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)
67
Moderate
Hertford, Hertfordshire
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
11.26 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.04 μg/m³
0
55
155
255
425
605+
59.77 ppb
0
55
71
86
201
201+
1.68 ppb
0
36
76
186
605
1005+
3.58 ppb
0
54
101
361
1250
2050+
0.01 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Hertford, Hertfordshire
Hertford, Hertfordshire
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AQI 49
Good
9.27μg/m³
PM2.5
22.22μg/m³
PM10
32.24ppb
O3
1.04ppb
SO2
13.24ppb
NO2
0.36ppm
CO
AQI 38
Good
7.13μg/m³
PM2.5
16.71μg/m³
PM10
28.43ppb
O3
1.08ppb
SO2
14.69ppb
NO2
0.36ppm
CO
AQI 49
Good
9.14μg/m³
PM2.5
16.70μg/m³
PM10
35.38ppb
O3
1.04ppb
SO2
17.35ppb
NO2
0.36ppm
CO
AQI 49
Good
9.02μg/m³
PM2.5
17.74μg/m³
PM10
27.83ppb
O3
1.03ppb
SO2
11.49ppb
NO2
0.36ppm
CO
AQI 38
Good
7.02μg/m³
PM2.5
16.83μg/m³
PM10
28.25ppb
O3
1.08ppb
SO2
14.28ppb
NO2
0.36ppm
CO
AQI 49
Good
8.81μg/m³
PM2.5
17.19μg/m³
PM10
36.58ppb
O3
0.97ppb
SO2
17.35ppb
NO2
0.36ppm
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 04:00:00 on 2025-06-19.
In the last 24 hours, the best air quality in Hertford, Hertfordshire was observed at 01:00:00 on 2025-06-18.
As of now, the AQI in Hertford, Hertfordshire is 49, indicating Good conditions.
Hertford, Hertfordshire air has the highest levels of PM2.5.
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 9.066 μg/m3.
The PM10 concentration in Hertford, Hertfordshire is 17.858 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hertford, Hertfordshire is 0.356 ppm.
Currently, Hertford, Hertfordshire has a sulfur dioxide (SO2) concentration of 1.012 ppb.
The current ozone (O3) level in Hertford, Hertfordshire at the moment is 28.933 ppm.
Nitrogen dioxide (NO2) level in Hertford, Hertfordshire at the moment is 6.637 ppb.
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