Stay updated with real-time air quality in Centralia, 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)
22
Good
Centralia, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.59 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.50 μg/m³
0
55
155
255
425
605+
24.05 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
2.83 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Centralia, Washington
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AQI 21
Good
1.47μg/m³
PM2.5
6.13μg/m³
PM10
23.27ppb
O3
0.37ppb
SO2
3.02ppb
NO2
0.14ppm
CO
AQI 21
Good
1.45μg/m³
PM2.5
6.03μg/m³
PM10
23.25ppb
O3
0.37ppb
SO2
3.03ppb
NO2
0.14ppm
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 21
Good
1.23μg/m³
PM2.5
5.13μg/m³
PM10
23.05ppb
O3
0.37ppb
SO2
3.06ppb
NO2
0.14ppm
CO
AQI 20
Good
2.44μg/m³
PM2.5
16.19μg/m³
PM10
22.03ppb
O3
0.36ppb
SO2
2.71ppb
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
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 Centralia, Washington is updated every hour for accuracy.
In the past 24 hours, the air quality in Centralia, Washington was at its worst at 12:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Centralia, Washington was observed at 08:00:00 on 2026-07-23.
As of now, the AQI in Centralia, Washington is 22, indicating Good conditions.
Centralia, Washington air has the highest levels of O3.
Poor air quality in Centralia, Washington means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Centralia, Washington are currently 3.588 μg/m3.
The PM10 concentration in Centralia, Washington is 15.502 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Centralia, Washington is 0.144 ppm.
Currently, Centralia, Washington has a sulfur dioxide (SO2) concentration of 0.365 ppb.
The current ozone (O3) level in Centralia, Washington at the moment is 24.047 ppm.
Nitrogen dioxide (NO2) level in Centralia, Washington at the moment is 2.825 ppb.
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