Stay updated with real-time air quality in Leominster, 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)
33
Good
Leominster, County of Herefordshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.15 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.09 μg/m³
0
55
155
255
425
605+
20.71 ppb
0
55
71
86
201
201+
0.89 ppb
0
36
76
186
605
1005+
20.01 ppb
0
54
101
361
1250
2050+
0.76 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Leominster, County of Herefordshire
Leominster, County of Herefordshire
Scroll To Air Quality MapLoading...
AQI 33
Good
5.91μg/m³
PM2.5
11.99μg/m³
PM10
26.34ppb
O3
1.00ppb
SO2
17.03ppb
NO2
0.76ppm
CO
AQI 38
Good
6.51μg/m³
PM2.5
12.34μg/m³
PM10
20.76ppb
O3
0.81ppb
SO2
15.89ppb
NO2
0.76ppm
CO
AQI 44
Good
7.85μg/m³
PM2.5
12.32μg/m³
PM10
25.80ppb
O3
0.84ppb
SO2
11.87ppb
NO2
0.76ppm
CO
AQI 52
Moderate
9.87μg/m³
PM2.5
15.15μg/m³
PM10
20.76ppb
O3
0.95ppb
SO2
18.62ppb
NO2
0.76ppm
CO
AQI 54
Moderate
10.94μg/m³
PM2.5
12.74μg/m³
PM10
20.76ppb
O3
0.83ppb
SO2
21.87ppb
NO2
0.76ppm
CO
AQI 38
Good
7.02μg/m³
PM2.5
12.31μg/m³
PM10
20.60ppb
O3
0.79ppb
SO2
15.36ppb
NO2
0.76ppm
CO
Air quality measurements for County of Herefordshire, 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 Leominster, County Of Herefordshire is updated on an hourly basis.
The worst air quality in Leominster, County Of Herefordshire was recorded at 05:00:00 on 2026-11-12.
The best air quality in Leominster, County Of Herefordshire was recorded at 10:00:00 on 2026-11-12.
The real-time air quality index in Leominster, County Of Herefordshire is 33, currently categorized as Good.
The most common pollutant in Leominster, County Of Herefordshire is PM2.5.
If the air quality in Leominster, County Of Herefordshire is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Leominster, County Of Herefordshire at present are 6.154 μg/m3.
The current PM10 levels in Leominster, County Of Herefordshire are 12.091 μg/m3.
The current carbon monoxide (CO) level in Leominster, County Of Herefordshire is 0.763 ppm.
The current sulfur dioxide (SO2) levels in Leominster, County Of Herefordshire are 0.892 ppb.
The current ozone (O3) levels at Leominster, County Of Herefordshire is 20.711 ppm.
The current nitrogen dioxide (NO2) levels at Leominster, County Of Herefordshire is 20.006 ppb.
All Rights Reserved © Ambee Inc. 2025