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)
49
Good
Lewiston, Idaho
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.14 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
40.73 μg/m³
0
55
155
255
425
605+
24.62 ppb
0
55
71
86
201
201+
0.89 ppb
0
36
76
186
605
1005+
7.05 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Lewiston, Idaho
Lewiston, Idaho
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AQI 19
Good
2.66μg/m³
PM2.5
11.22μg/m³
PM10
21.28ppb
O3
1.17ppb
SO2
10.20ppb
NO2
0.33ppm
CO
AQI 27
Good
4.80μg/m³
PM2.5
20.99μg/m³
PM10
22.83ppb
O3
1.17ppb
SO2
10.34ppb
NO2
0.33ppm
CO
AQI 27
Good
4.69μg/m³
PM2.5
20.96μg/m³
PM10
23.70ppb
O3
0.99ppb
SO2
11.11ppb
NO2
0.20ppm
CO
AQI 33
Good
5.81μg/m³
PM2.5
25.34μg/m³
PM10
23.56ppb
O3
1.44ppb
SO2
16.29ppb
NO2
0.32ppm
CO
AQI 22
Good
4.36μg/m³
PM2.5
18.91μg/m³
PM10
20.43ppb
O3
1.49ppb
SO2
19.88ppb
NO2
0.33ppm
CO
AQI 33
Good
5.68μg/m³
PM2.5
24.44μg/m³
PM10
21.63ppb
O3
1.48ppb
SO2
13.21ppb
NO2
0.34ppm
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 07:00:00 on 2026-10-05.
The best air quality in Lewiston, Idaho was recorded at 11:00:00 on 2026-10-06.
The real-time air quality index in Lewiston, Idaho is 49, 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 9.054 μg/m3.
The current PM10 levels in Lewiston, Idaho are 40.359 μg/m3.
The current carbon monoxide (CO) level in Lewiston, Idaho is 0.332 ppm.
The current sulfur dioxide (SO2) levels in Lewiston, Idaho are 1.097 ppb.
The current ozone (O3) levels at Lewiston, Idaho is 20.677 ppm.
The current nitrogen dioxide (NO2) levels at Lewiston, Idaho is 10.276 ppb.
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