Stay updated with real-time air quality in Johnston, Iowa 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
Johnston, Iowa
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.14 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
27.10 μg/m³
0
55
155
255
425
605+
20.29 ppb
0
55
71
86
201
201+
0.20 ppb
0
36
76
186
605
1005+
5.18 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Johnston, Iowa
Johnston, Iowa
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AQI 33
Good
6.41μg/m³
PM2.5
27.46μg/m³
PM10
17.24ppb
O3
0.26ppb
SO2
5.46ppb
NO2
0.20ppm
CO
AQI 38
Good
6.66μg/m³
PM2.5
29.64μg/m³
PM10
17.23ppb
O3
0.15ppb
SO2
5.46ppb
NO2
0.20ppm
CO
AQI 38
Good
7.28μg/m³
PM2.5
31.95μg/m³
PM10
17.24ppb
O3
0.16ppb
SO2
5.45ppb
NO2
0.20ppm
CO
AQI 33
Good
5.97μg/m³
PM2.5
26.07μg/m³
PM10
17.23ppb
O3
0.12ppb
SO2
5.27ppb
NO2
0.20ppm
CO
AQI 38
Good
6.87μg/m³
PM2.5
30.38μg/m³
PM10
17.23ppb
O3
0.12ppb
SO2
5.33ppb
NO2
0.20ppm
CO
AQI 38
Good
7.22μg/m³
PM2.5
32.73μg/m³
PM10
17.23ppb
O3
0.21ppb
SO2
5.45ppb
NO2
0.20ppm
CO
Air quality and pollutant data for Iowa, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Johnston, Iowa is updated every hour for accuracy.
In the past 24 hours, the air quality in Johnston, Iowa was at its worst at 06:00:00 on 2025-12-07.
In the last 24 hours, the best air quality in Johnston, Iowa was observed at 03:00:00 on 2025-12-06.
As of now, the AQI in Johnston, Iowa is 38, indicating Good conditions.
Johnston, Iowa air has the highest levels of PM2.5.
Poor air quality in Johnston, Iowa means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Johnston, Iowa are currently 6.907 μg/m3.
The PM10 concentration in Johnston, Iowa is 30.514 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Johnston, Iowa is 0.221 ppm.
Currently, Johnston, Iowa has a sulfur dioxide (SO2) concentration of 0.275 ppb.
The current ozone (O3) level in Johnston, Iowa at the moment is 17.902 ppm.
Nitrogen dioxide (NO2) level in Johnston, Iowa at the moment is 5.436 ppb.
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