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)
27
Good
Caldwell, Idaho
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
3.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.47 μg/m³
0
55
155
255
425
605+
29.08 ppb
0
55
71
86
201
201+
3.86 ppb
0
36
76
186
605
1005+
5.33 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Caldwell, Idaho
Caldwell, Idaho
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AQI 33
Good
5.78μg/m³
PM2.5
31.07μg/m³
PM10
13.89ppb
O3
4.42ppb
SO2
13.32ppb
NO2
0.38ppm
CO
AQI 44
Good
7.56μg/m³
PM2.5
19.94μg/m³
PM10
13.87ppb
O3
4.43ppb
SO2
13.30ppb
NO2
0.38ppm
CO
AQI 33
Good
5.84μg/m³
PM2.5
19.35μg/m³
PM10
13.49ppb
O3
4.45ppb
SO2
12.83ppb
NO2
0.38ppm
CO
AQI 33
Good
5.67μg/m³
PM2.5
23.54μg/m³
PM10
12.19ppb
O3
4.47ppb
SO2
10.40ppb
NO2
0.38ppm
CO
AQI 33
Good
5.78μg/m³
PM2.5
18.47μg/m³
PM10
13.84ppb
O3
4.49ppb
SO2
10.44ppb
NO2
0.38ppm
CO
AQI 27
Good
4.97μg/m³
PM2.5
27.46μg/m³
PM10
13.40ppb
O3
4.45ppb
SO2
10.56ppb
NO2
0.38ppm
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 09:00:00 on 2025-10-19.
In the last 24 hrs, the best air quality in Caldwell, Idaho was observed at 01:00:00 on 2025-10-20.
The current air quality in Caldwell, Idaho is 27, categorized as Good based on real-time data.
The most common pollutant in Caldwell, Idaho is PM2.5.
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 4.648 μg/m3.
The current PM10 concentration at Caldwell, Idaho is 17.093 μg/m3.
The current carbon monoxide (CO) concentration at Caldwell, Idaho is 0.44 ppm.
The current sulfur dioxide (SO2) concentration at Caldwell, Idaho is 5.057 ppb.
The current ozone (O3) concentration at Caldwell, Idaho is 20.654 ppm.
The current nitrogen dioxide (NO2) concentration at Caldwell, Idaho is 9.516 ppb.
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