SmogRank / World / Portugal / March 2023

Most polluted cities in Portugal, March 2023

6 cities in Portugal ranked by their average PM2.5 over the 31 days. Worst: Amora at 8.6 µg/m³, #422 of 948 cities in the world. Cleanest: Faro at 2.9. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for 20 of these 31 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; many cities elsewhere are missing from this board, not clean. Why.

← Amora 8.6 µg/m³ 20 µg/m³0
Every city in Portugal ranked for March 2023, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1AmoraSetúbal
    48
  2. 2ParedesPorto
    44
  3. 3CacémLisbon
    43
  4. 4CorroiosSetúbal
    30
  5. 5FunchalMadeira
    26
  6. 6FaroFaro
    16
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, March 2023 · Portugal now

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SmogRank, most polluted cities in Portugal, PM2.5, March 2023, smogrank.com/pt/history/2023-03 (accessed 2 Oct 2026).

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