SmogRank / World / Africa / South Africa / Gauteng
Most polluted cities in Gauteng, South Africa
No city in Gauteng, South Africa has enough readings to rank so far this year.
A city joins this ranking with enough days of readings so far this year; none here has that right now, so there is nothing to map or chart.
Last 24 hours: 4 measured cities · Last 7 days: 3 measured cities · Last 30 days: 4 measured cities
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
Estimated: cities without a monitor
Gauteng cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Pretoria | ≈ 9 µg/m³ |
| Soweto | ≈ 18 µg/m³ |
| Benoni | ≈ 16 µg/m³ |
| Boksburg | ≈ 15 µg/m³ |
| Krugersdorp | ≈ 9 µg/m³ |
| Randburg | ≈ 15 µg/m³ |
| Roodepoort | ≈ 15 µg/m³ |
| Brakpan | ≈ 15 µg/m³ |
| Germiston | ≈ 22 µg/m³ |
| Carletonville | ≈ 9 µg/m³ |
| Westonaria | ≈ 14 µg/m³ |
| Nigel | ≈ 16 µg/m³ |
| Randfontein | ≈ 9 µg/m³ |
| Alberton | ≈ 22 µg/m³ |
| Mabopane | ≈ 9 µg/m³ |
| Heidelberg | ≈ 16 µg/m³ |
| Edenvale | ≈ 15 µg/m³ |
| Bronkhorstspruit | ≈ 11 µg/m³ |
| Cullinan | ≈ 8 µg/m³ |
| Midstream | ≈ 15 µg/m³ |
| Verena | ≈ 9 µg/m³ |
| Bagale | ≈ 9 µg/m³ |
Bad-air episodes in Gauteng
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
Updated 2026-10-06 23:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.