Stay updated with real-time air quality in Monroe, 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)
25
Good
Monroe, Washington
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.98 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.38 μg/m³
0
55
155
255
425
605+
27.38 ppb
0
55
71
86
201
201+
0.60 ppb
0
36
76
186
605
1005+
8.70 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Monroe, Washington
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AQI 33
Good
5.82μg/m³
PM2.5
27.71μg/m³
PM10
27.59ppb
O3
1.23ppb
SO2
9.60ppb
NO2
0.17ppm
CO
AQI 26
Good
4.33μg/m³
PM2.5
12.42μg/m³
PM10
27.64ppb
O3
1.24ppb
SO2
9.17ppb
NO2
0.17ppm
CO
AQI 26
Good
3.38μg/m³
PM2.5
14.48μg/m³
PM10
27.91ppb
O3
1.23ppb
SO2
9.53ppb
NO2
0.17ppm
CO
AQI 26
Good
3.92μg/m³
PM2.5
15.98μg/m³
PM10
27.82ppb
O3
1.24ppb
SO2
8.89ppb
NO2
0.18ppm
CO
AQI 27
Good
4.46μg/m³
PM2.5
18.26μg/m³
PM10
29.28ppb
O3
1.27ppb
SO2
8.24ppb
NO2
0.18ppm
CO
AQI 26
Good
3.48μg/m³
PM2.5
9.97μg/m³
PM10
27.78ppb
O3
1.22ppb
SO2
8.70ppb
NO2
0.17ppm
CO
The air quality data for Washington, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Monroe, Washington are available every hour.
Monroe, Washington experienced its worst air quality at 07:00:00, 2025-06-06.
The best air quality in Monroe, Washington was observed at 03:00:00 on 2025-06-06.
The air quality in Monroe, Washington right now is Good, with an AQI of 25.
In Monroe, Washington, O3 is the most frequently found pollutant.
When air quality in Monroe, Washington is compromised, staying indoors and wearing a mask can reduce health risks.
Monroe, Washington currently has a PM2.5 concentration of 3.983 μg/m3.
Monroe, Washington currently has a PM10 concentration of 22.381 μg/m3.
The current carbon monoxide (CO) level in Monroe, Washington is 0.142 ppm.
The current sulfur dioxide (SO2) concentration in Monroe, Washington is 0.6 ppb.
Monroe, Washington currently has an ozone (O3) concentration of 27.383 ppm.
The current level of nitrogen dioxide (NO2) in Monroe, Washington is 8.704 ppb.
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