Stay updated with real-time air quality in Caldwell, 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)
54
Moderate
Caldwell, Idaho
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.87 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
60.87 μg/m³
0
55
155
255
425
605+
47.60 ppb
0
55
71
86
201
201+
3.60 ppb
0
36
76
186
605
1005+
3.04 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Caldwell, Idaho
Caldwell, Idaho
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AQI 44
Good
8.21μg/m³
PM2.5
34.78μg/m³
PM10
41.14ppb
O3
2.49ppb
SO2
7.10ppb
NO2
0.14ppm
CO
AQI 55
Moderate
10.55μg/m³
PM2.5
63.55μg/m³
PM10
40.25ppb
O3
0.82ppb
SO2
3.70ppb
NO2
0.14ppm
CO
AQI 52
Moderate
10.25μg/m³
PM2.5
46.65μg/m³
PM10
40.51ppb
O3
2.02ppb
SO2
3.68ppb
NO2
0.14ppm
CO
AQI 74
Moderate
9.43μg/m³
PM2.5
101.89μg/m³
PM10
40.09ppb
O3
0.86ppb
SO2
3.68ppb
NO2
0.14ppm
CO
AQI 85
Moderate
9.59μg/m³
PM2.5
123.32μg/m³
PM10
40.03ppb
O3
0.87ppb
SO2
3.68ppb
NO2
0.14ppm
CO
AQI 53
Moderate
8.87μg/m³
PM2.5
59.29μg/m³
PM10
38.37ppb
O3
0.80ppb
SO2
3.68ppb
NO2
0.14ppm
CO
Air quality data and pollutant measurements for Idaho, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Caldwell, Idaho is updated every hour.
The worst air quality in Caldwell, Idaho in the last 24 hours was observed at 07:00:00 on 2026-10-07.
In the last 24 hrs, the best air quality in Caldwell, Idaho was observed at 03:00:00 on 2026-10-07.
The current air quality in Caldwell, Idaho is 44, categorized as Good based on real-time data.
The most common pollutant in Caldwell, Idaho is O3.
If the air quality in Caldwell, Idaho is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Caldwell, Idaho is 7.358 μg/m3.
The current PM10 concentration at Caldwell, Idaho is 34.473 μg/m3.
The current carbon monoxide (CO) concentration at Caldwell, Idaho is 0.121 ppm.
The current sulfur dioxide (SO2) concentration at Caldwell, Idaho is 1.856 ppb.
The current ozone (O3) concentration at Caldwell, Idaho is 46.754 ppm.
The current nitrogen dioxide (NO2) concentration at Caldwell, Idaho is 4.06 ppb.
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