SOUTH AFRICA — South Africa’s water pollution crisis is escalating into a severe threat to national food security and agricultural production, according to the Co-Director of the DSI-NRF Centre of Excellence in Food Security at the University of the Western Cape. The declining quality of the country’s river and wastewater systems is now directly impacting the safety of food consumed domestically and exported internationally.
Alarming National Water Statistics
Recent Green Drop and Blue Drop audit reports highlight a stark infrastructure failure. In 2025, 47% of the country’s wastewater treatment works were classified in a critical state, resulting in the frequent discharge of raw or partially treated sewage into river systems. Conversely, only 8% of these facilities were rated as good or excellent.
The national impact on river ecosystems is profound, with an estimated 60% of rivers now classified as moderately to heavily polluted. This degradation is also severely impacting drinking water quality. The 2025 Blue Drop reports indicate that nearly half (49%) of drinking water systems face a high-risk microbial ranking, marking a significant and concerning increase from 2023 results. While major cities are somewhat buffered from the worst effects, the broader agricultural and rural impacts are accelerating.
Threats to Agriculture and Export Markets
Because irrigation and livestock watering rely heavily on river and dam systems, contaminated water poses a massive risk to agricultural production. Farmers are required to ensure their water is potable; if it is not, the contamination directly impacts the safety of the produce grown on their land.
Experts warn that the country is building toward major regulatory “red flags” in international trade. Export markets, particularly the European Union, enforce stringent produce safety requirements. Furthermore, exporting farmers typically hold Global GAP certification, an internationally accepted standard that mandates regular water testing to ensure safety. If water sources are deemed unsafe, it raises immediate concerns about the introduction of foodborne pathogens, heavy metals, and chemicals from industrial and mining activity, as well as untreated municipal sewage. This could result in severe market backlash and lost export revenue if a strategic national plan is not implemented.
Areas with heavy farming activity, such as Bronkhorstspruit, are already experiencing heightened concerns regarding contaminated water sources, with fears that the situation will deteriorate further without immediate intervention.
Public Health and Antimicrobial Resistance
Beyond standard foodborne pathogens, the pollution introduces complex health risks. A particularly alarming consequence is the rise of antimicrobial resistance (AMR). Microbes carrying AMR genes are accumulating and multiplying in polluted water hotspots, transferring these resistant genes. This poses a massive “One Health” threat to humans, complicating medical treatments and raising the critical concern of infections that no longer respond to available antibiotics.
Rising Food Costs and Economic Strain
The economic fallout of the water crisis will inevitably be passed down to the consumer through increased food prices. To ensure water is safe, commercial farms must invest heavily in purification and filtration systems, driving up input costs. If contaminated produce is rejected by retailers—who are enforcing increasingly high standards and testing protocols—the financial loss for the farmer is compounded.
Small-scale farmers, who often lack the capital to invest in water purification systems, are frequently forced to use river or dam water directly on their crops. This not only increases the risk of contaminated food entering informal markets but also causes long-term damage to agricultural soil and production systems. Ultimately, the increased costs of production, testing, and the medical costs associated with foodborne illnesses will result in higher prices for the end consumer.
Accountability and the Path Forward
Addressing the crisis requires a unified “One Health” approach, ensuring various government departments collaborate to safeguard both water and food. Regulatory responsibility lies primarily with the Department of Water and Sanitation and local health departments, which are tasked with monitoring and enforcement.
However, accountability must also reach the operational level. Wastewater treatment plant operators must strictly comply with discharge standards, as they can be held legally accountable for failures. Additionally, the mining and industrial sectors bear a significant responsibility to prevent chemical runoff.
Experts emphasize that bridging the information gap at the farm and consumer levels, restoring public trust, and enforcing strict environmental accountability across all sectors are critical steps to halting the decline of the country’s vital water resources. Every individual and industry must be held accountable for respecting and protecting water sources from further contamination.
