The Air Quality — European Air Quality Index (EAQI) indicator shows the daily mean air quality index calculated according to the European Environment Agency (EEA) methodology. The EAQI integrates concentrations of five key pollutants — PM10, PM2.5, O₃ (ozone), NO₂ (nitrogen dioxide), and SO₂ (sulphur dioxide) — into a single composite indicator.
The EAQI scale ranges from 1 (good air quality) to 5 (extremely poor air quality):
| Level | Index | Colour | Meaning |
|---|---|---|---|
| Good | 1 | Green | No significant impact on health and ecosystems |
| Fair | 2 | Yellow | Possible mild effects for sensitive groups |
| Moderate | 3 | Orange | Moderate effects for sensitive groups |
| Poor | 4 | Red | Health effects for general population |
| Extremely poor | 5 | Dark purple | Severe health effects |
The EAQI is the official European standard for air quality communication, compliant with Directive 2008/50/EC.
Data come from the Open-Meteo Air Quality API (CAMS model). The variable used is european_aqi (composite EAQI index). The value is determined by the pollutant with the worst concentration relative to its limits. For each day, the average of hourly values is calculated.
| Code | Name | Provider | Type | Coverage | Availability |
|---|---|---|---|---|---|
WRD_OPNAQ_99 | Open-Meteo Air Quality API | Open-Meteo / CAMS | db | Global (Europe: 11 km) | From 2013 to present |
European Air Quality Index (EAQI) daily average. Integrates PM10, PM2.5, O₃, NO₂ and SO₂ on a 1-5 scale (EEA). Open-Meteo variable: european_aqi. Daily average of hourly values. Source: Open-Meteo Air Quality API (CAMS). Unit: dimensionless (1-5 scale).