Traditional sources such as government grants and loans remain important but are insufficient to meet the additional adaptation financing needs. Innovative instruments like green bonds, pooled funds, and insurance mechanisms offer ULBs new ways to mobilise private capital, diversify their funding sources, reduce dependence on public finance, and improve their financial sustainability.

Without quantifying climate risks, ULBs cannot develop adaptation strategies and accurately estimate their financial needs or design bankable adaptation projects. Embedding risk assessments into the planning process helps cities prioritise investments in resilience-building infrastructure, and align them with financing instruments.

Because limited creditworthiness and narrow revenue bases make it difficult for smaller ULBs to raise capital independently from debt-based instruments like green municipal bonds. Pooled financing and insurance-based mechanisms reduce individual fiscal stress and give such municipalities collective bargaining power to buy insurance for their assets from climate change induced risk.

The compendium draws from both Global North and Global South experiences but prioritises examples from the Global South, given their socio-economic similarities to India and higher potential for replication.

State governments can unlock access by enabling pooled financing, offering credit enhancements, and creating clear regulatory pathways. Development partners and donors can complement these efforts by providing concessional finance, technical assistance, and capacity building to help ULBs pilot and scale resilience-focused instruments.

This study targets policymakers, urban local bodies, financiers, and water sector stakeholders. It highlights India's growing water scarcity challenge and presents economic, job, and environmental benefits of scaling reuse of treated used water (TUW). It outlines sustainable financing tools and governance recommendations to mainstream circular water management and ensure the long-term viability of TUW reuse projects.

Financing TUW reuse requires diversified funding mechanisms to ensure the long-term sustainability of reuse projects. Innovative models include Water Reuse Certificates, Hybrid Annuity-based Public-Private Partnerships, municipal bonds, and end-user investment, which are important alternatives to public financing that diversify funding streams.

The integration of a circular economy approach begins with long-term, city-level TUW reuse plans that define clear treatment and reuse targets. These plans must identify suitable reuse avenues, specific quality standards, and appropriate conveyance mechanisms.

ULBs are central to implementing reuse plans, developing pricing mechanisms, leveraging commercial and industrial consumption, and coordinating the development of reuse infrastructure and policies at the city level.

Solar module recycling is critical for India’s energy transition as it addresses the dual challenge of managing growing solar waste and reducing dependence on imported raw materials. By recovering valuable resources like silicon, aluminium, and copper, recycling enhances resource efficiency, supports domestic manufacturing, and strengthens the resilience of India’s clean energy supply chain.

Solar waste generated from crystalline silicon modules consists of critical minerals such as copper, silicon and tin, whereas thin-film cadmium telluride modules contain cadmium and tellurium.

Solar module recycling involves three broad steps: disassembly of the module, delamination, and metal recovery. Disassembly is the step in which external components like metal frames and cables are removed from the laminated structure. Delamination involves separating the glass sheet, encapsulant, and the backsheet from the solar cells. Finally, metal recovery consists of various chemical processes to recover critical and precious metals from the cells.

The following factors play a significant role in the financial performance of solar module recycling: waste module procurement cost, collection cost, material composition of the modules, recovery rates of individual materials from solar waste, and purity levels of the recovered materials.

Module recycling costs in India can be reduced through economies of scale, improved waste collection systems, and the adoption of advanced, energy-efficient technologies. Policy support such as subsidies, tax incentives, and inclusion of solar waste under Extended Producer Responsibility (EPR) can further lower costs. Developing local markets for recovered materials and integrating recycling into manufacturing supply chains will also enhance revenue streams, improving overall cost efficiency and financial viability.