Stay updated with real-time air quality in Stevenage, Hertfordshire 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)
44
Good
Stevenage, Hertfordshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.31 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.80 μg/m³
0
55
155
255
425
605+
13.29 ppb
0
55
71
86
201
201+
0.86 ppb
0
36
76
186
605
1005+
13.81 ppb
0
54
101
361
1250
2050+
0.80 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Stevenage, Hertfordshire
Stevenage, Hertfordshire
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AQI 44
Good
8.13μg/m³
PM2.5
13.68μg/m³
PM10
19.33ppb
O3
0.95ppb
SO2
22.80ppb
NO2
1.01ppm
CO
AQI 44
Good
8.13μg/m³
PM2.5
13.68μg/m³
PM10
19.33ppb
O3
0.95ppb
SO2
22.80ppb
NO2
1.01ppm
CO
AQI 27
Good
5.45μg/m³
PM2.5
29.17μg/m³
PM10
22.59ppb
O3
0.95ppb
SO2
14.16ppb
NO2
1.01ppm
CO
AQI 49
Good
9.48μg/m³
PM2.5
22.30μg/m³
PM10
27.28ppb
O3
0.95ppb
SO2
22.27ppb
NO2
1.01ppm
CO
AQI 27
Good
5.45μg/m³
PM2.5
29.17μg/m³
PM10
22.59ppb
O3
0.95ppb
SO2
14.16ppb
NO2
1.01ppm
CO
AQI 49
Good
9.06μg/m³
PM2.5
21.94μg/m³
PM10
24.14ppb
O3
0.96ppb
SO2
22.60ppb
NO2
1.01ppm
CO
Air quality measurements for Hertfordshire, UK meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Stevenage, Hertfordshire is updated on an hourly basis.
The worst air quality in Stevenage, Hertfordshire was recorded at 02:00:00 on 2026-02-11.
The best air quality in Stevenage, Hertfordshire was recorded at 11:00:00 on 2026-02-11.
The real-time air quality index in Stevenage, Hertfordshire is 44, currently categorized as Good.
The most common pollutant in Stevenage, Hertfordshire is PM2.5.
If the air quality in Stevenage, Hertfordshire is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Stevenage, Hertfordshire at present are 8.313 μg/m3.
The current PM10 levels in Stevenage, Hertfordshire are 25.797 μg/m3.
The current carbon monoxide (CO) level in Stevenage, Hertfordshire is 0.803 ppm.
The current sulfur dioxide (SO2) levels in Stevenage, Hertfordshire are 0.864 ppb.
The current ozone (O3) levels at Stevenage, Hertfordshire is 13.286 ppm.
The current nitrogen dioxide (NO2) levels at Stevenage, Hertfordshire is 13.815 ppb.
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