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)
49
Good
St. Augustine, Florida
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
30.17 μg/m³
0
55
155
255
425
605+
27.58 ppb
0
55
71
86
201
201+
1.85 ppb
0
36
76
186
605
1005+
9.19 ppb
0
54
101
361
1250
2050+
0.40 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 38
Good
6.76μg/m³
PM2.5
37.97μg/m³
PM10
29.87ppb
O3
1.72ppb
SO2
7.77ppb
NO2
0.41ppm
CO
AQI 38
Good
6.89μg/m³
PM2.5
20.84μg/m³
PM10
25.77ppb
O3
1.74ppb
SO2
7.79ppb
NO2
0.41ppm
CO
AQI 44
Good
7.90μg/m³
PM2.5
32.60μg/m³
PM10
31.09ppb
O3
1.73ppb
SO2
9.36ppb
NO2
0.41ppm
CO
AQI 33
Good
6.01μg/m³
PM2.5
16.32μg/m³
PM10
33.38ppb
O3
1.82ppb
SO2
7.19ppb
NO2
0.43ppm
CO
AQI 33
Good
6.22μg/m³
PM2.5
21.63μg/m³
PM10
29.87ppb
O3
1.74ppb
SO2
7.99ppb
NO2
0.41ppm
CO
AQI 38
Good
6.63μg/m³
PM2.5
15.47μg/m³
PM10
29.63ppb
O3
1.79ppb
SO2
8.88ppb
NO2
0.41ppm
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 03:00:00 on 2025-07-19.
The best air quality in St. Augustine, Florida was recorded at 01:00:00 on 2025-07-20.
The real-time air quality index in St. Augustine, Florida is 44, 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 8.072 μg/m3.
The current PM10 levels in St. Augustine, Florida are 36.29 μg/m3.
The current carbon monoxide (CO) level in St. Augustine, Florida is 0.396 ppm.
The current sulfur dioxide (SO2) levels in St. Augustine, Florida are 1.665 ppb.
The current ozone (O3) levels at St. Augustine, Florida is 28.012 ppm.
The current nitrogen dioxide (NO2) levels at St. Augustine, Florida is 5.879 ppb.
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