ADB Approves $300 Million for Sri Lanka Water Networks, Jaffna Sanitation and Sector Reforms

New financing connects construction with water sector reform

The Asian Development Bank has announced $300 million in financing for Sri Lanka, pairing new water and sanitation infrastructure with changes to how the sector is managed and funded. The package includes $200 million for a project expected to improve drinking water services for more than 1.3 million people in the Western and Southern provinces and sewerage and sanitation for almost 250,000 people in Jaffna.

A further $100 million will support the second subprogram of the Water Supply and Sanitation Reform Program. Its measures cover water safety, tariffs, management of water resources and the financial performance of the National Water Supply and Drainage Board (NWSDB).

ADB set out the approvals in its 9 November announcement, issued from Colombo in 2026. The package brings together two practical needs: building and improving physical systems, and strengthening the institutions responsible for keeping those systems working.

Shannon Cowlin, ADB's country director for Sri Lanka, linked the financing to the health and economic needs of communities:

Access to safe, reliable, and sustainable water and sanitation services is essential for public health and economic growth,

The infrastructure project accounts for two thirds of the $300 million package, while the reform program accounts for one third. Their purposes are connected: treatment plants, reservoirs and pipes need reliable operation, maintenance and funding long after construction ends.

Where the $200 million infrastructure project will go

The Climate-Resilient Sustainable Water Supply and Sanitation Project will build water treatment plants, transmission and distribution networks, and storage reservoirs in Colombo and Lunugamwehera. In Jaffna, the investment will develop wastewater treatment facilities, sewerage networks and pumping stations.

Water treatment plants make water suitable for supply. Transmission pipes carry it between major facilities, while distribution networks deliver it through the communities they serve. Reservoirs provide storage within that system. Investing in these connected parts addresses more than the construction of an individual plant.

A cabinet approval reported on 5 May 2026 provides a more detailed picture of the planned works. It identified five subprojects:

• Improvements to the Ambatale water treatment system.
• Improvements to the Jubilee water supply system.
• Management of non-revenue water in Kolonnawa.
• An integrated water scheme in Lunugamwehera with a stated capacity of 20,000 cubic metres.
• A wastewater project in Jaffna.

The cabinet approved implementation with ADB financing and the prompt start of procurement for the five subprojects. Procurement is the process of selecting contractors and purchasing the works, equipment and services needed to carry out a project.

How the project cost fits the financing package

The May cabinet account put the estimated total cost of the infrastructure project at $250 million, including an expected $200 million from ADB's ordinary capital resources. ADB's November announcement confirms the $200 million financing component for that project.

On those figures, ADB financing represents 80% of the estimated infrastructure cost. The remaining $50 million is the difference between the estimated total and the bank's contribution.

The $300 million announcement combines that $200 million infrastructure financing with the separate $100 million reform program. The two components therefore have different spending purposes, even though both support water and sanitation services.

Several implementation details remain unspecified in the announcements: the source of the infrastructure project's remaining $50 million, construction and completion dates, household connection schedules, and the amounts or timing of tariff changes. Those details will determine when residents receive improved services and how the financial reforms affect customers.

What will change for Jaffna and water supply areas?

Jaffna's planned investment focuses on wastewater collection and treatment. Sewerage networks carry wastewater away from homes and other premises, pumping stations move it through the system where needed, and treatment facilities process it before disposal or reuse where permitted.

Almost 250,000 people in Jaffna are expected to benefit from better sewerage and sanitation services, according to ADB. That work addresses a different part of the water cycle from the drinking water improvements planned for more than 1.3 million people in the Western and Southern provinces.

Residents in the water supply areas are expected to gain more reliable access to safe water. In Jaffna, the stated benefit is improved management of wastewater and sanitation. Keeping those service targets separate helps explain what the project is designed to deliver in each location.

ADB also places water safety and sanitation management within the reform program. Physical construction and service rules will therefore operate together: the infrastructure handles water and wastewater, while institutional reforms address how those services are managed.

Reducing losses and preparing for extreme weather

Kolonnawa's planned work targets non-revenue water. This means water that enters a supply system but does not generate payment for the utility, including water lost through leaks, inaccurate measurement or unauthorized use.

Reducing those losses can make better use of water already being treated and pumped. It can also help the utility collect revenue for services it provides. ADB identifies reduced water losses as a goal of the broader infrastructure project, alongside greater use of renewable energy and stronger NWSDB capacity.

Climate resilience is another shared priority of the construction and reform components. In practical terms, resilience means preparing water services to cope with natural hazards and extreme weather and to recover when disruption occurs.

The infrastructure project calls for resilient treatment plants, networks and storage. The reform program adds a sector resilience roadmap and measures for adaptation to natural hazards. Together, these address both the physical strength of facilities and the planning needed to maintain essential services.

Renewable energy use is included among the project's objectives. Water treatment and pumping require energy, so energy choices form part of how the network is operated. The announcement sets the direction toward renewable sources without identifying particular installations.

What the $100 million reform program supports

The Water Supply and Sanitation Reform Program is ADB's first policy based lending program in Sri Lanka's water sector. Its second subprogram builds on a first phase that received $100 million and was completed in 2024.

Policy based lending supports government reforms rather than a defined collection of construction works. The new $100 million facility is also expected to provide budget support as Sri Lanka continues its economic recovery and meets development financing needs.

ADB groups the reforms into two main areas. The first covers resilience, inclusion and environmental sustainability, including management of water resources, drinking water safety, sanitation management and adaptation to natural hazards.

The second covers governance and operational and financial performance. Its measures include amendments to the National Water Resources Policy, tariff reforms, adoption of a sector resilience roadmap, stronger corporate performance management and implementation of the NWSDB financial sustainability roadmap.

The program also addresses coordination among institutions, water conservation, gaps in access between social groups, and access to climate financing. These measures extend the work beyond individual construction sites to the rules and organizations serving the wider sector.

Tariffs, utility finances and private investment

Water tariff reform concerns the rules used to set charges for water services. Alongside those changes, the program seeks to strengthen the NWSDB's ability to manage its finances and maintain services over time.

The financial sustainability roadmap addresses the utility's longer term financial position. Stronger corporate performance management concerns how the organization sets goals, tracks results and holds management responsible for delivery. These measures connect the institution's finances with its daily work of supplying water and managing infrastructure.

For customers, the central issues are service quality, access and the charges they pay. The program includes inclusion among its objectives, placing access across different social groups alongside financial reform rather than treating revenue as the only concern.

ADB also wants to mobilize private financing for future water investments. Private sector participation appears in both the infrastructure project and the reform program, as a means of supporting investment and service delivery.

The announcements describe a continuing central role for public institutions. NWSDB capacity building, financial planning and performance management remain explicit parts of the package, while the reform program seeks additional private participation.

How the loans are structured and who will implement reforms

Sri Lanka signed agreements on 6 November 2026 for the $100 million water reform facility as part of a wider $200 million signing that also included $100 million for a separate vocational skills program.

The water reform financing comprises a $50 million concessional loan and a $50 million regular loan, both through ADB's ordinary capital resources. A concessional loan generally offers more favorable terms than regular lending, such as lower financing costs or more time to repay.

Dr. Harshana Suriyapperuma, secretary to the Ministry of Finance, Planning and Economic Development, signed for Sri Lanka at the General Treasury in Colombo. Cowlin signed for ADB.

The Ministry of Housing, Construction and Water Supply will serve as both the executing agency and an implementing agency for the reform program. The Prime Minister's Office and NWSDB will be the other implementing agencies.

The allocation of responsibilities matters because the program covers several kinds of action. Changes to national policy, utility management, drinking water safety and financial planning require coordination across government and the service provider.

From the first reforms to the new approvals

The financing follows several stages of policy preparation, cabinet action and loan agreements. The main dated developments are:

• 2024: The first subprogram of the Water Supply and Sanitation Reform Program, financed with $100 million, was completed.
• 5 May 2026: Cabinet approval was reported for the infrastructure project, with an estimated cost of $250 million and five planned subprojects.
• 6 November 2026: Sri Lanka and ADB signed agreements covering $100 million for water reform and $100 million for a separate skills program.
• 9 November 2026: ADB announced the $300 million water and sanitation package, comprising $200 million for infrastructure and $100 million for the second reform subprogram.

The sequence connects earlier institutional changes with a new round of investment. The first reform phase established policy, regulatory and institutional foundations; the second is intended to carry those reforms further while the infrastructure project expands and improves physical services.

ADB links the package to Sri Lanka's broader economic reform agenda, better public services and green economic growth. For the communities named in the project, its practical value will lie in safer drinking water, more reliable supply and better wastewater management, supported by institutions able to operate and maintain the systems.

Key Points

• ADB announced $300 million for Sri Lanka's water and sanitation sector on 9 November 2026.
• The $200 million infrastructure component targets improved water supply for more than 1.3 million people in the Western and Southern provinces.
• Almost 250,000 people in Jaffna are expected to benefit from better sewerage and sanitation.
• Planned works include Ambatale, Jubilee, Kolonnawa, Lunugamwehera and Jaffna subprojects.
• The $100 million reform component covers water safety, resource management, tariffs, climate resilience and NWSDB finances.
• The reform financing comprises a $50 million concessional loan and a $50 million regular loan.