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)
44
Good
Lewiston, Idaho
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.93 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
35.31 μg/m³
0
55
155
255
425
605+
39.43 ppb
0
55
71
86
201
201+
0.57 ppb
0
36
76
186
605
1005+
1.86 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Lewiston, Idaho
Lewiston, Idaho
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AQI 36
Good
2.17μg/m³
PM2.5
10.88μg/m³
PM10
39.05ppb
O3
0.58ppb
SO2
1.71ppb
NO2
0.12ppm
CO
AQI 36
Good
1.70μg/m³
PM2.5
7.02μg/m³
PM10
39.19ppb
O3
0.54ppb
SO2
1.89ppb
NO2
0.12ppm
CO
AQI 35
Good
2.70μg/m³
PM2.5
10.99μg/m³
PM10
37.73ppb
O3
0.48ppb
SO2
3.17ppb
NO2
0.14ppm
CO
AQI 38
Good
1.41μg/m³
PM2.5
8.99μg/m³
PM10
40.74ppb
O3
0.60ppb
SO2
1.83ppb
NO2
0.12ppm
CO
AQI 36
Good
0.97μg/m³
PM2.5
4.33μg/m³
PM10
39.36ppb
O3
0.61ppb
SO2
1.68ppb
NO2
0.12ppm
CO
AQI 34
Good
1.37μg/m³
PM2.5
5.95μg/m³
PM10
37.32ppb
O3
0.61ppb
SO2
1.54ppb
NO2
0.12ppm
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 09:00:00 on 2026-06-13.
The best air quality in Lewiston, Idaho was recorded at 01:00:00 on 2026-06-13.
The real-time air quality index in Lewiston, Idaho is 44, 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 7.934 μg/m3.
The current PM10 levels in Lewiston, Idaho are 35.31 μg/m3.
The current carbon monoxide (CO) level in Lewiston, Idaho is 0.12 ppm.
The current sulfur dioxide (SO2) levels in Lewiston, Idaho are 0.573 ppb.
The current ozone (O3) levels at Lewiston, Idaho is 39.43 ppm.
The current nitrogen dioxide (NO2) levels at Lewiston, Idaho is 1.856 ppb.
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