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)
33
Good
St. Augustine, Florida
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.69 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.66 μg/m³
0
55
155
255
425
605+
9.38 ppb
0
55
71
86
201
201+
0.54 ppb
0
36
76
186
605
1005+
9.62 ppb
0
54
101
361
1250
2050+
0.48 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 27
Good
4.95μg/m³
PM2.5
20.31μg/m³
PM10
19.79ppb
O3
0.56ppb
SO2
7.94ppb
NO2
0.49ppm
CO
AQI 27
Good
4.95μg/m³
PM2.5
21.14μg/m³
PM10
19.46ppb
O3
0.58ppb
SO2
7.91ppb
NO2
0.49ppm
CO
AQI 33
Good
5.58μg/m³
PM2.5
24.86μg/m³
PM10
9.44ppb
O3
0.58ppb
SO2
7.60ppb
NO2
0.49ppm
CO
AQI 22
Good
4.24μg/m³
PM2.5
16.51μg/m³
PM10
11.50ppb
O3
0.67ppb
SO2
8.04ppb
NO2
0.48ppm
CO
AQI 27
Good
4.74μg/m³
PM2.5
21.14μg/m³
PM10
15.24ppb
O3
0.56ppb
SO2
7.89ppb
NO2
0.49ppm
CO
AQI 27
Good
5.17μg/m³
PM2.5
21.81μg/m³
PM10
10.91ppb
O3
0.57ppb
SO2
7.94ppb
NO2
0.49ppm
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 04:00:00 on 2026-09-06.
The best air quality in St. Augustine, Florida was recorded at 09:00:00 on 2026-09-07.
The real-time air quality index in St. Augustine, Florida is 33, 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 5.689 μg/m3.
The current PM10 levels in St. Augustine, Florida are 22.665 μg/m3.
The current carbon monoxide (CO) level in St. Augustine, Florida is 0.483 ppm.
The current sulfur dioxide (SO2) levels in St. Augustine, Florida are 0.542 ppb.
The current ozone (O3) levels at St. Augustine, Florida is 9.379 ppm.
The current nitrogen dioxide (NO2) levels at St. Augustine, Florida is 9.617 ppb.
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