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)
31
Good
Monroe, Washington
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.75 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.56 μg/m³
0
55
155
255
425
605+
33.82 ppb
0
55
71
86
201
201+
0.46 ppb
0
36
76
186
605
1005+
7.56 ppb
0
54
101
361
1250
2050+
0.11 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Monroe, Washington
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AQI 27
Good
4.90μg/m³
PM2.5
12.92μg/m³
PM10
28.47ppb
O3
0.47ppb
SO2
3.72ppb
NO2
0.10ppm
CO
AQI 27
Good
5.10μg/m³
PM2.5
23.25μg/m³
PM10
28.18ppb
O3
0.47ppb
SO2
2.70ppb
NO2
0.10ppm
CO
AQI 31
Good
3.86μg/m³
PM2.5
15.59μg/m³
PM10
33.65ppb
O3
0.47ppb
SO2
3.92ppb
NO2
0.10ppm
CO
AQI 27
Good
5.39μg/m³
PM2.5
23.26μg/m³
PM10
27.30ppb
O3
0.48ppb
SO2
3.69ppb
NO2
0.10ppm
CO
AQI 28
Good
4.77μg/m³
PM2.5
14.86μg/m³
PM10
30.34ppb
O3
0.47ppb
SO2
4.05ppb
NO2
0.10ppm
CO
AQI 27
Good
4.78μg/m³
PM2.5
13.17μg/m³
PM10
29.34ppb
O3
0.47ppb
SO2
4.03ppb
NO2
0.10ppm
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 06:00:00, 2025-07-22.
The best air quality in Monroe, Washington was observed at 05:00:00 on 2025-07-22.
The air quality in Monroe, Washington right now is Good, with an AQI of 31.
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 4.037 μg/m3.
Monroe, Washington currently has a PM10 concentration of 24.876 μg/m3.
The current carbon monoxide (CO) level in Monroe, Washington is 0.1 ppm.
The current sulfur dioxide (SO2) concentration in Monroe, Washington is 0.469 ppb.
Monroe, Washington currently has an ozone (O3) concentration of 33.621 ppm.
The current level of nitrogen dioxide (NO2) in Monroe, Washington is 4.181 ppb.
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