What would you be breathing at that address?
Type an address anywhere in Portugal. airhome shows how its air compares with the rest of the country, what the nearest official monitoring stations have actually measured over the past decade, and what sits near it that affects the air — industry, major roads, and developments we know about.
Free. No account. We keep the address you type only as a geocoder cache entry so the next person searching the same street does not re-query the map service.
How to read the rating
The rating is a comparison with where other people in Portugal live, not a verdict on your health. 100 means nobody in the country lives anywhere cleaner; 0 means nobody lives anywhere dirtier.
It is built from two pollutants: fine particles (PM2.5) and nitrogen dioxide, weighted 60/40, read from a 1 km European map for 2024, and ranked against the 9.9 million people on the Portuguese mainland rather than against its empty square kilometres. The interior is unusually clean and almost empty, so ranking a coastal suburb against every hectare of moorland says it is among the dirtiest places in the country when it is cleaner than most places anybody lives. Both figures are shown; the population one leads. Every page also prints the land-area version underneath.
We use a percentile rather than a health threshold on purpose. Almost every address in Europe is above the World Health Organization's guideline for fine particles, so a WHO-based scale would mark nearly every home in Portugal as bad and help nobody choose between two of them. The WHO guideline and the EU limit are drawn on the charts as reference lines instead.
airhome will not tell you an address is safe or healthy. It tells you where it sits relative to everywhere else, what the monitors recorded, and what is next door. The judgement is yours.
Try one
Cleanest and dirtiest councils
Cleanest
- 97
- 96
- 95
- 95
- 94
Dirtiest
- 9
- 14
- 14
- 17
- 17
MODELLED — 1 km European maps for 2024, averaged over each concelho and weighted by where its people live. All 308.
Sources and what they cannot tell you
- Measured history — European Environment Agency Air Quality Download Service: 19,038,066 validated hourly observations from Portugal's 71 stations, 2013–2026. Station names from APA QualAr. A station is not your street. Nitrogen dioxide in particular varies by hundreds of per cent over a few hundred metres.
- Modelled values at the address — the EEA / ETC-HE 1 km European air quality maps, 2024 and the three years before it. A 1 km cell is an average over a square kilometre. It cannot see one side of a street being busier than the other, and it will understate a very local source and overstate a very local clean spot.
- Industry — European Industrial Emissions Portal, reporting year 2024, as declared by operators. Only installations above the European reporting thresholds appear. Emissions reported are annual totals: they say nothing about when, or which way the wind was blowing.
- Roads — OpenStreetMap, © OpenStreetMap contributors (ODbL). Distance to a road class, not to traffic. A quiet primary road and a jammed one look identical here.
- Boundaries — CAOP (Carta Administrativa Oficial de Portugal, DGT), all 308 concelhos and the freguesias of the Lisbon and Porto metropolitan areas.
- Known projects — curated by hand, each with a citation. Not a forecast. Incomplete by construction.
- Address lookup — OpenStreetMap Nominatim. A geocoder returns the coordinate it thinks you meant. Check the place name we echo back before trusting the figures.
- Not used — CAMS reanalysis, which would give hourly modelled history, needs a Copernicus Atmosphere Data Store key that this build does not have. Madeira and the Azores fall outside the 1 km European map domain, so those 30 municipalities have measured station data but no modelled values and no rating.
Data built 2026-09-21. airhome is free and has no commercial relationship with anyone selling property.