Under the Table: Inside Ghana’s Mercury Supply Chain — And the Chemical Lever That Could Break Galamsey

The substance behind the gold

Mercury rarely draws attention in Ghana’s illegal mining debate. It does not tear through forests like excavators or choke rivers with sediment. It moves quietly, often in recycled bottles, traded in small quantities, handled in open markets. Yet it is the most critical input in small-scale gold extraction.

In mining communities across the Western, Ashanti, Eastern and Central Regions, mercury is what makes gold visible. When mixed with crushed ore, it binds instantly with fine gold particles to form an amalgam. Heated over charcoal, the mercury evaporates, leaving behind gold ready for sale.

This process is simple, cheap, and accessible.It is also illegal outside regulated channels.

Under Ghana’s Mercury Law, PNDCL 217, only licensed entities can import, distribute, or use mercury under controlled conditions. In practice, the law governs only a fraction of the market.

The rest operates in the shadows.

An invisible supply chain

Official import records tell one story. Field evidence tells another.

Between 2019 and 2023, Ghana recorded relatively small volumes of mercury imports. But artisanal mining activity across the country suggests consumption far exceeds those figures.

The gap is explained by an entrenched informal supply chain:

• Cross-border smuggling through Togo, Côte d’Ivoire, and Burkina Faso, often mislabelled as industrial fluids or chemicals
• Unregistered dealers operating in mining hubs like Tarkwa, Dunkwa-on-Offin, and Obuasi
• Leakage from licensed import channels into informal distribution networks

Once inside Ghana, mercury disperses rapidly. It is sold in ounces, redistributed through middlemen, and absorbed into mining communities where oversight is minimal.

No central system tracks its movement. No institution controls the full chain.

The chemical choke point

Policy responses to galamsey have historically focused on visible assets: excavators, dredging equipment, and mining sites.

Mercury sits outside that frame. But unlike heavy machinery, mercury is:

• Lightweight and traceable
• Concentrated in fewer entry points
• Essential to gold recovery for small operators

This makes it a strategic control point.

A Minerals Commission officer put it bluntly: control mercury, and you control the gold.

Without access to mercury, informal miners face a constraint they cannot easily bypass. Production slows. Recovery efficiency drops. The economics weaken.

At that point, operators are forced toward two options: formalisation under regulated systems, or exit.

Where enforcement breaks down

Despite clear legal restrictions, mercury enforcement in Ghana is structurally weak. The problem is not the absence of rules, but the fragmentation of control.

Fragmented oversight
Responsibility is distributed across multiple agencies: the Trade Ministry, the Environmental Protection Agency, Minerals Commission, Customs, Police, and local authorities. Each monitors a segment. None governs the system end to end.

Outdated legal architecture
PNDCL 217 predates the scale and complexity of modern galamsey. It does not account for transnational smuggling, digital tracking, or integrated enforcement.

Distorted incentives
On the black market, mercury can sell for between GH₵ 3,000 and 5,000 per kilogram. Penalties for illegal possession remain relatively low. The risk-reward balance favours continued trade.

The result is predictable: enforcement exists, but control does not.

From river to bloodstream

The environmental consequences are already measurable. In river systems such as the Ankobra, Pra, Offin, and Birim, mercury concentrations have been recorded above safe thresholds by national regulators and aligned with global benchmarks set by the World Health Organization. The contamination chain is direct:

• Mercury enters rivers during processing
• It settles into sediment and aquatic systems
• It accumulates in fish and farmland
• It enters the human body through food and water

In mining communities, exposure is not abstract. Miners handle mercury with bare hands. Vapour is inhaled during burning. Residues persist in soil and water sources used daily. A 2024 study by Pure Earth and the EPA identified elevated mercury and arsenic levels in biological samples from residents in mining zones.

Health workers report rising cases of:

• Kidney dysfunction
• Neurological impairment
• Memory loss
• Developmental complications in children

Mercury does not dissipate. It accumulates.

From enforcement to system design

If mercury is the leverage point, then the response must shift from reactive enforcement to system control. A functional framework would include:

Digital Mercury Registry
A national system logging every unit imported, sold, and purchased, linking actors across the chain.

Licensed Buyer Identification
Restrict access to certified small-scale miners operating within environmental compliance frameworks.

Dealer Transition Pathways
Structured incentives to shift toward mercury-free alternatives, including borax-based recovery and emerging non-toxic leaching methods.

Border Integration
Incorporation of mercury into controlled chemical monitoring systems with scanning, tagging, and audit protocols.

Local Enforcement Layers
Empowering district assemblies and traditional authorities to define and enforce mercury-free zones.

The objective is not prohibition. It is control.

A different battlefield

Galamsey has often been treated as a territorial problem. Raids target sites. Equipment is seized. Operations relocate.

The system adapts faster than enforcement.

Mercury shifts the battlefield.

It targets the process, not the place. The input, not the operator. The chemistry, not the terrain.

Countries such as Tanzania, Indonesia, and the Philippines have reduced mercury dependence not through militarisation, but through tracking systems, regulatory alignment, and viable alternatives.

Ghana has already committed to this pathway under the Minamata Convention on Mercury.

Implementation remains the gap.

The lever Ghana has not pulled

Every vial of mercury circulating in Ghana represents a chain reaction: extraction, contamination, accumulation.

The current strategy fights symptoms. Mercury control targets the mechanism.If the state can see it, track it, and restrict it, the economics of illegal mining begin to shift. Not through force, but through constraint. The fight against galamsey may not be won in the forests or along riverbanks. It may be decided at the point of sale — in small bottles, passed quietly, under the table.

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