We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
From Source to Sea: The Role of River Basins in Marine Pollution Under Development and Climate Change Variability in SADC
AI summary Read the abstract
This review of 30 studies found that rivers in Southern Africa are carrying plastics, chemicals, and untreated sewage into the ocean, largely because many cities lack proper wastewater treatment and pollution laws aren't well enforced across borders. This matters because these pollutants—including microplastics—end up in coastal waters where people fish and swim, and climate change is making the problem worse by triggering more floods and straining already weak sanitation systems.
This article presents a systematic review of land-based marine pollution in the Southern African Development Community (SADC), focusing on the river–sea interface. Using the PRISMA protocol, 30 articles published between 2015 and 2025 were selected. Key pollutants identified include microplastics, nutrients, heavy metals, and urban effluents, which travel through river basins and impact coastal ecosystems and communities. The region faces serious challenges due to limited wastewater treatment coverage, with many urban areas lacking adequate infrastructure or using outdated technologies. This leads to widespread discharge of untreated effluents into rivers. Fragmented governance, weak institutional capacity, and insufficient implementation of regional treaties further hinder pollution control. Climate change exacerbates these pressures by increasing hydrological extremes and the vulnerability of sanitation systems. Despite existing legal instruments, cooperation on monitoring and wastewater management remains limited. The integration of basin and coastal planning, improved governance, and transboundary collaboration are essential to reduce pollution and promote ecological and social resilience in the region.
More Papers Like This
Microplastics in South African Aquatic Environments: A Systematic Review of Spatial Distribution, Analytical Methods, and Research Trends (2012–2025)
AI summary Read the abstract
This review pulls together 28 studies to show that microplastics, tiny plastic bits from broken-down waste, are widely present in South Africa's rivers, coastlines, and even wastewater, but research has mostly focused on a few coastal cities while inland areas remain a blind spot. Since these plastics have been found in water and food sources people rely on, and South Africa currently has no official rules for tracking or limiting them, this matters for making sure contamination doesn't go unnoticed or unmanaged. The takeaway: we know microplastics are out there, but inconsistent testing methods and gaps in monitoring mean the full picture
Riverine Microplastics in South Africa: Unravelling Pollution Sources from Source to Sediment
AI summary Read the abstract
Scientists found high levels of tiny plastic particles called microplastics in two South African rivers, with the worst pollution coming from industrial areas and farms. These microscopic plastic pieces can end up in drinking water and the food chain, potentially affecting human health. The study shows that different human activities create different types of plastic pollution, which means we need targeted solutions to clean up our water sources.
An overview of the prevalence of micro- and nanoplastics in the Southern African development community: a potential risk to environmental and public health
AI summary Read the abstract
This systematic review examined micro- and nanoplastic pollution across Southern Africa's freshwater systems. Rivers, lakes, and wetlands that communities depend on for drinking water and food production were found to be contaminated. Rapid urbanization and poor waste management are driving the problem, raising concerns about public health in the region.
Effects of urbanisation and a wastewater treatment plant on microplastic densities along a subtropical river system
AI summary Read the abstract
Researchers quantified microplastic pollution in sediments along a subtropical river system in southern Africa and examined how urbanization and wastewater treatment affect contamination levels. They found that microplastic densities were highest near urban areas and downstream of wastewater treatment plants. The study suggests that urban development and inadequate wastewater infrastructure are key drivers of freshwater microplastic pollution in the region.
Microplastic occurrence and fate in the South African environment: a review
AI summary Read the abstract
This review summarizes microplastic contamination across South Africa's freshwater, marine, and air environments. Researchers found microplastics in drinking water samples from major cities, with marine sediment levels along the southeast coast reaching particularly high concentrations. The findings emphasize the need for better wastewater treatment, stronger laws on single-use plastics, and more research on how this contamination affects human health.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.