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

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.23 μg/m³
0
55
155
255
425
605+
41.88 ppb
0
55
71
86
201
201+
0.59 ppb
0
36
76
186
605
1005+
8.14 ppb
0
54
101
361
1250
2050+
0.40 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Port St. John, Florida
Port St. John, Florida
Scroll To Air Quality MapLoading...
AQI 44
Good
8.08μg/m³
PM2.5
28.79μg/m³
PM10
43.89ppb
O3
0.66ppb
SO2
6.42ppb
NO2
0.39ppm
CO
AQI 44
Good
7.87μg/m³
PM2.5
28.16μg/m³
PM10
44.24ppb
O3
0.66ppb
SO2
6.42ppb
NO2
0.40ppm
CO
AQI 44
Good
7.67μg/m³
PM2.5
31.27μg/m³
PM10
44.39ppb
O3
0.67ppb
SO2
6.44ppb
NO2
0.39ppm
CO
AQI 44
Good
7.87μg/m³
PM2.5
32.91μg/m³
PM10
44.59ppb
O3
0.66ppb
SO2
7.21ppb
NO2
0.39ppm
CO
AQI 44
Good
7.89μg/m³
PM2.5
32.88μg/m³
PM10
44.53ppb
O3
0.66ppb
SO2
7.29ppb
NO2
0.39ppm
CO
AQI 44
Good
7.96μg/m³
PM2.5
33.83μg/m³
PM10
44.99ppb
O3
0.67ppb
SO2
7.23ppb
NO2
0.38ppm
CO
Air quality data and pollutant measurements for Florida, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Port St. John, Florida is updated every hour.
The worst air quality in Port St. John, Florida in the last 24 hours was observed at 04:00:00 on 2026-08-18.
In the last 24 hrs, the best air quality in Port St. John, Florida was observed at 11:00:00 on 2026-08-18.
The current air quality in Port St. John, Florida is 49, categorized as Good based on real-time data.
The most common pollutant in Port St. John, Florida is PM2.5.
If the air quality in Port St. John, Florida is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Port St. John, Florida is 9.3 μg/m3.
The current PM10 concentration at Port St. John, Florida is 38.231 μg/m3.
The current carbon monoxide (CO) concentration at Port St. John, Florida is 0.395 ppm.
The current sulfur dioxide (SO2) concentration at Port St. John, Florida is 0.591 ppb.
The current ozone (O3) concentration at Port St. John, Florida is 41.88 ppm.
The current nitrogen dioxide (NO2) concentration at Port St. John, Florida is 8.139 ppb.
All Rights Reserved © Ambee Inc. 2025