SmogRank / World / Portugal / Setúbal / September 2025

Most polluted cities in Setúbal, Portugal, September 2025

2 cities in Setúbal, Portugal ranked by their average PM2.5 over the 30 days. Worst: Santiago do Cacém at 4.2 µg/m³, #2,840 of 3,052 cities in the world. Cleanest: Sines at 3.1. A city needs measurements on 70% of the days to be ranked.

  1. 1Santiago do Cacém
    23
  2. 2Sines
    17
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

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SmogRank, most polluted cities in Setúbal, Portugal, PM2.5, September 2025, smogrank.com/pt/region/setubal/history/2025-09 (accessed 7 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.