Stay updated with real-time air quality in Hereford, County of Herefordshire 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)
21
Good
Hereford, County of Herefordshire
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
1.85 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
3.38 μg/m³
0
55
155
255
425
605+
23.42 ppb
0
55
71
86
201
201+
0.38 ppb
0
36
76
186
605
1005+
1.04 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Hereford, County of Herefordshire
Hereford, County of Herefordshire
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AQI 23
Good
2.94μg/m³
PM2.5
6.73μg/m³
PM10
25.37ppb
O3
2.48ppb
SO2
3.89ppb
NO2
0.07ppm
CO
AQI 24
Good
2.85μg/m³
PM2.5
5.61μg/m³
PM10
25.58ppb
O3
2.43ppb
SO2
0.58ppb
NO2
0.07ppm
CO
AQI 23
Good
2.76μg/m³
PM2.5
6.84μg/m³
PM10
25.14ppb
O3
3.24ppb
SO2
3.66ppb
NO2
0.06ppm
CO
AQI 25
Good
2.80μg/m³
PM2.5
5.61μg/m³
PM10
26.75ppb
O3
2.44ppb
SO2
1.72ppb
NO2
0.07ppm
CO
AQI 23
Good
2.64μg/m³
PM2.5
6.75μg/m³
PM10
25.10ppb
O3
3.48ppb
SO2
3.91ppb
NO2
0.06ppm
CO
AQI 24
Good
3.08μg/m³
PM2.5
7.07μg/m³
PM10
26.06ppb
O3
3.00ppb
SO2
4.16ppb
NO2
0.06ppm
CO
Air quality and pollutant data for County of Herefordshire, 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 Hereford, County Of Herefordshire is updated every hour for accuracy.
In the past 24 hours, the air quality in Hereford, County Of Herefordshire was at its worst at 08:00:00 on 2025-09-16.
In the last 24 hours, the best air quality in Hereford, County Of Herefordshire was observed at 07:00:00 on 2025-09-17.
As of now, the AQI in Hereford, County Of Herefordshire is 24, indicating Good conditions.
Hereford, County Of Herefordshire air has the highest levels of O3.
Poor air quality in Hereford, County Of Herefordshire means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Hereford, County Of Herefordshire are currently 2.534 μg/m3.
The PM10 concentration in Hereford, County Of Herefordshire is 6.205 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Hereford, County Of Herefordshire is 0.071 ppm.
Currently, Hereford, County Of Herefordshire has a sulfur dioxide (SO2) concentration of 2.295 ppb.
The current ozone (O3) level in Hereford, County Of Herefordshire at the moment is 26.488 ppm.
Nitrogen dioxide (NO2) level in Hereford, County Of Herefordshire at the moment is 3.439 ppb.
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