Air quality in Lisburn and Castlereagh District, Northern Ireland, United Kingdom today
Mr. Duck’s Air Quality Score
Moderate air today for Lisburn and Castlereagh District, Northern Ireland, 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 Lisburn and Castlereagh District is classified as Moderate. The primary pollutant measured is PM2.5. The latest reading shows a PM2.5 concentration of 9.83 µg/m³. The reported PM2.5 value reflects the average of the five valid observations. The concentration of 9.83 µg/m³ is expressed in micrograms per cubic metre.
Data is shown via OpenAQ. No PM10 data is currently reported for this location. The data snapshot reflects conditions at the time of measurement. The data set includes five distinct measurement points within the district. All values are reported in accordance with the OpenAQ data format. 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 Lisburn and Castlereagh District air‑quality feed currently draws from a single monitoring location in Ballybeen. Five recent rows of data have been recorded, all dated within the last 30 days, and the most recent timestamp for every pollutant is 2026‑02‑02 20:00 UTC. The dataset supplies five measured variables: PM1, PM2.5, relative humidity, temperature and the particle count labelled UM003. Because each pollutant appears in only one row, the reported minimum, median and maximum values are identical, meaning there is no observed spread for any of the measurements.
At the Ballybeen site the latest figures show a PM1 concentration of 3.9248333275318132 µg/m³, a PM2.5 concentration of 9.833666674296062 µg/m³, relative humidity of 53.50933361053467 %, temperature of 11.20983330408732 °C and a particle density (UM003) of 426.3943323771159 particles/cm³. Since the data set contains a single observation per pollutant, the median values match these exact numbers, and the lack of additional rows means no range or variability can be derived from the current record.
The coverage is therefore limited to one monitoring point, and while the timestamps are recent, the snapshot does not capture spatial differences that may exist across the wider district. Users should keep in mind that conditions can change by location and over time, and that the present data reflects only the most recent reading from Ballybeen rather than a comprehensive city‑wide picture.
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
These figures are based on five valid measurements and were updated within 30 days, with the latest data recorded on 2026-02-02 at 20:00 UTC. The values represent a snapshot of air quality across Lisburn and Castlereagh District and may differ by specific location or time of day within the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Ballybeen | pm1 | 3.9248333275318132 | µg/m³ | 2026-02-02 20:00 UTC |
| Ballybeen | pm25 | 9.833666674296062 | µg/m³ | 2026-02-02 20:00 UTC |
| Ballybeen | relativehumidity | 53.50933361053467 | % | 2026-02-02 20:00 UTC |
| Ballybeen | temperature | 11.20983330408732 | c | 2026-02-02 20:00 UTC |
| Ballybeen | um003 | 426.3943323771159 | particles/cm³ | 2026-02-02 20:00 UTC |