Stay updated with real-time air quality in National City, California 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
National City, California
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.54 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.60 μg/m³
0
55
155
255
425
605+
23.78 ppb
0
55
71
86
201
201+
0.56 ppb
0
36
76
186
605
1005+
13.70 ppb
0
54
101
361
1250
2050+
0.33 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
National City, California
National City, California
Scroll To Air Quality MapLoading...
AQI 38
Good
7.28μg/m³
PM2.5
17.44μg/m³
PM10
25.64ppb
O3
0.56ppb
SO2
12.73ppb
NO2
0.33ppm
CO
AQI 38
Good
7.31μg/m³
PM2.5
18.30μg/m³
PM10
25.57ppb
O3
0.56ppb
SO2
12.75ppb
NO2
0.33ppm
CO
AQI 44
Good
7.70μg/m³
PM2.5
18.13μg/m³
PM10
22.13ppb
O3
0.57ppb
SO2
14.95ppb
NO2
0.33ppm
CO
AQI 44
Good
7.68μg/m³
PM2.5
18.68μg/m³
PM10
22.61ppb
O3
0.57ppb
SO2
14.53ppb
NO2
0.33ppm
CO
AQI 44
Good
7.58μg/m³
PM2.5
19.64μg/m³
PM10
23.64ppb
O3
0.56ppb
SO2
12.20ppb
NO2
0.33ppm
CO
AQI 44
Good
7.53μg/m³
PM2.5
23.50μg/m³
PM10
25.17ppb
O3
0.56ppb
SO2
13.10ppb
NO2
0.33ppm
CO
Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for National City, California is updated every hour for accuracy.
In the past 24 hours, the air quality in National City, California was at its worst at 06:00:00 on 2026-08-11.
In the last 24 hours, the best air quality in National City, California was observed at 09:00:00 on 2026-08-12.
As of now, the AQI in National City, California is 44, indicating Good conditions.
National City, California air has the highest levels of PM2.5.
Poor air quality in National City, California means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in National City, California are currently 7.538 μg/m3.
The PM10 concentration in National City, California is 18.601 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in National City, California is 0.329 ppm.
Currently, National City, California has a sulfur dioxide (SO2) concentration of 0.563 ppb.
The current ozone (O3) level in National City, California at the moment is 23.782 ppm.
Nitrogen dioxide (NO2) level in National City, California at the moment is 13.7 ppb.
All Rights Reserved © Ambee Inc. 2025