Air quality in Dún Laoghaire-Rathdown, Ireland today

Mr. Duck’s Air Quality Score

Good air today for Dún Laoghaire-Rathdown, Ireland

⚠️ 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 Dún Laoghaire‑Rathdown is currently classified as Good. The principal pollutant measured is PM2.5 (fine particles). Recent observations show a PM2.5 reference value of 3.39 and a PM10 reference value of 3.89, based on six valid measurements recorded by OpenAQ.

These figures indicate that the particulate concentrations are within the range associated with the Good category for today. 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 air‑quality dataset for Dún Laoghaire‑Rathdown contains measurements for four key pollutants – nitrogen dioxide (NO₂), ozone (O₃), particulate matter up to 10 µm (PM₁₀) and particulate matter up to 2.5 µm (PM₂.₅). In total there are thirteen data rows drawn from three monitoring sites, so each pollutant is not represented equally across the city.

The most recent values are fairly fresh for PM₁₀, PM₂.₅ and O₃, all last updated on 2026‑02‑10 (19:00 UTC for the particulates and 13:00 UTC for ozone). The NO₂ reading is older, dated 2025‑09‑13 (10:00 UTC), and is flagged as “old data”. Across the dataset the freshness breakdown shows six rows updated within the past three days, while seven rows are classified as old; there are no entries marked unknown or with longer delays.

Looking at the numbers themselves, PM₁₀ values range from 3.89 to 9.23 µg/m³ with a median of about 4.08 µg/m³, indicating most recent observations sit near the lower end of that spread. PM₂.₅ spans 2.27‑6.13 µg/m³ with a median of 3.39 µg/m³, again clustering toward the bottom of its range. Ozone measurements are less variable, recorded at a single value of 48.58 µg/m³ (both minimum and maximum) for the latest update. NO₂ shows a broader spread from 2.1 to 4.71 µg/m³, with the highest recent reading coming from the Dun Laoghaire The Glen site.

Overall, the dataset provides recent particulate and ozone data but relies on an older nitrogen‑dioxide measurement, and coverage is limited to three stations, meaning conditions can differ across other parts of Dún Laoghaire‑Rathdown.

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 current dataset for Dún Laoghaire‑Rathdown includes six valid measurements and was updated within three days, with the latest reading recorded at 19:00 UTC on 10 February 2026. This snapshot reflects conditions at that specific time; air quality can differ across neighbourhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows