Stay updated with real-time air quality in Lewiston, Idaho 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)
27
Good
Lewiston, Idaho
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.14 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.78 μg/m³
0
55
155
255
425
605+
18.76 ppb
0
55
71
86
201
201+
3.72 ppb
0
36
76
186
605
1005+
1.86 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Lewiston, Idaho
Lewiston, Idaho
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AQI 27
Good
4.73μg/m³
PM2.5
20.26μg/m³
PM10
12.91ppb
O3
2.72ppb
SO2
3.53ppb
NO2
0.29ppm
CO
AQI 16
Good
3.00μg/m³
PM2.5
12.01μg/m³
PM10
11.90ppb
O3
2.72ppb
SO2
6.53ppb
NO2
0.29ppm
CO
AQI 54
Moderate
10.58μg/m³
PM2.5
46.95μg/m³
PM10
5.21ppb
O3
2.51ppb
SO2
5.42ppb
NO2
0.34ppm
CO
AQI 33
Good
5.50μg/m³
PM2.5
35.95μg/m³
PM10
9.76ppb
O3
2.78ppb
SO2
5.26ppb
NO2
0.23ppm
CO
AQI 69
Moderate
19.27μg/m³
PM2.5
77.73μg/m³
PM10
14.24ppb
O3
2.75ppb
SO2
5.36ppb
NO2
0.24ppm
CO
AQI 60
Moderate
14.10μg/m³
PM2.5
62.38μg/m³
PM10
15.08ppb
O3
2.73ppb
SO2
8.02ppb
NO2
0.24ppm
CO
Air quality measurements for Idaho, 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 Lewiston, Idaho is updated on an hourly basis.
The worst air quality in Lewiston, Idaho was recorded at 04:00:00 on 2025-11-10.
The best air quality in Lewiston, Idaho was recorded at 05:00:00 on 2025-11-10.
The real-time air quality index in Lewiston, Idaho is 22, currently categorized as Good.
The most common pollutant in Lewiston, Idaho is PM2.5.
If the air quality in Lewiston, Idaho is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Lewiston, Idaho at present are 3.897 μg/m3.
The current PM10 levels in Lewiston, Idaho are 16.989 μg/m3.
The current carbon monoxide (CO) level in Lewiston, Idaho is 0.293 ppm.
The current sulfur dioxide (SO2) levels in Lewiston, Idaho are 2.609 ppb.
The current ozone (O3) levels at Lewiston, Idaho is 6.158 ppm.
The current nitrogen dioxide (NO2) levels at Lewiston, Idaho is 4.548 ppb.
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