SmogRank / World / South Africa / May 2025

Most polluted cities in South Africa, May 2025

4 cities in South Africa ranked by their average PM2.5 over the 31 days. Worst: Vereeniging at 43.3 µg/m³, #30 of 2,187 cities in the world. Cleanest: Richards Bay at 14.8. A city needs measurements on 70% of the days to be ranked.

← Vereeniging 43.3
Every city in South Africa ranked for May 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. 1VereenigingGauteng
    120
  2. 2Shakaskraallow-cost sensorsKwaZulu-Natal
    77
  3. 3TongaatKwaZulu-Natal
    77
  4. 4Richards BayKwaZulu-Natal
    62
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, May 2025 · South Africa now

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SmogRank, most polluted cities in South Africa, PM2.5, May 2025, smogrank.com/za/history/2025-05 (accessed 2 Oct 2026).

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