Stay updated with real-time air quality in Monmouth, Oregon 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)
24
Good
Monmouth, Oregon
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.12 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.79 μg/m³
0
55
155
255
425
605+
25.70 ppb
0
55
71
86
201
201+
0.22 ppb
0
36
76
186
605
1005+
6.99 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Monmouth, Oregon
Monmouth, Oregon
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AQI 23
Good
2.39μg/m³
PM2.5
9.12μg/m³
PM10
25.28ppb
O3
0.22ppb
SO2
4.63ppb
NO2
0.12ppm
CO
AQI 24
Good
2.19μg/m³
PM2.5
8.98μg/m³
PM10
26.09ppb
O3
0.22ppb
SO2
4.66ppb
NO2
0.12ppm
CO
AQI 25
Good
1.94μg/m³
PM2.5
7.84μg/m³
PM10
26.89ppb
O3
0.22ppb
SO2
4.62ppb
NO2
0.11ppm
CO
AQI 25
Good
1.91μg/m³
PM2.5
7.78μg/m³
PM10
26.86ppb
O3
0.22ppb
SO2
4.63ppb
NO2
0.11ppm
CO
AQI 25
Good
1.80μg/m³
PM2.5
7.47μg/m³
PM10
26.78ppb
O3
0.22ppb
SO2
4.68ppb
NO2
0.11ppm
CO
AQI 25
Good
1.70μg/m³
PM2.5
7.24μg/m³
PM10
26.91ppb
O3
0.22ppb
SO2
4.74ppb
NO2
0.11ppm
CO
Air quality measurements for Oregon, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Monmouth, Oregon is updated on an hourly basis.
The worst air quality in Monmouth, Oregon was recorded at 12:00:00 on 2025-10-26.
The best air quality in Monmouth, Oregon was recorded at 05:00:00 on 2025-10-26.
The real-time air quality index in Monmouth, Oregon is 24, currently categorized as Good.
The most common pollutant in Monmouth, Oregon is O3.
If the air quality in Monmouth, Oregon is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Monmouth, Oregon at present are 2.296 μg/m3.
The current PM10 levels in Monmouth, Oregon are 9.507 μg/m3.
The current carbon monoxide (CO) level in Monmouth, Oregon is 0.118 ppm.
The current sulfur dioxide (SO2) levels in Monmouth, Oregon are 0.22 ppb.
The current ozone (O3) levels at Monmouth, Oregon is 26.343 ppm.
The current nitrogen dioxide (NO2) levels at Monmouth, Oregon is 4.703 ppb.
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