Air quality in Sheffield, England, United Kingdom today

Mr. Duck’s Air Quality Score

Moderate air today for Sheffield, England, United Kingdom

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Sheffield today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles).

Measurements recorded by OpenAQ show a PM2.5 concentration of 13.94 µg/m³ and a reference value for PM10 of 17.0 µg/m³, based on twenty valid observations. 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

Sheffield’s open‑air quality feed currently contains eight measured variables – nitrogen dioxide (NO2), ozone (O3), particulate matter of 1 µm (PM1), 2.5 µm (PM2.5) and 10 µm (PM10) size fractions, relative humidity, temperature, and particle count (UM003). The dataset is built from five monitoring rows spread across two stations, with the most recent readings recorded on 2026‑02‑10 at either 20:00 or 21:00 UTC depending on the pollutant. All eight pollutants have data that were updated within the last seven days, so the information reflects conditions from just a few hours ago.

Across the five rows the observed concentrations show modest variation. PM2.5 values range from about 13.94 to 18 µg/m³ with a median of 15 µg/m³; NO2 spans 20 to 38 µg/m³, centred on a median of 20 µg/m³; and PM10 varies between 17 and 19 µg/m³, with a median near 18.5 µg/m³. Ozone is the lowest‑level pollutant in this snapshot, ranging from 15 to 20 µg/m³ (median 17.5 µg/m³). The finer particle fraction, PM1, is recorded between 6.23 and 8.38 µg/m³ (median roughly 7.30 µg/m³). Relative humidity measurements sit between 66.6 % and 70.8 % (median about 68.7 %), while temperature is confined to a narrow band of 10.44 °C to 11.76 °C (median around 11.1 °C). Particle count (UM003) shows the widest spread, from roughly 555 to 1 214 particles/cm³ with a median near 885.

Because only two monitoring sites contribute data, spatial coverage is limited and conditions can differ across neighbourhoods not directly sampled. Nonetheless, the timestamps indicate that each pollutant’s latest value was captured within the past few hours, providing a current picture of Sheffield’s air quality at the time of access.

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 dataset for Sheffield includes 20 valid measurements and is updated within 3 days, with the most recent data recorded at 2026‑02‑10T21:00:00+00:00. These figures represent a snapshot of current conditions; air quality can differ across neighbourhoods and change throughout the day, so values may not reflect every location or moment in the city.

OpenAQ station rows