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
5.81 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.29 μg/m³
0
55
155
255
425
605+
27.70 ppb
0
55
71
86
201
201+
0.57 ppb
0
36
76
186
605
1005+
6.53 ppb
0
54
101
361
1250
2050+
0.38 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
St. Augustine, Florida
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AQI 22
Good
3.85μg/m³
PM2.5
16.96μg/m³
PM10
19.32ppb
O3
0.40ppb
SO2
3.65ppb
NO2
0.15ppm
CO
AQI 19
Good
3.45μg/m³
PM2.5
15.02μg/m³
PM10
20.64ppb
O3
0.32ppb
SO2
2.89ppb
NO2
0.14ppm
CO
AQI 22
Good
4.34μg/m³
PM2.5
18.98μg/m³
PM10
20.33ppb
O3
0.35ppb
SO2
3.02ppb
NO2
0.14ppm
CO
AQI 24
Good
2.97μg/m³
PM2.5
12.00μg/m³
PM10
25.78ppb
O3
0.14ppb
SO2
1.33ppb
NO2
0.12ppm
CO
AQI 38
Good
6.55μg/m³
PM2.5
29.05μg/m³
PM10
16.49ppb
O3
0.46ppb
SO2
3.92ppb
NO2
0.15ppm
CO
AQI 44
Good
7.81μg/m³
PM2.5
34.07μg/m³
PM10
14.10ppb
O3
0.45ppb
SO2
3.92ppb
NO2
0.15ppm
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 11:00:00 on 2026-03-03.
The best air quality in St. Augustine, Florida was recorded at 03:00:00 on 2026-03-04.
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 5.813 μg/m3.
The current PM10 levels in St. Augustine, Florida are 22.288 μg/m3.
The current carbon monoxide (CO) level in St. Augustine, Florida is 0.384 ppm.
The current sulfur dioxide (SO2) levels in St. Augustine, Florida are 0.566 ppb.
The current ozone (O3) levels at St. Augustine, Florida is 27.703 ppm.
The current nitrogen dioxide (NO2) levels at St. Augustine, Florida is 6.531 ppb.
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