Water & Environment

In 1997, New York City faced a choice: build a $10 billion filtration plant, or pay Catskill farmers to protect the watershed naturally. They chose payments—$1.5 billion over 10 years—and avoided the plant entirely. The program demonstrates economic PSC: ongoing payments to maintain ecosystem services are cheaper than capital-intensive infrastructure, and the payments regenerate through avoided costs.

• Avoided $10B filtration plant
• $1.5B in watershed payments instead
• Farmers paid for ecosystem services

Costa Rica's Payments for Ecosystem Services (PES) program is one of the world's most successful conservation finance mechanisms. By paying landowners to maintain forests, the program helped forest coverage recover from 21% in 1987 to 52% today. Funded by a fuel tax, it demonstrates that environmental protection can be financed through economic mechanisms that align private incentives with public goods. The model has been replicated across Latin America and beyond.

• Forest coverage: 21% → 52%
• Fuel tax funds conservation
• Landowner payments

The Dutch Water Boards (waterschappen) are the oldest democratic institutions still operating today. Founded in 1255, they have managed flood control and water quality through every political regime change in Dutch history—feudalism, Spanish rule, French occupation, two world wars, and modern democracy. The secret: water management is structurally decoupled from political cycles because everyone drowns equally. Funding comes from property levies (not government budgets), and governance is by election among all affected parties.

• 769 years of continuous operation
• Oldest democratic institutions on Earth
• Survived every political regime change

The Murray-Darling Basin Plan manages water across Australia's largest river system—1 million square kilometers across 4 states. It introduced water trading and environmental water allocations, attempting to balance agricultural, urban, and environmental needs. While controversial (critics say environmental allocations are insufficient), it represents one of the world's most ambitious attempts to manage water as a scarce, tradeable resource with environmental protections.

• 1M km² river basin
• Water trading markets
• Environmental water allocations

PlayPumps were merry-go-rounds that pumped water when children played on them. Backed by celebrities and $60M+ in funding, the idea seemed brilliant—children's play generates clean water. Reality was different: pumps were expensive, broke frequently, required adult labour not play to generate enough water, and ignored that many communities already had functioning wells. When celebrity funding moved on, communities were left with broken equipment. PlayPumps shows how feel-good design can ignore community context.

• $60M+ in celebrity backing
• ~4,000 pumps installed
• Pumps expensive ($14,000 vs $2,000 hand pump)

The Thames Tideway Tunnel is London's £4.5B 'super sewer'—a 25km tunnel that will prevent millions of tonnes of sewage from overflowing into the Thames each year. Financed through a special ring-fenced company with regulated returns, it demonstrates how essential infrastructure can attract private capital while maintaining public benefit. The 100-year design life means generations of Londoners will benefit from this single investment.

• 25km super sewer tunnel
• £4.5B investment
• 100-year design life

The Nature Conservancy's Water Funds model creates perpetual financing for watershed protection. Downstream water users (cities, utilities, businesses) pay into a trust fund that compensates upstream landowners for conservation practices—protecting forests, restoring wetlands, managing agriculture sustainably. The model started in Quito, Ecuador and has spread to 40+ cities across Latin America, Africa, and Asia. It's PSC applied to natural capital: the watershed corpus is preserved while benefits flow perpetually to downstream users.

• 40+ water funds globally
• $200M+ invested
• Downstream pays upstream model