PM2.5 annual average (μg/m3) over 5 years City markers indicating 2025 PM2.5 levels, size adjusted for population annual concentrations measuring 15.5 μg/m3, a reduction of 3.3 μg/m3 relative to 2024. Despite this progress across0rporingcitisndustraltspotsrmanasignificant conceh suu au ea ot nuuo pii pue alu ie au ym buoe uoi uena yinos most degraded airsheds. In the country's three most severely impacted cities, annual PM2.5 concentrations exceeded allWHO annual PM2.5interim targets and the primary guideline level by more than sevenfold. inPM2.5levels;however,M.5concentrations inBluff,Southfrica's third most poluted city spiked by more than 50% in 2025, marking a severe local deterioration in air quality. Nationaly. Nieuwoudtvill which achieved PM2.5 levelsbelow the WHO5 μg/m annual guideline value. Industrial air polution is primary driver of PM2.5 levels in the most polluted areas of South Africa.A2022 study identified energy production as the nations largest single source of PM2.5, contributing approximately 23% of total concentrations.104 This impact is most evident in The Vaal Triangle, a heavily industrialized hub south of Johannesburg, hosting a high density of coal- fired power plants, steel mil, and petrochemical plants. The industrial burden is equally severe of sub-Saharan Africa's busiest port, recorded asthma rates of over 50% among schoolchildren in Merebank.15 This industrial blight extends even further south to Umkomaas, where massive In April 2025, South Africa's Supreme Court of Appeal (SCA) issued a scathing rebuke aimed at the Ministry of Environmental Affairs, ruling the Ministry failed in their legal duty of creating and enforcing binding air quality regulations in the severely polluted Highveld region.17 The ruling found that despite thedeclarationof Highveld asaPriorityAreain2007,theMinistrhad Annual hours spent at different PM2.5 pollution levels African Constitution, guaranteeing “the right to an environment not harmful to their health or
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