SmogRank / World / Africa / South Africa / Free State

Most polluted cities in Free State, South Africa

0 measured cities, last 24 hours.

No city has enough measurements for this window yet.

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

Estimated: cities without a monitor

Free State 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	Band
Bloemfontein	≈ 8 µg/m³	Low risk
Welkom	≈ 12 µg/m³	Low risk
Botshabelo	≈ 8 µg/m³	Low risk
Virginia	≈ 12 µg/m³	Low risk
Kroonstad	≈ 12 µg/m³	Low risk
Kutloanong	≈ 12 µg/m³	Low risk
Bethlehem	≈ 10 µg/m³	Low risk
Phuthaditjhaba	≈ 10 µg/m³	Low risk
Odendaalsrus	≈ 12 µg/m³	Low risk
Thaba Nchu	≈ 8 µg/m³	Low risk
Bothaville	≈ 12 µg/m³	Low risk
Parys	≈ 15 µg/m³	Low risk
Viljoenskroon	≈ 12 µg/m³	Low risk
Ficksburg	≈ 12 µg/m³	Low risk
Wesselsbron	≈ 11 µg/m³	Low risk
Senekal	≈ 11 µg/m³	Low risk
Theunissen	≈ 10 µg/m³	Low risk
Harrismith	≈ 11 µg/m³	Low risk
Heilbron	≈ 14 µg/m³	Low risk
Allanridge	≈ 12 µg/m³	Low risk
Frankfort	≈ 15 µg/m³	Low risk
Ladybrand	≈ 11 µg/m³	Low risk
Bultfontein	≈ 9 µg/m³	Low risk
Phomolong	≈ 12 µg/m³	Low risk
Reitz	≈ 11 µg/m³	Low risk
Deneysville	≈ 17 µg/m³	Low risk
Hennenman	≈ 12 µg/m³	Low risk
Vrede	≈ 11 µg/m³	Low risk
Hlohlolwane	≈ 11 µg/m³	Low risk
Villiers	≈ 13 µg/m³	Low risk
Hoopstad	≈ 11 µg/m³	Low risk
Zastron	≈ 7 µg/m³	Low risk
Marquard	≈ 11 µg/m³	Low risk
Tshiame	≈ 10 µg/m³	Low risk
Vredefort	≈ 12 µg/m³	Low risk
Winburg	≈ 10 µg/m³	Low risk
Koppies	≈ 13 µg/m³	Low risk
Fouriesburg	≈ 10 µg/m³	Low risk
Winnie Mandela	≈ 8 µg/m³	Low risk
Mamafubedu	≈ 12 µg/m³	Low risk

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SmogRank, most polluted cities in Free State, South Africa, PM2.5, last 24 hours to 2 Oct 2026, 05:00 UTC, smogrank.com/za/region/free-state.

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Updated 2026-10-02 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the Canada AQHI+ PM2.5 sub-index.