Air quality in Herefordshire, England, United Kingdom today
Mr. Duck’s Air Quality Score
Good air today for Herefordshire, England, United Kingdom
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality today in Herefordshire is classified as Good. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 6.13 µg/m³ based on seven valid observations recorded by OpenAQ.
Overall, the data indicate that particulate levels are within the range associated with the Good category for this location. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.
Latest sensor values
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
What the data includes
Herefordshire’s air‑quality dataset currently contains seven individual measurement rows drawn from two monitoring sites. The most recent data points are all within the last week, with the newest timestamps recorded on 2026‑02‑10 at either 19:00 UTC (for nitrogen dioxide and ozone) or 21:00 UTC (for particulate matter, humidity, temperature and particle count). This means that every pollutant listed below has a fresh observation no older than two days.
The available pollutants are nitrogen dioxide (NO2) measured at 11.0 µg/m³ in Leominster, ozone (O3) at 49.0 µg/m³ also in Leominster, particulate matter of 1 µm diameter (PM1) at 1.3971666644016902 µg/m³ and fine particulate matter (PM2.5) at 6.132833321889241 µg/m³ both recorded at Much Birch. In addition, the dataset includes relative humidity of 66.78249944051107 % and temperature of 13.232833417256673 °C from Much Birch, as well as a particle count (UM003) of 288.35866928100586 particles/cm³ at the same location.
All seven rows share identical minimum, median and maximum values for each pollutant, indicating that only a single recent reading is present per parameter rather than a range of observations over time. Consequently, while the data are up‑to‑date, they provide a snapshot rather than a trend, and conditions can differ across other parts of Herefordshire or at different times of day. The coverage is uneven: nitrogen dioxide and ozone come from Leominster, whereas all other variables are sourced solely from Much Birch, so spatial representation is limited to these two points within the county.
Learn more about sources and filtering: About the data.
Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)
Latest sensor values (bars)
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
Data notes
The data shown reflects seven valid measurements and is updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 21:00 UTC. While this provides a current snapshot of air quality across Herefordshire, conditions can differ by specific neighbourhoods and change throughout the day, so local variations may not be captured in these aggregate figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Leominster - UKA00489 | no2 | 11.0 | µg/m³ | 2026-02-10 19:00 UTC |
| Leominster - UKA00489 | o3 | 49.0 | µg/m³ | 2026-02-10 19:00 UTC |
| Much Birch | pm1 | 1.3971666644016902 | µg/m³ | 2026-02-10 21:00 UTC |
| Much Birch | pm25 | 6.132833321889241 | µg/m³ | 2026-02-10 21:00 UTC |
| Much Birch | relativehumidity | 66.78249944051107 | % | 2026-02-10 21:00 UTC |
| Much Birch | temperature | 13.232833417256673 | c | 2026-02-10 21:00 UTC |
| Much Birch | um003 | 288.35866928100586 | particles/cm³ | 2026-02-10 21:00 UTC |