Air quality in Swansea, Wales, United Kingdom today
Mr. Duck’s Air Quality Score
Good air today for Swansea, Wales, 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 in Swansea today is classified as Good. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 4.0 and a PM10 reference value of 6.0, based on three valid observations recorded via OpenAQ.
Overall conditions meet the criteria for the Good category, reflecting low concentrations of the measured pollutants. 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
The dataset for Swansea includes three measured pollutants – nitrogen dioxide (NO2), particulate matter up to 10 µm (PM10) and fine particulate matter up to 2.5 µm (PM2.5). All of the available readings come from a single roadside monitoring site, identified as Swansea Roadside – UKA00497, so the city’s air‑quality picture is based on one location rather than a network of stations.
Each pollutant shows an identical timestamp for its most recent observation: 2026-02-10 20:00 UTC. This date falls within the last seven days, meaning the data are relatively fresh but reflect only the conditions at that specific moment. The values are uniform across the recorded period – NO2 is consistently 18.0 µg/m³, PM10 stays at 6.0 µg/m³ and PM2.5 remains at 4.0 µg/m³ – with the minimum, median and maximum all identical for each pollutant. Consequently there is no observed spread or variability in the numbers themselves.
Because only one monitoring row contributes to the dataset, coverage across the city is limited; conditions can differ elsewhere and at other times. The freshness of the data is good for this single snapshot, yet the lack of multiple stations means the current figures do not capture spatial differences within Swansea.
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 three valid measurements and is updated within 3 days, with the most recent reading recorded at 2026‑02‑10T20:00:00+00:00. These figures provide a brief snapshot of Swansea’s air quality; conditions can differ across neighbourhoods and change throughout the day, so this information represents only a limited view of overall exposure.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Swansea Roadside - UKA00497 | no2 | 18.0 | µg/m³ | 2026-02-10 20:00 UTC |
| Swansea Roadside - UKA00497 | pm10 | 6.0 | µg/m³ | 2026-02-10 20:00 UTC |
| Swansea Roadside - UKA00497 | pm25 | 4.0 | µg/m³ | 2026-02-10 20:00 UTC |