The Basel Convention: Global Controls on Hazardous Waste Management

Every year, the world generates roughly 400 million tonnes of hazardous waste – from toxic chemicals and heavy metals to corrosive industrial byproducts. For decades, much of this waste quietly made its way from wealthier nations to developing countries, where weaker regulations and low disposal costs made dumping easy and cheap. The Basel Convention, adopted in 1989, was the international community’s response to this growing crisis. It remains the most comprehensive global treaty designed to control the movement of hazardous waste across borders and protect both human health and the environment.

Why the world needed the Basel Convention 🔗

Through the 1970s and 1980s, industrialised nations tightened their environmental laws significantly. Regulations like the Resource Conservation and Recovery Act (RCRA) in the United States drove up hazardous waste disposal costs. At the same time, globalisation made international shipping cheaper and easier. The result was predictable: waste traders began looking for the lowest-cost option, and that often meant sending toxic materials to countries in Africa, Eastern Europe, and Asia where environmental oversight was minimal.

Several high-profile incidents brought this problem to global attention. In one well-known case, a ship called the Khian Sea carried incinerator ash from Philadelphia and dumped part of its cargo on a beach in Haiti before wandering the oceans for months, unable to offload the rest. In another case in 1988, thousands of barrels of hazardous waste from Italy were shipped to the Nigerian town of Koko and stored on a farmer’s land for a token monthly payment. These incidents sparked outrage and demands for regulation.

The public outcry, combined with what became known as the NIMBY (Not In My Back Yard) syndrome in wealthy nations, created the political momentum for a binding international agreement. Negotiations took place under the United Nations Environment Programme (UNEP), and on 22 March 1989, the Basel Convention was adopted in Basel, Switzerland. It entered into force on 5 May 1992.

Purpose and scope of the convention 🔗

The Basel Convention has a clear overarching goal: to protect human health and the environment from the harmful effects of hazardous waste generation, management, transport, and disposal. Its scope covers a wide range of materials classified as hazardous based on their origin, composition, or characteristics – including substances that are toxic, poisonous, explosive, corrosive, flammable, or infectious.

Three core objectives 🔗

The treaty is built around three principal aims. First, it seeks to reduce hazardous waste generation at the source and promote environmentally sound management (ESM) of such waste, regardless of where disposal takes place. Second, it aims to restrict the transboundary movement of hazardous waste, allowing it only when the movement is consistent with sound environmental management. Third, it establishes a regulatory system that governs those cases where cross-border transport is permitted.

Over the years, the convention’s scope has expanded. It now also covers household waste, incinerator ash, certain plastic wastes, and certain categories of electrical and electronic waste. As of 2024, there are 191 parties to the treaty. Notably, the United States has signed but never ratified the convention.

How transboundary movements are regulated 🔗

The regulatory framework of the Basel Convention is centred on the principle of prior informed consent (PIC). This means that before any hazardous waste can be exported, the exporting country must formally notify the importing country and any transit countries. These countries must receive detailed information about the waste – its type, quantity, origin, proposed route, and disposal method – and provide written consent before the shipment can proceed.

Key prohibitions under the convention 🔗

The convention includes several outright bans. Hazardous waste cannot be exported to Antarctica under any circumstances. It also cannot be sent to a country that is not a party to the convention or to any party that has enacted a domestic ban on hazardous waste imports. Additionally, the convention prohibits export if the exporting country has reason to believe the waste will not be managed in an environmentally sound manner at the destination.

Countries can still enter into bilateral or multilateral agreements for waste management with other parties or even non-parties, but such agreements must meet standards that are no less protective than those set by the Basel Convention itself. For example, the Organisation for Economic Co-operation and Development (OECD) has a separate waste control system that functions as an Article 11 agreement, enabling waste trade among its member states under comparable environmental standards.

Obligations for parties 🔗

Beyond the PIC system, the convention requires parties to take several important steps. They must minimise hazardous waste generation domestically. They must ensure waste is treated and disposed of as close as possible to where it was generated – a principle known as the proximity principle. And they must cooperate in monitoring illegal traffic, which the convention treats as a criminal activity requiring prosecution.

The Ban Amendment: closing the loophole 🔗

When the Basel Convention was first adopted, critics – particularly developing nations and environmental organisations – argued that it did not go far enough. The PIC system allowed waste exports to continue as long as importing countries consented. But in practice, many developing countries lacked the institutional capacity to properly evaluate risk or refuse shipments. Waste traders also exploited the system by mislabelling hazardous shipments as recyclable materials.

This led to sustained advocacy for a total ban on hazardous waste exports from rich countries to poorer ones. Regional agreements like the Bamako Convention in Africa had already taken stronger positions. At the third Conference of the Parties (COP3) in 1995, delegates adopted the Ban Amendment to the Basel Convention.

What the Ban Amendment does 🔗

The Ban Amendment prohibits the export of all hazardous wastes – whether for final disposal, recycling, or recovery – from countries listed in Annex VII of the convention (essentially EU, OECD member states, and Liechtenstein) to all other countries. This was a significant strengthening of the original convention, which had only required consent rather than imposing an outright prohibition.

However, the Ban Amendment had a difficult journey to enforcement. It required ratification by three-quarters of the parties present at the 1995 meeting. It was not until 5 December 2019 – more than 24 years later – that it finally entered into force as international law. Countries like the United States, Canada, Japan, and Australia have not ratified the Ban Amendment.

The growing challenge of electronic waste 🔗

One of the most pressing issues under the Basel Convention today is e-waste. Discarded electronics – computers, smartphones, televisions, refrigerators – represent the fastest growing waste stream globally. E-waste contains hazardous materials like mercury, lead, cadmium, and brominated flame retardants. At the same time, it holds valuable resources such as gold, copper, palladium, and rare earth elements.

The problem is that much of this e-waste ends up in developing countries where it is processed by informal workers using crude, dangerous methods – open burning of circuit boards, acid baths to extract metals, or manual dismantling without protective equipment. This exposes workers and surrounding communities to severe health risks and contaminates soil and water.

E-waste amendments of 2022 🔗

The original Basel Convention only controlled e-waste classified as hazardous. Non-hazardous electronic waste could be traded freely across borders with minimal oversight. To address this gap, parties at COP15 in 2022 adopted amendments that brought all e-waste – both hazardous and non-hazardous – under the convention’s PIC procedure. These amendments became effective on 1 January 2025.

Under the new rules, any international shipment of e-waste or electronic scrap for recycling or disposal requires prior written consent from the importing country. This is significant because it means governments now have the power to refuse e-waste imports they cannot manage safely, closing a major loophole that had allowed unrestricted cross-border movement of non-hazardous electronics.

The role of the Basel Action Network (BAN) 🔗

While the Basel Convention provides the legal framework, its effectiveness depends heavily on monitoring, enforcement, and advocacy. This is where the Basel Action Network (BAN) plays a critical role.

Founded in 1997 and headquartered in Seattle, Washington, BAN is the world’s only organisation exclusively focused on combating toxic waste trade. It operates as an unofficial watchdog for the Basel Convention, working to prevent illegal waste dumping and promote environmental justice.

BAN’s key activities 🔗

BAN focuses on three major toxic waste streams covered by the convention: electronic waste, end-of-life ships, and plastic pollution. Its work spans policy advocacy, investigative research, and market-based solutions.

On the policy front, BAN has been present at every Conference of the Parties meeting since the convention began. It actively negotiates for stronger export controls and defends the interests of developing countries facing pressure from industry groups that prefer unrestricted trade. BAN was one of the key advocates behind the Ban Amendment and continues to push for its universal ratification.

BAN’s investigative work has been particularly impactful. Using GPS tracking devices placed inside donated electronics, BAN has documented how e-waste delivered to recyclers in the United States often ends up being exported to countries in Asia and Africa. One investigation revealed that around 40% of e-waste given to U.S. recyclers was shipped overseas to developing countries for processing in unsafe, polluting operations. These findings have led to government enforcement actions, policy changes, and public awareness campaigns in multiple countries.

The e-Stewards certification programme 🔗

BAN also runs the e-Stewards Certification Programme, which sets the industry’s highest standard for responsible electronics recycling. The programme certifies recyclers who commit to not exporting hazardous e-waste to developing countries and who follow strict environmental and worker safety protocols. For businesses and consumers, choosing an e-Stewards certified recycler is one of the most practical ways to ensure old electronics are handled responsibly.

In recent years, BAN has also expanded its efforts into plastic waste tracking and green ship recycling. Through its advocacy work with UNEP, the OECD, and various governments, BAN continues to be a driving force in the fight against global toxic waste dumping.

Challenges and limitations of the Basel Convention 🔗

Despite its achievements, the Basel Convention faces ongoing challenges. Implementation varies widely across countries. Many developing nations lack the financial resources, trained personnel, and institutional infrastructure needed to enforce the convention’s requirements effectively. Technical guidelines developed at international meetings are of limited use to countries that cannot afford to apply them.

Illegal traffic remains a persistent problem. Waste traders continue to find ways around controls – mislabelling hazardous shipments, mixing waste with recyclable materials, or routing shipments through countries with weaker enforcement. The convention’s effectiveness also depends on domestic policy alignment, and differences in regulation standards, labelling procedures, and enforcement capacity among member states undermine its overall impact.

Another significant limitation is the non-participation of the United States. As one of the world’s largest waste generators, the absence of the U.S. from the treaty creates a substantial gap in the global framework. While U.S. waste exports are still affected by the convention – since importing countries apply their own Basel obligations – the lack of direct U.S. commitments remains a concern for environmental advocates.

Looking ahead 🔗

The Basel Convention has evolved considerably since 1989. What began as a response to toxic waste dumping in Africa has grown into a comprehensive framework covering hazardous waste, e-waste, and plastic pollution. The 2019 entry into force of the Ban Amendment and the 2025 e-waste amendments mark significant progress in tightening global controls.

Yet the core challenge remains: ensuring that the waste generated by wealthy, industrialised nations does not disproportionately harm the health and environment of poorer communities. As global waste volumes continue to rise – driven by increasing consumption, rapid technological obsolescence, and urbanisation – the Basel Convention and organisations like BAN will remain essential to holding governments and industries accountable.

What do you think? Should countries that have not ratified the Basel Convention or its Ban Amendment – particularly major waste producers like the United States – face international pressure to join? And in your view, is the prior informed consent system sufficient to protect developing nations, or does it still leave too much room for exploitation?

References

1. https://www.basel.int/theconvention/overview/tabid/1271/default.aspx
2. https://en.wikipedia.org/wiki/Basel_Convention
3. https://www.unep.org/resources/report/basel-convention-control-transboundary-movements-hazardous-wastes
4. https://www.basel.int/implementation/ewaste/overview/tabid/4063/default.aspx
5. https://www.state.gov/key-topics-office-of-environmental-quality-and-transboundary-issues/basel-convention-on-hazardous-wastes
6. https://shipbreakingplatform.org/ban-amendment/
7. https://www.gefislands.org/policies-and-regulations/basel-convention-control-transboundary-movements-hazardous-wastes-and-their
8. https://www.epa.gov/hwgenerators/new-international-requirements-electrical-and-electronic-waste
9. https://www.ban.org/about-us
10. https://ipen.org/news/ban-press-release-global-ban-exporting-hazardous-waste-developing-countries-close-becoming-law
11. https://www.ban.org/advocacy/
12. https://www.csis.org/analysis/basel-convention-hazardous-waste-plastic-pollution