2006年-世界发展银行全球_The_Challenge_of_Reducing_Non-Revenue_Water_in_Developing_Countries--How_the_Private_Sector_Can_Help___A_Look_at_Performance-Based_Service_Contracting_52页_750kb

Summary of "The Challenge of Reducing Non-Revenue Water (NRW) in Developing Countries: How the Private Sector Can Help – A Look at Performance-Based Service Contracting"

Core Content

This document explores the significant challenge of reducing Non-Revenue Water (NRW) in developing countries and evaluates how performance-based service contracting can be an effective tool for private sector involvement in this effort. NRW refers to the difference between the water supplied to a distribution system and the water billed to consumers, encompassing physical losses (leakage), commercial losses (unbilled consumption), and unbilled authorized consumption (such as water used for firefighting or operational purposes).

NRW levels in developing countries are alarmingly high, with an estimated 35% of the water produced being lost, and the actual figure possibly reaching 40–50%. The global cost of NRW is estimated at $14.6 billion annually, with $5.8 billion in developing countries alone. These losses significantly impact the financial viability of water utilities and hinder the ability to expand services to the poor.

The report highlights that performance-based service contracting is a promising new approach to involve the private sector in NRW reduction. This model links payment to actual performance, offering the private sector incentives and flexibility to deliver results efficiently. It is especially relevant for public utilities that remain under government control but wish to benefit from the technical expertise and operational efficiency of the private sector.

Main Points

1. Why Reduce NRW?

• Reducing NRW improves the financial sustainability of water utilities.
• It allows for additional service expansion without new investments in production.
• It increases water availability and service reliability for consumers.
• It promotes fairness by tackling illegal connections and corruption.

2. What Is NRW?

• Physical losses are due to leakage and poor infrastructure maintenance.
• Commercial losses result from meter under-registration, data errors, and theft.
• Unbilled authorized consumption includes water used for firefighting, operations, and free distribution.

3. Magnitude of NRW Losses

• Global NRW loss is 32.7 billion cubic meters/year.
• Developing countries account for 26.7 billion cubic meters/year of NRW.
• Physical losses account for 16.1 billion m³/year, while commercial losses are 10.6 billion m³/year.
• The unit cost of reducing physical losses is estimated between $215–$500/m³, with $250/m³ being achievable for efficient projects.

4. Cost of NRW

• The cost of NRW is enormous, with $14.6 billion lost annually worldwide.
• In developing countries, $5.8 billion is lost, with $2.6 billion from commercial losses and $3.2 billion from physical losses.
• Commercial losses are often linked to fraud, corruption, and illegal activities.

5. Benefits of Reducing NRW

• 8 billion m³/year of already treated water could be redirected to serve 90 million more people.
• Water utilities could gain $2.9 billion/year in additional cash flow.
• Fairness is promoted by targeting illegal connections and corrupt practices.
• Economic growth and job creation are potential outcomes of NRW reduction efforts.

6. Why Utilities Struggle

• Lack of understanding of the problem leads to inadequate reduction efforts.
• Insufficient data and inadequate monitoring systems make it hard to assess the real extent of losses.
• Institutional weaknesses such as poor governance, limited autonomy, and lack of accountability hinder effective NRW management.
• Inadequate capacity in terms of skilled staff and training leads to inefficiencies in operations and maintenance.

7. Role of the Private Sector

• The private sector can provide technical expertise, operational efficiency, and financial incentives for NRW reduction.
• Performance-based service contracts offer a new alternative to traditional technical assistance contracts.
• These contracts transfer performance risk to the private sector, ensuring accountability and results-driven outcomes.

Key Information

• Performance-based service contracting is a novel model that links payment to results and is particularly useful in developing countries where public utilities are often inefficient.
• Case studies from MWA (Bangkok), SABESP (São Paulo), and City of Dublin demonstrate the potential of this model, though no contracts are considered "best practice" yet.
• Cost-benefit analysis is essential to ensure that NRW reduction programs are financially viable.
• Training and capacity building are crucial for long-term success in NRW reduction.
• Institutional reforms are necessary to support sustainable utility operations and reduce NRW effectively.

Conclusion

While performance-based service contracting is not a silver bullet, it has the potential to drive rapid improvements in water utilities through efficient resource use and private sector engagement. It can generate positive change and momentum for broader institutional reforms. However, it should be implemented carefully, with a clear understanding of the technical and financial implications, and in conjunction with broader governance reforms to ensure long-term success in reducing NRW in developing countries.