Over the past few months, I have been inundated with calls, emails, public engagements and social media messages from South Africans deeply concerned about the condition of Hartbeespoort Dam. Some messages come from residents frustrated by the visible spread of hyacinth and pollution. Others come from business owners, environmental activists, scientists and ordinary citizens who simply want to see one of South Africa’s most iconic water bodies restored to health. In many instances, people do not only raise concerns, but they also offer solutions.
I have received proposals ranging from mechanical interventions and chemical applications to unconventional experimental approaches from individuals convinced that they have discovered the breakthrough needed to solve the emergency at Hartbeespoort Dam. I genuinely value this level of public interest because it reflects a society that still cares deeply about environmental protection and the future of our water resources.
As much as innovation and bold thinking must be encouraged, government cannot implement every proposed intervention without rigorous scientific assessment, environmental oversight and consideration of long-term ecological consequences. Some solutions may appear attractive in the short term while carrying significant environmental risks in the future. Others may unintentionally worsen the ecological imbalance we are trying to correct. Responsible governance therefore requires us to distinguish between interventions driven by evidence and those driven primarily by desperation or risk-taking.
Hartbeespoort Dam’s recovery matters to me not only as Deputy Minister of Water and Sanitation, but also as someone who believes deeply in protecting spaces that bring communities, recreation and nature together. Beyond my responsibilities, I am someone who strongly values the role that dams and water bodies play in recreation, tourism, community life and social wellbeing.
I have visited Hartbeespoort Dam on numerous occasions over recent months. Each visit has reinforced both the urgency of the crisis and the importance of ensuring that our interventions are credible, sustainable and guided by science. This is precisely why government has adopted a comprehensive, evidence-based approach grounded in collaboration with water experts, implementing agencies and the academic sector.
This piece is therefore intended not only to update the public on the progress being made, but also to explain why the rehabilitation of Hartbeespoort Dam requires disciplined, science-based and long-term intervention rather than short-term reactions.
For too long, Hartbeespoort Dam stood as a visible reminder of environmental decline, weak enforcement and institutional failure. Invasive hyacinth spread aggressively across the water surface, pollution continued to flow into the system from upstream catchments and many South Africans began to accept deterioration as inevitable. And as Government, we cannot afford to normalise environmental collapse.
The progress now being achieved at Hartbeespoort Dam demonstrates that when government institutions act decisively, apply science-based interventions and enforce accountability, environmental recovery is possible.
Since April 2023, the Department of Water and Sanitation appointed Magalies Water as the implementing agent responsible for water resource planning and management in the upper Crocodile West River Catchment and Hartbeespoort Dam. This intervention was deliberately designed as a comprehensive turnaround programme aimed not only at cleaning the dam, but at restoring ecological stability, improving water quality, strengthening governance and rebuilding public confidence in government’s ability to protect strategic water systems.
Importantly, this work forms part of a broader government commitment to rebuilding state capacity in the water sector through implementation, innovation, scientific collaboration and stronger enforcement.
One of the most important lessons from Hartbeespoort Dam is that environmental rehabilitation cannot succeed through fragmented responses. Removing visible hyacinth without addressing upstream pollution would simply recycle the same crisis year after year. Sustainable recovery requires us to confront the root causes of ecological degradation directly and without compromise.
This is why the current programme integrates physical removal operations, biological control, advanced monitoring systems, pollution tracking, nutrient reduction strategies and long-term water resource management planning.
A defining feature of this work has been the strong partnership between government and the academic and scientific sectors. Complex environmental challenges require evidence-based governance informed by research, innovation and scientific expertise. Government alone cannot solve these problems in isolation.
Our collaboration with specialists from Rhodes University has played a critical role in advancing biological control interventions through the release of Megamelus scutellaris agents to suppress water hyacinth growth sustainably over time. Academic expertise has also supported scientific monitoring, ecological modelling and the evaluation of intervention effectiveness.
Equally important has been the introduction of innovative technologies such as nanobubble systems designed to improve oxygenation levels and reduce nutrient concentrations contributing to eutrophication and excessive biomass growth. This partnership between government institutions, water entities and academia reflects the type of collaborative
governance South Africa must continue strengthening if we are serious about protecting long-term water security. This is why the results achieved thus far are encouraging and measurable.
During the peak growth season between September 2025 and January 2026, intensified operations removed more than 1,292 hectares of water hyacinth from the dam system through a combination of excavators, barges, manual teams and containment infrastructure deployed at critical hotspots. Approximately 350,000 Megamelus scutellaris biological control agents have also been released into the system since September 2025 to reduce future hyacinth regeneration naturally and sustainably.
Monitoring linked to nanobubble technology interventions is also indicating notable reductions in ammonia, nitrite and orthophosphate concentrations within treatment zones, while dissolved oxygen levels remain within healthy aerobic conditions. These developments are important because they reflect gradual progress in stabilising the nutrient imbalances driving eutrophication.
Beyond the environmental gains, the rehabilitation of Hartbeespoort Dam carries significant economic importance. A healthy and functioning dam system supports tourism, protects surrounding livelihoods, strengthens local economic activity and contributes to the sustainability of businesses and communities dependent on the water resource.
But while progress is evident, I must be clear that the full ecological recovery of Hartbeespoort Dam remains a long-term undertaking that will require sustained implementation, continued investment and unwavering political commitment.
As a Ministry of Department of Water and Sanitation, we remain fully committed to continuing this work comprehensively and without interruption. We will intensify monitoring capacity, strengthen scientific partnerships, expand biological interventions and increase compliance inspections throughout the catchment. There will be no retreat from this responsibility. At the
same time, municipalities, industries, upstream water users and surrounding communities must recognise that rehabilitation is a shared national responsibility.
Municipal failure to prevent untreated effluent from entering river systems can no longer be accepted as routine administrative dysfunction. Industries and authorised water users must comply fully with discharge regulations and environmental obligations.
The Department has already intensified enforcement and compliance actions because upstream pollution remains one of the greatest threats to the long-term recovery of Hartbeespoort Dam. More than 35 water quality monitoring points remain active throughout the catchment to strengthen pollution tracking and regulatory oversight. As part of this project, 27 authorised water users have been audited, while 25 facilities have been investigated for possible non-compliance. Furthermore, 20 compliance notices and two directives have been issued against offending users. The Department has also opened six criminal cases against municipalities and one against an individual linked to pollution-related violations, although some of these cases were initiated prior to the commencement of the current rehabilitation project.
Our message is therefore unequivocal: Polluting South Africa’s water resources is not a minor offence, but an attack on public health, environmental sustainability and the future security of our country. Those responsible for environmental violations will increasingly face enforcement action and legal consequences.
The rehabilitation of Hartbeespoort Dam must serve as a national demonstration of what becomes possible when scientific innovation, decisive governance, rigorous enforcement and active public participation converge around a shared purpose. While meaningful progress has been made in reversing years of ecological decline, sustaining and expanding these gains demands unwavering vigilance, greater accountability and collective commitment from all sectors of society.
Future generations will judge us not by the scale of the environmental problems we inherited, but by the seriousness and determination with which we responded to them. The restoration of Hartbeespoort Dam is therefore no longer simply an environmental project, but a test of South Africa’s collective ability to protect and rebuild the natural resources upon which our future depends.
By Deputy Minister of Water and Sanitation, Sello Seitlholo
