SmogRank / World / Brazil / February 2026

Most polluted cities in Brazil, February 2026

5 cities in Brazil ranked by their average PM2.5 over the 28 days. Worst: Nilópolis at 11.3 µg/m³, #1,052 of 2,520 cities in the world. Cleanest: Barra da Tijuca at 5.1. A city needs measurements on 70% of the days to be ranked.

← Nilópolis 11.3 µg/m³ 20 µg/m³0
Every city in Brazil ranked for February 2026, 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. 1NilópolisRio de Janeiro
    2
  2. 2Duque de CaxiasRio de Janeiro
    1
  3. 3AcariRio de Janeiro
    1
  4. 4Rio de JaneiroRio de Janeiro
    1
  5. 5Barra da TijucaRio de Janeiro
    1
Low risk1–3
Moderate risk4–6
High risk7–10
Very high risk10+

Canada's AQHI+ for PM2.5 (1 point per 10 µg/m³), which is defined on hourly values. 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, February 2026 · Brazil now

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SmogRank, most polluted cities in Brazil, PM2.5, February 2026, smogrank.com/br/history/2026-02 (accessed 2 Oct 2026).

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