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)
88
Moderate
Johnston, Iowa
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
28.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
122.39 μg/m³
0
55
155
255
425
605+
14.25 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
16.09 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Johnston, Iowa
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AQI 73
Moderate
21.34μg/m³
PM2.5
72.68μg/m³
PM10
15.93ppb
O3
0.32ppb
SO2
12.70ppb
NO2
0.29ppm
CO
AQI 77
Moderate
22.70μg/m³
PM2.5
45.10μg/m³
PM10
12.91ppb
O3
0.32ppb
SO2
12.66ppb
NO2
0.29ppm
CO
AQI 69
Moderate
19.13μg/m³
PM2.5
83.33μg/m³
PM10
15.43ppb
O3
0.32ppb
SO2
12.61ppb
NO2
0.29ppm
CO
AQI 71
Moderate
19.50μg/m³
PM2.5
80.80μg/m³
PM10
14.41ppb
O3
0.30ppb
SO2
12.07ppb
NO2
0.29ppm
CO
AQI 69
Moderate
19.44μg/m³
PM2.5
85.48μg/m³
PM10
16.02ppb
O3
0.30ppb
SO2
11.94ppb
NO2
0.29ppm
CO
AQI 67
Moderate
18.37μg/m³
PM2.5
70.99μg/m³
PM10
16.85ppb
O3
0.32ppb
SO2
12.61ppb
NO2
0.29ppm
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 09:00:00 on 2026-03-04.
In the last 24 hours, the best air quality in Johnston, Iowa was observed at 12:00:00 on 2026-03-05.
As of now, the AQI in Johnston, Iowa is 71, indicating Moderate 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 19.638 μg/m3.
The PM10 concentration in Johnston, Iowa is 83.289 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Johnston, Iowa is 0.293 ppm.
Currently, Johnston, Iowa has a sulfur dioxide (SO2) concentration of 0.28 ppb.
The current ozone (O3) level in Johnston, Iowa at the moment is 15.844 ppm.
Nitrogen dioxide (NO2) level in Johnston, Iowa at the moment is 12.86 ppb.
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