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Air quality tools
Two free tools that work directly with the European data, check a PM2.5 reading against the health guidelines, or compare any two countries.
Data updated 2026-06-14
PM2.5 guideline checker
Enter an annual-mean PM2.5 concentration (µg/m³) to see how it compares to the WHO 2021 guideline (5) and the current EU limit (25), and where it would rank among the 28 countries we track.
Compare two countries
Pick any two European countries to compare their PM2.5, NO2, ozone, and PM10 annual means side by side.
Go deeper
These tools sit on top of the full dataset, explore the source pages next.
- See every country ranked by PM2.5, NO2, and ozone. Country rankings
- Understand what each pollutant does and where the limits come from. Pollutants & limits
- Read how the EU legal limits compare with WHO health guidelines. EU vs WHO guide
Annual means smooth over daily and seasonal peaks. The WHO guideline is a health target; the EU limit is a legal ceiling.
Data source: EEA Air Quality e-Reporting + national agencies; WHO 2021 Global Air Quality Guidelines. See our methodology.
Every figure on PlainAirQuality is rendered directly from official monitoring-network source data, no number is typed in by an editor. This page draws directly on EEA Air Quality e-Reporting data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.