Washington, USA live air quality index now
Stay updated with real-time air quality in Washington, USA 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)
49
Good
Washington, USA
Last updated: ... (Local time)
Major air pollutants in Washington, USA
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
8.70 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
34.19 μg/m³
0
55
155
255
425
605+
Ozone (O3)
31.26 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.31 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
5.68 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Washington, USA
Washington, USA
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Air quality in cities of Washington, USA
| No results found | |||||||
| City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
|---|---|---|---|---|---|---|---|
Air quality in nearby states
Oregon, USA
AQI 44
Good
7.90μg/m³
PM2.5
36.03μg/m³
PM10
30.29ppb
O3
0.44ppb
SO2
7.07ppb
NO2
0.17ppm
CO
Idaho, USA
AQI 54
Moderate
10.57μg/m³
PM2.5
39.35μg/m³
PM10
45.49ppb
O3
1.18ppb
SO2
1.75ppb
NO2
0.14ppm
CO
Montana, USA
AQI 38
Good
7.45μg/m³
PM2.5
31.80μg/m³
PM10
41.38ppb
O3
1.24ppb
SO2
1.28ppb
NO2
0.14ppm
CO
Utah, USA
AQI 54
Moderate
11.09μg/m³
PM2.5
39.94μg/m³
PM10
55.79ppb
O3
0.81ppb
SO2
2.72ppb
NO2
0.16ppm
CO
Nevada, USA
AQI 48
Good
6.87μg/m³
PM2.5
18.47μg/m³
PM10
51.71ppb
O3
0.47ppb
SO2
3.25ppb
NO2
0.17ppm
CO
Wyoming, USA
AQI 43
Good
4.67μg/m³
PM2.5
18.65μg/m³
PM10
46.18ppb
O3
0.95ppb
SO2
1.18ppb
NO2
0.14ppm
CO
How accurate is Washington, USA air quality data?
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
Frequently asked questions
How often is the air quality data for Washington, USA updated?
The air quality for Washington, USA is updated every hour.
When was the worst air quality at Washington, USA in the last 24 hrs?
The worst air quality in Washington, USA in the last 24 hours was observed at 11:00:00 on 2025-08-30.
When was the best air quality at Washington, USA in the last 24 hrs?
In the last 24 hrs, the best air quality in Washington, USA was observed at 03:00:00 on 2025-08-30.
What is the current air quality in Washington, USA?
The current air quality in Washington, USA is 44, categorized as Good based on real-time data.
What pollutant is the most common in Washington, USA?
The most common pollutant in Washington, USA is PM2.5.
What should I do if the air quality in Washington, USA is poor?
If the air quality in Washington, USA is poor, consider staying indoors and wearing a mask to protect yourself.
What is the current concentration of PM2.5 in Washington, USA?
The current PM2.5 concentration at Washington, USA is 7.737 μg/m3.
What is the current concentration of PM10 in Washington, USA?
The current PM10 concentration at Washington, USA is 32.17 μg/m3.
What is the current concentration of carbon monoxide (CO) in Washington, USA?
The current carbon monoxide (CO) concentration at Washington, USA is 0.217 ppm.
What is the current concentration of sulfur dioxide (SO2) in Washington, USA?
The current sulfur dioxide (SO2) concentration at Washington, USA is 0.291 ppb.
What is the current concentration of ozone (O3) in Washington, USA?
The current ozone (O3) concentration at Washington, USA is 28.938 ppm.
What is the current concentration of nitrogen dioxide (NO2) in Washington, USA?
The current nitrogen dioxide (NO2) concentration at Washington, USA is 8.767 ppb.
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