Air quality in Letterkenny, Ireland today
Mr. Duck’s Air Quality Score
Moderate air today for Letterkenny, Ireland
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Letterkenny is currently classified as Moderate. The primary pollutant measured is PM2.5 (fine particles). Recent observations show a PM2.5 concentration of 12.91 µg/m³ and a PM10 level of 14.59 µg/m³, based on three valid measurements collected through OpenAQ.
These values reflect the present monitoring snapshot for the city. 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 Letterkenny currently draws from a single monitoring location – the Donegal Letterkenny Library – and contains three rows of recent measurements, one for each pollutant that is reported. The pollutants available are particulate matter with a 10‑micron cut‑off (PM10), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All three values were recorded at the same moment, 2026‑02‑10 13:00 UTC, so the freshest data for the city is just under two weeks old.
For PM10 the only reading in the set is 14.59 µg/m³; this figure also serves as the minimum, median and maximum because there is a single observation. The same pattern holds for PM2.5, recorded at 12.91 µg/m³, and for SO₂, measured at 3.42 µg/m³. Because each pollutant has only one data point, there is no observable spread or variability within the current collection – the reported “range” collapses to a single value for every metric.
The limited station coverage means that spatial differences across Letterkenny are not captured; conditions at other neighbourhoods could differ from those at the library site. Likewise, the temporal depth of the record is shallow: there are no older rows, and all three pollutants share the same timestamp, so trends or day‑to‑day changes cannot be assessed from this snapshot. Users should keep in mind that while the data are recent, they represent a very narrow slice of the city’s air quality landscape.
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 are based on three valid measurements and have been refreshed recently, with the latest update recorded on 10 February 2026 at 13:00 UTC; the dataset is considered “Updated within 3 days.” While this snapshot provides a reliable overview for Letterkenny, air‑quality levels can differ across neighbourhoods and change throughout the day, so conditions may vary locally.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Donegal Letterkenny Library | pm10 | 14.59 | µg/m³ | 2026-02-10 13:00 UTC |
| Donegal Letterkenny Library | pm25 | 12.91 | µg/m³ | 2026-02-10 13:00 UTC |
| Donegal Letterkenny Library | so2 | 3.42 | µg/m³ | 2026-02-10 13:00 UTC |