Stay updated with real-time air quality in Hertfordshire, UK 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
Hertfordshire, UK
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
6.32 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.82 μg/m³
0
55
155
255
425
605+
35.62 ppb
0
55
71
86
201
201+
0.82 ppb
0
36
76
186
605
1005+
5.86 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Hertfordshire, UK
Hertfordshire, UK
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City | AQI | PM2.5 | PM10 | O3 | SO2 | NO2 | CO |
---|
AQI 38
Good
7.34μg/m³
PM2.5
16.64μg/m³
PM10
35.62ppb
O3
0.82ppb
SO2
4.94ppb
NO2
0.24ppm
CO
AQI 44
Good
8.47μg/m³
PM2.5
31.16μg/m³
PM10
34.13ppb
O3
1.17ppb
SO2
7.18ppb
NO2
0.23ppm
CO
AQI 31
Good
3.96μg/m³
PM2.5
9.65μg/m³
PM10
33.47ppb
O3
0.43ppb
SO2
8.10ppb
NO2
0.28ppm
CO
AQI 38
Good
6.56μg/m³
PM2.5
12.86μg/m³
PM10
34.55ppb
O3
0.85ppb
SO2
3.57ppb
NO2
0.23ppm
CO
AQI 38
Good
7.19μg/m³
PM2.5
16.56μg/m³
PM10
35.09ppb
O3
0.81ppb
SO2
3.35ppb
NO2
0.23ppm
CO
AQI 38
Good
7.08μg/m³
PM2.5
17.62μg/m³
PM10
35.70ppb
O3
0.86ppb
SO2
2.91ppb
NO2
0.23ppm
CO
Air quality data and pollutant measurements for Hertfordshire, UK adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Hertfordshire, UK is updated every hour.
The worst air quality in Hertfordshire, UK in the last 24 hours was observed at 10:00:00 on 2025-06-14.
In the last 24 hrs, the best air quality in Hertfordshire, UK was observed at 08:00:00 on 2025-06-15.
The current air quality in Hertfordshire, UK is 33, categorized as Good based on real-time data.
The most common pollutant in Hertfordshire, UK is O3.
If the air quality in Hertfordshire, UK is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Hertfordshire, UK is 6.316 μg/m3.
The current PM10 concentration at Hertfordshire, UK is 14.817 μg/m3.
The current carbon monoxide (CO) concentration at Hertfordshire, UK is 0.237 ppm.
The current sulfur dioxide (SO2) concentration at Hertfordshire, UK is 0.825 ppb.
The current ozone (O3) concentration at Hertfordshire, UK is 35.617 ppm.
The current nitrogen dioxide (NO2) concentration at Hertfordshire, UK is 5.864 ppb.
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