SmogRank / World / Portugal / August 2025

Most polluted cities in Portugal, August 2025

3 cities in Portugal ranked by their average PM2.5 over the 31 days. Worst: Paredes at 7.1 µg/m³, #1,894 of 2,503 cities in the world. Cleanest: Faro at 3.7. A city needs measurements on 70% of the days to be ranked.

← Paredes 7.1
Every city in Portugal ranked for August 2025, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1ParedesPorto
    7.1
  2. 2FunchalMadeira
    5.7
  3. 3FaroFaro
    3.7
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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, August 2025 · Portugal now

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SmogRank, most polluted cities in Portugal, PM2.5, August 2025, smogrank.com/pt/history/2025-08 (accessed 2 Oct 2026).

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