Stay updated with real-time air quality in Hertford, 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)
27
Good
Hertford, Hertfordshire
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
4.78 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.24 μg/m³
0
55
155
255
425
605+
24.16 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
7.34 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Hertford, Hertfordshire
Hertford, Hertfordshire
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AQI 26
Good
2.84μg/m³
PM2.5
8.29μg/m³
PM10
27.76ppb
O3
0.76ppb
SO2
8.81ppb
NO2
0.01ppm
CO
AQI 23
Good
3.17μg/m³
PM2.5
8.25μg/m³
PM10
24.94ppb
O3
0.74ppb
SO2
8.54ppb
NO2
0.01ppm
CO
AQI 26
Good
2.81μg/m³
PM2.5
9.26μg/m³
PM10
27.64ppb
O3
0.73ppb
SO2
9.41ppb
NO2
0.01ppm
CO
AQI 23
Good
3.10μg/m³
PM2.5
6.35μg/m³
PM10
25.30ppb
O3
0.70ppb
SO2
10.75ppb
NO2
0.01ppm
CO
AQI 24
Good
2.85μg/m³
PM2.5
7.98μg/m³
PM10
25.67ppb
O3
0.82ppb
SO2
6.69ppb
NO2
0.01ppm
CO
AQI 22
Good
3.35μg/m³
PM2.5
6.60μg/m³
PM10
24.43ppb
O3
0.77ppb
SO2
8.82ppb
NO2
0.02ppm
CO
Air quality and pollutant data for Hertfordshire, UK 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 Hertford, Hertfordshire is updated every hour for accuracy.
In the past 24 hours, the air quality in Hertford, Hertfordshire was at its worst at 08:00:00 on 2025-07-22.
In the last 24 hours, the best air quality in Hertford, Hertfordshire was observed at 07:00:00 on 2025-07-22.
As of now, the AQI in Hertford, Hertfordshire is 23, indicating Good conditions.
Hertford, Hertfordshire air has the highest levels of O3.
Poor air quality in Hertford, Hertfordshire means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Hertford, Hertfordshire are currently 3.167 μg/m3.
The PM10 concentration in Hertford, Hertfordshire is 8.254 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hertford, Hertfordshire is 0.012 ppm.
Currently, Hertford, Hertfordshire has a sulfur dioxide (SO2) concentration of 0.745 ppb.
The current ozone (O3) level in Hertford, Hertfordshire at the moment is 24.941 ppm.
Nitrogen dioxide (NO2) level in Hertford, Hertfordshire at the moment is 8.535 ppb.
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