Voluntary Agreements Support Ecosystem Service Delivery
PES programs operate through voluntary agreements in which landowners are compensated for adopting practices that maintain or enhance ecological functions. These agreements are supported by clearly defined eligibility criteria, transparent funding mechanisms, and robust monitoring systems that track service delivery over time. Common PES arrangements include conservation easements, reforestation contracts, and watershed protection schemes, all grounded in legally binding or performance-based frameworks.
Public and Market-Based Financing for PES Programs
Governments, development agencies, and water utilities are often the primary funders of PES, using public budgets, environmental levies, or donor support to finance compensation packages. Market-based approaches are also emerging, such as tradable carbon or biodiversity credits, which enable private-sector actors to invest in ecosystem outcomes.
Best Practices and Technical Verification in PES
Technical guidance is integral to PES success. Programs often require landowners to follow science-based best management practices in forestry, agriculture, or water resource management. Independent audits and third-party verification increase transparency and public trust.
Scaling PES Through Integrated Policy and Investment
New York City’s PES Partnership Secures Urban Water Through Watershed Conservation
The New York City water supply system is one of the world’s largest unfiltered surface water networks, delivering over 1.1 billion gallons of safe drinking water daily to nine million people. The system depends on the Croton Watershed (375 square miles, east of the Hudson River) and the Catskill/Delaware Watersheds (1,597 square miles, west of the Hudson), which include 19 reservoirs and three controlled lakes. This natural infrastructure is safeguarded through ongoing management and PES agreements.
WAC, a locally governed not-for-profit, implements PES programs in partnership with the New York City DEP. WAC works directly with farm and forest landowners in both watersheds to carry out Whole Farm Plans and Forest Management Plans. These plans incorporate BMPs such as nutrient management, manure storage, cover cropping, and forest erosion control. Conservation easements help restrict development and ensure long-term sustainable land use.
DEP’s $228 million commitment supports the design of a new WAC headquarters, funds more than 80 staff positions, and covers program costs including technical support, conservation easements, forestry activities, and small economic grants. Local technical partners—such as Cornell Cooperative Extensions and Soil and Water Conservation Districts—provide expertise to participating landowners. Voluntary participation remains critical for reducing water pollution and supporting the long-term productivity of farms and forests in the region.
Conclusion: Advancing Ecosystem Protection Through PES Policy Tools
PES policy tools are essential for protecting natural resources and supporting local economies. Strategic regulatory frameworks, reliable funding, and technical assistance promote effective land stewardship and deliver lasting benefits for ecosystems and communities. Expanding the use of PES tools across watersheds worldwide is vital to achieving long-term climate and water security.
