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)
36
Good
Johnston, Iowa
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.80 μg/m³
0
55
155
255
425
605+
39.19 ppb
0
55
71
86
201
201+
0.16 ppb
0
36
76
186
605
1005+
2.56 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Johnston, Iowa
Johnston, Iowa
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AQI 36
Good
6.33μg/m³
PM2.5
30.80μg/m³
PM10
38.62ppb
O3
0.16ppb
SO2
3.71ppb
NO2
0.26ppm
CO
AQI 36
Good
6.18μg/m³
PM2.5
25.55μg/m³
PM10
38.76ppb
O3
0.16ppb
SO2
3.74ppb
NO2
0.26ppm
CO
AQI 34
Good
6.38μg/m³
PM2.5
30.93μg/m³
PM10
37.28ppb
O3
0.16ppb
SO2
2.62ppb
NO2
0.26ppm
CO
AQI 36
Good
6.14μg/m³
PM2.5
26.36μg/m³
PM10
39.24ppb
O3
0.16ppb
SO2
2.67ppb
NO2
0.26ppm
CO
AQI 36
Good
5.18μg/m³
PM2.5
23.15μg/m³
PM10
39.21ppb
O3
0.15ppb
SO2
2.42ppb
NO2
0.26ppm
CO
AQI 34
Good
6.47μg/m³
PM2.5
31.63μg/m³
PM10
37.39ppb
O3
0.16ppb
SO2
2.44ppb
NO2
0.26ppm
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 03:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Johnston, Iowa was observed at 01:00:00 on 2026-07-23.
As of now, the AQI in Johnston, Iowa is 36, indicating Good conditions.
Johnston, Iowa air has the highest levels of O3.
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 6.127 μg/m3.
The PM10 concentration in Johnston, Iowa is 26.805 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Johnston, Iowa is 0.261 ppm.
Currently, Johnston, Iowa has a sulfur dioxide (SO2) concentration of 0.156 ppb.
The current ozone (O3) level in Johnston, Iowa at the moment is 39.185 ppm.
Nitrogen dioxide (NO2) level in Johnston, Iowa at the moment is 2.563 ppb.
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