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)
79
Moderate
Johnston, Iowa
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
23.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
105.58 μg/m³
0
55
155
255
425
605+
40.18 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
3.05 ppb
0
54
101
361
1250
2050+
0.37 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Johnston, Iowa
Johnston, Iowa
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AQI 77
Moderate
23.46μg/m³
PM2.5
89.55μg/m³
PM10
36.57ppb
O3
0.52ppb
SO2
3.12ppb
NO2
0.38ppm
CO
AQI 77
Moderate
22.85μg/m³
PM2.5
73.49μg/m³
PM10
38.16ppb
O3
0.51ppb
SO2
3.12ppb
NO2
0.37ppm
CO
AQI 81
Moderate
25.24μg/m³
PM2.5
104.86μg/m³
PM10
36.33ppb
O3
0.52ppb
SO2
3.11ppb
NO2
0.38ppm
CO
AQI 75
Moderate
21.93μg/m³
PM2.5
99.99μg/m³
PM10
42.10ppb
O3
0.50ppb
SO2
3.02ppb
NO2
0.37ppm
CO
AQI 82
Moderate
26.16μg/m³
PM2.5
113.42μg/m³
PM10
37.54ppb
O3
0.51ppb
SO2
3.08ppb
NO2
0.38ppm
CO
AQI 87
Moderate
25.88μg/m³
PM2.5
127.68μg/m³
PM10
35.12ppb
O3
0.52ppb
SO2
3.11ppb
NO2
0.38ppm
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 08:00:00 on 2025-06-04.
In the last 24 hours, the best air quality in Johnston, Iowa was observed at 06:00:00 on 2025-06-03.
As of now, the AQI in Johnston, Iowa is 79, 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 23.682 μg/m3.
The PM10 concentration in Johnston, Iowa is 105.579 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Johnston, Iowa is 0.372 ppm.
Currently, Johnston, Iowa has a sulfur dioxide (SO2) concentration of 0.505 ppb.
The current ozone (O3) level in Johnston, Iowa at the moment is 40.177 ppm.
Nitrogen dioxide (NO2) level in Johnston, Iowa at the moment is 3.046 ppb.
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