Stay updated with real-time air quality in St. Augustine, Florida 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
St. Augustine, Florida
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.97 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
24.33 μg/m³
0
55
155
255
425
605+
37.81 ppb
0
55
71
86
201
201+
2.67 ppb
0
36
76
186
605
1005+
8.11 ppb
0
54
101
361
1250
2050+
0.41 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
St. Augustine, Florida
St. Augustine, Florida
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AQI 41
Good
5.60μg/m³
PM2.5
44.34μg/m³
PM10
38.50ppb
O3
2.43ppb
SO2
8.12ppb
NO2
0.43ppm
CO
AQI 44
Good
7.68μg/m³
PM2.5
38.82μg/m³
PM10
39.02ppb
O3
2.63ppb
SO2
8.41ppb
NO2
0.44ppm
CO
AQI 44
Good
7.77μg/m³
PM2.5
31.61μg/m³
PM10
36.76ppb
O3
2.41ppb
SO2
8.76ppb
NO2
0.46ppm
CO
AQI 35
Good
4.40μg/m³
PM2.5
15.82μg/m³
PM10
38.23ppb
O3
2.49ppb
SO2
8.73ppb
NO2
0.39ppm
CO
AQI 33
Good
6.16μg/m³
PM2.5
28.97μg/m³
PM10
36.24ppb
O3
2.36ppb
SO2
8.11ppb
NO2
0.43ppm
CO
AQI 38
Good
7.11μg/m³
PM2.5
13.30μg/m³
PM10
36.45ppb
O3
2.42ppb
SO2
8.24ppb
NO2
0.46ppm
CO
Air quality measurements for Florida, 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 St. Augustine, Florida is updated on an hourly basis.
The worst air quality in St. Augustine, Florida was recorded at 02:00:00 on 2025-12-13.
The best air quality in St. Augustine, Florida was recorded at 06:00:00 on 2025-12-13.
The real-time air quality index in St. Augustine, Florida is 38, currently categorized as Good.
The most common pollutant in St. Augustine, Florida is PM2.5.
If the air quality in St. Augustine, Florida is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in St. Augustine, Florida at present are 6.969 μg/m3.
The current PM10 levels in St. Augustine, Florida are 24.327 μg/m3.
The current carbon monoxide (CO) level in St. Augustine, Florida is 0.406 ppm.
The current sulfur dioxide (SO2) levels in St. Augustine, Florida are 2.672 ppb.
The current ozone (O3) levels at St. Augustine, Florida is 37.81 ppm.
The current nitrogen dioxide (NO2) levels at St. Augustine, Florida is 8.105 ppb.
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