Clean water is often discussed as a public health necessity, but its role in food production is equally critical. In a recent interview with Prof Lise Korsten, Fellow of the African Academy of Sciences (AAS) and Co-Director of the DSI-NRF Centre of Excellence in Food Security, the far-reaching consequences of polluted rivers on food systems came sharply into focus.

Across Africa, rivers serve as a lifeline for agriculture. They provide water for irrigation, support livestock production, and underpin the livelihoods of millions of farmers. However, growing levels of pollution from untreated wastewater, industrial discharge, mining activities, and agricultural runoff are placing these vital water resources under increasing strain. According to Prof Korsten, declining water quality is no longer only an environmental concern. It is a food security challenge with direct implications for human health, agricultural productivity, and economic development.

The consequences extend beyond farms and consumers. Water pollution can undermine confidence in agricultural exports, threaten compliance with international food safety standards, and increase production costs for farmers who must implement additional monitoring and treatment measures. For countries seeking to strengthen food systems and expand agricultural trade, maintaining water quality is becoming increasingly important.

Prof Korsten emphasised that addressing water pollution requires coordinated action across sectors. Investments in wastewater treatment infrastructure, stronger environmental regulation, improved water monitoring systems, and evidence-based policymaking are all essential to safeguarding both water resources and food production systems. Scientific research plays a crucial role in identifying risks, developing solutions, and informing decisions that protect public health and support sustainable agriculture.

As Africa works towards achieving food security and climate resilience, the message is clear: healthy rivers are foundational to healthy food systems. Protecting water quality is not simply an environmental responsibility. It is an investment in the health, prosperity, and future of communities across the continent. Through science-led action and collaboration, Africa can build more resilient food systems while safeguarding one of its most valuable resources: clean water.

Full interview can be found on SABC News YouTube channel.