In the app
Almanaccolo shows the European air quality index for your location, along with individual pollutants and the pollen in season.
Particles under 2.5 micrometres are a hundred times thinner than a hair and get past the airway defences all the way to the alveoli. It is the pollutant with the best documented health effect, and usually the one that sets the index in valley cities.
It is not that more is emitted: cold air stays pinned to the ground under a warmer layer — a thermal inversion — and pollutants do not disperse. Three windless days are enough to push the index down two categories.
| Index | Rating | What it means |
|---|---|---|
| 0–20 | Good | No limits, even for sensitive groups. |
| 20–40 | Fair | Outdoor activity is fine. |
| 40–60 | Moderate | Asthma sufferers may ease off prolonged effort. |
| 60–80 | Poor | Postpone intense outdoor activity. |
| 80–100 | Very poor | Limit time outside, especially children and elderly. |
| 100+ | Extremely poor | Stay indoors where possible. |
Data: Open-Meteo Air Quality
Particles under 2.5 micrometres, a hundred times thinner than a hair. They get past the airway defences all the way to the alveoli, and it is the pollutant with the best documented health effect.
Not because more is emitted: cold air stays pinned to the ground under a warmer layer — a thermal inversion — and pollutants do not disperse.
Free app
Almanaccolo greets you each morning with the almanac of the day, sunrise and sunset times and your saved events.
