The $4 Trillion Threat: Why a Global Sewage Treaty is Now on the Table

SAN FRANCISCO, CA – June 12, 2026 – As global leaders, scientists, and industry titans convene in Kenya for the 11th Our Ocean Conference, a topic often relegated to the background is being thrust into the spotlight: sewage. The Ocean Sewage Alliance, backed by a coalition of partners, is making an urgent call for a United Nations Global Sewage Treaty, arguing that this pervasive, yet overlooked, pollutant poses a catastrophic threat to ocean health, global economics, and human well-being.

While public attention has been rightly captured by the visible scourges of plastic pollution and the existential threat of climate change, nearly half of the world's wastewater flows untreated into our rivers, lakes, and oceans. This silent crisis carries an estimated annual price tag of USD $4 trillion in economic damages, from collapsing fisheries to public health emergencies. The upcoming conference, held for the first time on African soil, provides a critical backdrop for this call to action, highlighting a problem that disproportionately affects developing nations but has dire consequences for the entire planet.

"Ocean conservation cannot succeed while billions of gallons of untreated sewage flow daily into our waterways," stated Jasmine Fournier, Executive Director of the Ocean Sewage Alliance. "Sewage pollution is a transboundary crisis. No country can solve it alone. We need the same level of international coordination that has been applied to the high seas, climate change and biodiversity."

A Crisis Made Clear in Kenya

Nowhere is the urgency of this issue more apparent than in the conference's host nation. A recent economic analysis by the Ocean Sewage Alliance and the Back to Blue initiative found that a mere 11% of Kenya's wastewater is treated. The consequences are stark: the report estimates a 5.1% loss in the nation's fisheries economy and an annual economic drain of over USD $65 million from diarrheal diseases linked directly to contaminated water. These figures paint a grim picture of how inadequate sanitation directly undermines livelihoods, food security, and national development.

This local reality is a microcosm of a global challenge. Recent scientific research has exposed how sewage and wastewater pollution are actively undermining the effectiveness of Marine Protected Areas (MPAs), the world's primary tool for marine conservation. The study identified East Africa as one of the regions suffering from the highest wastewater pollution loads, warning that ambitious global goals—like the pledge to protect 30 percent of the ocean by 2030 (30x30)—are fundamentally unachievable without a radical overhaul of wastewater management. The integrity of these protected zones is being compromised from the shore, proving that ocean health is inextricably linked to land-based infrastructure.

Yet, within this challenge lies the seed of opportunity. Local innovation in Kenya provides a powerful counter-narrative. Organizations like Fresh Life, a social enterprise, are demonstrating that scalable, decentralized sanitation solutions are not only possible but profitable. By providing safe, affordable toilets in urban informal settlements and converting waste into valuable products like organic fertilizer, they are creating jobs, improving public health, and preventing pollution at its source.

"The costs of inaction are borne by communities through disease, degraded ecosystems, and lost economic opportunity," said Eric Njogu, Managing Director at Fresh Life. "Our experience delivering safe sanitation solutions in Nairobi and Kisumu demonstrates that scalable solutions exist and can deliver meaningful benefits for communities, public health, and the environment."

Forging a New Global Framework

The proposed Global Sewage Treaty is designed to be the missing piece of the puzzle: a binding international framework to drive investment, innovation, and accountability. The coalition has structured its proposal around six foundational pillars:

1. Build Strong Monitoring Systems: Establish global standards for tracking wastewater discharge and its impact, creating a transparent data ecosystem to guide policy.
2. Update Regulatory Standards: Harmonize and elevate national regulations for wastewater treatment, moving beyond a patchwork of inconsistent rules.
3. Unlock Innovative Financing: Create new financial mechanisms—from blended finance to green bonds—to mobilize the trillions needed for infrastructure upgrades, particularly in the Global South.
4. Set International Targets: Establish clear, time-bound goals for reducing sewage pollution, creating a shared benchmark for progress.
5. Strengthen Governance and Enforcement: Develop robust international bodies and legal mechanisms to ensure compliance and hold nations accountable.
6. Promote Nature-Based Solutions: Champion the use of natural systems like wetlands and mangroves to treat wastewater, offering cost-effective and ecologically beneficial alternatives to traditional infrastructure.

Such a treaty would not exist in a vacuum. It would directly support the achievement of the UN's Sustainable Development Goals, most notably SDG 6 (Clean Water and Sanitation) and SDG 14 (Life Below Water). Proponents argue that without solving the sewage crisis, progress on a host of other global targets—from health and food security to sustainable cities—will remain stalled.

The Business of Clean Water

From a systems perspective, the economic argument is perhaps the most compelling. Viewing sanitation purely as a cost is a fundamental miscalculation. The $4 trillion annual loss represents a massive market failure, but also a significant opportunity. Investing in wastewater infrastructure is not just an environmental imperative; it is a direct investment in economic resilience and growth.

Clean water reduces the burden on healthcare systems. Healthy marine ecosystems support robust tourism and fishing industries. Innovative waste-to-value systems, like those pioneered by Fresh Life, create new revenue streams and circular economies. A global treaty would de-risk these investments, create economies of scale for new technologies, and establish the stable policy environment that long-term capital requires. It reframes sanitation from a line item in a municipal budget to a cornerstone of a modern, sustainable economy.

As the Our Ocean Conference proceeds, the world will be watching to see if this call for a new global pact gains traction. The challenge is immense, but the argument presented by the Ocean Sewage Alliance is clear: the cost of inaction is a debt that is already being paid by the world's most vulnerable communities and the fragile marine ecosystems we all depend on.

"The solutions to sewage pollution already exist," Fournier concluded. "What is missing is the international cooperation needed to scale them. A Global Sewage Treaty would help countries accelerate action and transition toward systems that achieve all SDGs by protecting both people and the ecosystems they depend on."