Stay updated with real-time air quality in Smithfield, North Carolina 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)
36
Good
Smithfield, North Carolina
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.82 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
31.26 μg/m³
0
55
155
255
425
605+
38.82 ppb
0
55
71
86
201
201+
0.56 ppb
0
36
76
186
605
1005+
2.04 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Smithfield, North Carolina
Smithfield, North Carolina
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AQI 36
Good
6.32μg/m³
PM2.5
28.39μg/m³
PM10
39.33ppb
O3
0.50ppb
SO2
2.10ppb
NO2
0.19ppm
CO
AQI 37
Good
3.65μg/m³
PM2.5
11.99μg/m³
PM10
39.60ppb
O3
0.45ppb
SO2
2.04ppb
NO2
0.18ppm
CO
AQI 39
Good
4.24μg/m³
PM2.5
12.87μg/m³
PM10
41.77ppb
O3
0.29ppb
SO2
2.20ppb
NO2
0.19ppm
CO
AQI 38
Good
4.16μg/m³
PM2.5
16.71μg/m³
PM10
40.95ppb
O3
0.23ppb
SO2
2.11ppb
NO2
0.20ppm
CO
AQI 36
Good
3.71μg/m³
PM2.5
12.63μg/m³
PM10
38.83ppb
O3
0.69ppb
SO2
1.99ppb
NO2
0.16ppm
CO
AQI 39
Good
3.86μg/m³
PM2.5
14.62μg/m³
PM10
41.56ppb
O3
0.21ppb
SO2
2.29ppb
NO2
0.20ppm
CO
Air quality measurements for North Carolina, 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 Smithfield, North Carolina is updated on an hourly basis.
The worst air quality in Smithfield, North Carolina was recorded at 07:00:00 on 2026-10-22.
The best air quality in Smithfield, North Carolina was recorded at 02:00:00 on 2026-10-22.
The real-time air quality index in Smithfield, North Carolina is 36, currently categorized as Good.
The most common pollutant in Smithfield, North Carolina is O3.
If the air quality in Smithfield, North Carolina is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Smithfield, North Carolina at present are 5.817 μg/m3.
The current PM10 levels in Smithfield, North Carolina are 31.262 μg/m3.
The current carbon monoxide (CO) level in Smithfield, North Carolina is 0.198 ppm.
The current sulfur dioxide (SO2) levels in Smithfield, North Carolina are 0.562 ppb.
The current ozone (O3) levels at Smithfield, North Carolina is 38.822 ppm.
The current nitrogen dioxide (NO2) levels at Smithfield, North Carolina is 2.041 ppb.
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