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)
38
Good
Smithfield, North Carolina
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.80 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.88 μg/m³
0
55
155
255
425
605+
36.93 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
4.87 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Smithfield, North Carolina
Scroll To Air Quality MapLoading...
AQI 38
Good
7.36μg/m³
PM2.5
32.13μg/m³
PM10
36.97ppb
O3
0.91ppb
SO2
5.22ppb
NO2
0.25ppm
CO
AQI 36
Good
5.89μg/m³
PM2.5
13.61μg/m³
PM10
38.79ppb
O3
0.90ppb
SO2
5.30ppb
NO2
0.24ppm
CO
AQI 37
Good
5.08μg/m³
PM2.5
10.46μg/m³
PM10
39.90ppb
O3
0.88ppb
SO2
5.43ppb
NO2
0.25ppm
CO
AQI 33
Good
5.24μg/m³
PM2.5
16.31μg/m³
PM10
36.24ppb
O3
0.87ppb
SO2
5.02ppb
NO2
0.23ppm
CO
AQI 44
Good
7.63μg/m³
PM2.5
28.14μg/m³
PM10
36.79ppb
O3
1.02ppb
SO2
4.99ppb
NO2
0.22ppm
CO
AQI 34
Good
5.11μg/m³
PM2.5
15.36μg/m³
PM10
36.63ppb
O3
0.86ppb
SO2
5.82ppb
NO2
0.26ppm
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 03:00:00 on 2026-03-09.
The best air quality in Smithfield, North Carolina was recorded at 10:00:00 on 2026-03-09.
The real-time air quality index in Smithfield, North Carolina is 38, currently categorized as Good.
The most common pollutant in Smithfield, North Carolina is PM2.5.
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 6.802 μg/m3.
The current PM10 levels in Smithfield, North Carolina are 27.883 μg/m3.
The current carbon monoxide (CO) level in Smithfield, North Carolina is 0.196 ppm.
The current sulfur dioxide (SO2) levels in Smithfield, North Carolina are 0.63 ppb.
The current ozone (O3) levels at Smithfield, North Carolina is 36.928 ppm.
The current nitrogen dioxide (NO2) levels at Smithfield, North Carolina is 4.867 ppb.
All Rights Reserved © Ambee Inc. 2025