24 hrs, the best air quality in Kelso, Washington was observed at 03:00:00 on 2025-06-06.
The current air quality in Kelso, Washington is 23, categorized as Good based on real-time data.
The most common pollutant in Kelso, Washington is O3.
If the air quality in Kelso, Washington is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Kelso, Washington is 3.505 μg/m3.
The current PM10 concentration at Kelso, Washington is 15.982 μg/m3.
The current carbon monoxide (CO) concentration at Kelso, Washington is 0.18 ppm.
The current sulfur dioxide (SO2) concentration at Kelso, Washington is 0.549 ppb.
The current ozone (O3) concentration at Kelso, Washington is 25.268 ppm.
The current nitrogen dioxide (NO2) concentration at Kelso, Washington is 5.359 ppb.
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