Water resource management, supply and sanitation zimbabwe report 7 7. Pdf on jan 18, 20, hosein kamani and others published management of nonrevenue water in distribution network and conveyor lines. Solutions of nonrevenue water management through analysis. Unbilled authorized consumption usually a minor component of water balance, apparent losses, and real losses. Jica project brief note the project for improvement of nonrevenue water reduction capacity for siwa in solomon islands. It seriously affects the financial viability of water utilities through lost revenues and increased operational costs.
Nonrevenue water nonrevenue water is an important topic for drinking water companies, as it influences the financial sustainability, serviceability and the management of precious water resources to a large extend. As things now stand, there appear to be overlapping responsibilities and lack. Water audits and water loss control for public water. The edams distribution non revenue water management system in conjunction with the edams monitoring and control system provides an integrated environment for the planning, implementation and monitoring of conservation and infrastructure programs, addressing both commercial and. Sam kayaga bsc eng, msc, phd, ceng, reng, mciwem, muipe. Sbd299in case 32m3householdmonth jpy4,100 pipe length. The key to developing a strategy for management of nonrevenue water nrw is to gain a better understanding of the reasons for nrw, and the factors which influence its components.
Aug 31, 2016 non revenue water nrw management allows utilities to expand and improve service, enhance financial performance, make cities more attractive, increase climate resilience and reduce energy consumption. High levels of nrw reflect huge volumes of water being lost through leaks, not being invoiced to customers, or both. Changes in non revenue water are an indication of network health and data management efficacy issues that can have a significant impact on a utilitys bottom line. An important feature is the financial analysis module. Developing a nonrevenue water reduction strategy part 1. Several members of the echologics team serve on industry committees of awwa a. Nrw can be broken down into several categories, technical losses leakage, not billed water, illegal connections, the poor meter performance of bulk and revenue meters and inaccurate reading and recording of water meters. It lets you evaluate your water leakage costs versus work expenses, enabling you to make smart and valid decisions for the future.
Performancebased contracts for nonrevenue water management. Jesse morris 540 technologies technical sales consultant. Managing nonrevenue water non revenue water nrw sourcebook for trainers wave programme on behalf of. Most developed countries have a solid infrastructure and established operational practices for managing and controlling non revenue water nrw. Then techniques and procedures can be developed and tailored to the specific charac. Nonrevenue water management, the challenge facing water and sewage companies april 2017 santiago prado in an effort to increase earnings and achieve greater costefficiency, water and sewage companies must confront the critical task of reducing levels of nonrevenue water, which can be caused by several factors, including leaks, meter. Aging, leaking pipe contributes greatly to the issue of nonrevenue water nrw, or water that is pumped and then lost or unaccounted for. Nrw refers to the difference between the amount of water that enters the distribution system and the amount of water billed to consumers. May 15, 2014 aging, leaking pipe contributes greatly to the issue of non revenue water nrw, or water that is pumped and then lost or unaccounted for.
Using performancebased contracts to reduce nonrevenue water. A smarter future for water distribution and nonrevenue water management by joel hagan the landscape is changing for water consumers and suppliers and the delivery systems that connect them, with data and analytics forging the path ahead. Nonrevenue water nrw or urban water loss is a major global challenge as 2550 percent of all distributed water globally is lost or never invoiced due to illegal connections, inaccurate billing systems, inaccurate metering, physical leakages, deteriorating infrastructure, wrong water pressure management etc. Non revenue water nrw is water that has been produced and is lost before it reaches the customer. Efficient management of nrw offers significant financial benefits to utilities while bringing economic and environmental benefits to societies around the world. The standard terminology includes the terms authorized consumption, real loss, apparent loss and non. The issues and challenges of reducing nonrevenue water 2. Introduction to nonrevenue water concepts and definitions. Jun 16, 2016 non revenue water nrw is water that is placed into a water distribution system and not billed because of leaks or commercial failures. But all too often, after investing in expensive repairs and new equipment, the end result is missed expectations. Water management nonrevenue water reduction management drought climates and the case of nicosia, cyprus 57th ecce general meeting sc environment and sustainability in lisbon, portugal 31 may 1 june, 20 george demetriou cyprus council of. Pdf management of nonrevenue water in distribution network. The non revenue water solution by steve cavanaugh, pe. The international energy agency has estimated that 34% of all water worldwide becomes nonrevenue water.
Mar 14, 2018 a smarter future for water distribution and non revenue water management by joel hagan the landscape is changing for water consumers and suppliers and the delivery systems that connect them, with data and analytics forging the path ahead. The financial viability and operational performance of water utilities is heavily affected by excessive levels of non revenue water nrw. Water balance, using the iwa methothology for the year 2011 in cubic meters distribution system input volume authorised consumption billed authorised consumption revenue water unbilled authorised consumption non revenue water water losses apparent losses real losses water balance year 2011 9% rl2. Changes in nonrevenue water are an indication of network health and data management efficacy issues that can have a significant impact on a utilitys bottom line. Despite australian utilities performance, non revenue water still requires consistent monitoring. We know youre focused on reducing nonrevenue water nrw and closing the gap between the volume of water you supply and the water you bill your customers each month. The views expressed in this publication are those of the authors and do not necessarily reflect the views and. In the united states, loss is estimated at 10 to 30%, with some distributors claiming losses of nearly 50% daily. Nonrevenue water nrw services echologics have the expertise, tools and experience required to assist water utilities in the implementation of a water audit following current industry best practices developed by the awwa and iwa.
The international energy agency has estimated that 34% of all water worldwide becomes non revenue water. The result today is that most danish water supplies are below 10% non revenue water. The issues and challenges of reducing non revenue water. It is known that, the real losses from nonrevenue water consist of burst pipes, leaking joints, fittings, service pipes, illegal connection, inaccurate meters, billing errors. It is known that, the real losses from non revenue water consist of burst pipes, leaking joints, fittings, service pipes, illegal connection, inaccurate meters, billing errors. In order to meet the future demand for water, a strong focus on efficient water management, operations and management, and especially a reduction of nonrevenue water nrw is called for. Most developed countries have a solid infrastructure and established operational practices for managing and controlling nonrevenue water nrw. This is not always the case in developing countries. Nonrevenue water nrw management allows utilities to expand and improve service, enhance financial performance, make cities more attractive, increase climate resilience and reduce energy consumption. In fact, in north america, nrw can amount to between 20 percent and 30 percent.
Pdf reduction of nonrevenue water as a water demand. Download pdf 6 mb nonrevenue water nrw management can deliver significant financial and economic benefits, and to a large extent, nrw programs can be selffinancingrapid revenue gains from commercial loss reduction, for example, can supply the opex and capex funds needed to reduce the nrw. Water management nonrevenue water reduction management drought climates and the case of nicosia, cyprus 57th ecce general meeting sc environment and sustainability in lisbon, portugal 31 may 1 june, 20 george demetriou cyprus council of civil engineers cyprus association of civil engineers. This is a must read for urban water practitioners, policy. A key issue of water management water21, june 2008, p. Nonrevenue water nrw management can deliver significant financial and economic benefits, and to a large extent, nrw programs can be selffinancingrapid revenue gains from commercial loss reduction, for example, can supply the opex and capex. Authorized consumption is water that is used by known customers of the water system. The result today is that most danish water supplies are below 10% nonrevenue water.
The nonrevenue water solution allows you to manage your water distribution network proactively and intelligently. In the market for good practices on performancebased. Nonrevenue water nrw is water that is placed into a water distribution system and not billed because of leaks or commercial failures. Nonrevenue water spaghetti network repairs and leaks. A glossary of the key concepts featured in the guide is provided on page 2. Non revenue water, nrw, water balance, performance indicators introduction twenty years ago, leakage management was more based on a process of guesstimation than on precise science. Regional workshop on capacity development, water operators partnerships and financing for nonrevenue water management 79 july 2014, dushanbe, republic of tajikistan introduction to nonrevenue water concepts and definitions. Pdf a study of non revenue water management in penang as. Non revenue water is the difference between system input volume and billed authorized consumption, and it consists of the following. The bestpractice conference on non revenue water management, organised by the association of arab coun tries water utilities acwua in january 2010 in rabat, gave. The caucasus and central asia is the only region that reported no progress or deterioration on the drinking water target of the mdg 7. Using some key messages, the managers nonrevenue water handbook leads the utility manager through the stages of addressing nrwfirst, understanding and quantifying nrw, and then developing a strategy to address it. Losing as much as 2550 % of the distributed water in the piping networks is a challenge for those who are left without water or receive polluted water due to.
Water audits and water loss control for public water systems. A study of non revenue water management in penang as an example of good water governance. Download pdf 6 mb nonrevenue water nrw management can deliver significant financial and economic benefits, and to a large extent, nrw programs can be selffinancingrapid revenue gains from commercial loss reduction, for example, can supply the opex and capex funds needed to. Nonrevenue water, nrw, water balance, performance indicators introduction twenty years ago, leakage management was more based on a process of guesstimation than on precise science. Nonrevenue water includes physical losses, commercial losses and free authorized nonrevenue water for which payment is not collected. This has changed dramatically, kickstarted by the regulatory pressure on uk water companies to cut leakage. The water supplies hereby got a strong incentive to reduce water losses and improve the quality of the distribution system. The water utility of the capital of copenhagen hofor has currently a non revenue water of around 6. Review and cite nonrevenue water protocol, troubleshooting and other methodology information contact experts in nonrevenue water to get answers. Non revenue water non revenue water is an important topic for drinking water companies, as it influences the financial sustainability, serviceability and the management of precious water resources to a large extend. Nonrevenue water reduction an international update. Nonrevenue water management, the challenge facing water and.
The caucasus and central asia is the only region that reported no progress or deterioration on the drinking water target of the mdg 7 mdg 20 progress chart. A call to action for nonrevenue water water finance. The audit, undertaken in nine 9 wsps, with the support of the netherlands development organization the snv and kenya market trusts, shows the huge gap that exists between targets set by wasreb and the reality on the ground. An important conclusion is that the design of nonrevenue water reduction programs should study the main drivers of nonrevenue water to provide utility managers with a better understanding of what can be achieved in terms of nonrevenue water reduction and whether the benefits of these reductions exceed their costs. An important conclusion is that the design of non revenue water reduction programs should study the main drivers of non revenue water to provide utility managers with a better understanding of what can be achieved in terms of non revenue water reduction and whether the benefits of these reductions exceed their costs. Nonrevenue water leak detection programs echologics. Partnerships and financing for non revenue water management 79 july 2014, dushanbe, republic of tajikistan introduction to non revenue water concepts and definitions.
In a water constrained environment, nrw management often offers superior costeffectiveness compared to supply augmentation. Globally, on average 34% of pumped water ends up as nrw, according to the international energy agency. Mar 24, 2020 non revenue water nrw or urban water loss is a major global challenge as 2550 percent of all distributed water globally is lost or never invoiced due to illegal connections, inaccurate billing systems, inaccurate metering, physical leakages, deteriorating infrastructure, wrong water pressure management etc. As such, chasing non revenue water is driven by return on investment. Non revenue water includes physical losses, commercial losses and free authorized non revenue water for which payment is not collected. The need to prevent nrw losses and protect precious water resources has become increasingly important. The bestpractice conference on nonrevenue water management, organised by the association of arab coun tries water utilities acwua in january 2010 in rabat, gave. According to the world bank, in developing countries, roughly 45 million cubic meters of. Naturally, the default solutions have been to replace pipes and meters. Guidelines for nonrevenue water reduction detailed.
The issues and challenges of reducing nonrevenue water. While nonrevenue water nrw management and drinking water loss reduction are global issues, the central asian region faces significant challenges. Despite australian utilities performance, nonrevenue water still requires consistent monitoring. The issues and challenges of reducing nonrevenue water water asia. Losses can be real losses through leaks, sometimes also referred to as physical losses or apparent losses for example through theft or metering inaccuracies.
The nonrevenue water solution by steve cavanaugh, pe. Nonrevenue water is the difference between system input volume and billed authorized consumption, and it consists of the following. Water loss management to reduce nonrevenue water presented by. Non revenue water spaghetti network repairs and leaks. The largest nrw management program to date was authorized in 2015 by the state of california senate bill 555, which requires a comprehensive threephase, sevenyear program for water utilities to compile water audits with thirdparty validation, define systemspecific loss reduction targets and take actions to reduce losses to target levels. A case study of the water supply in accra, ghana by peter adu yeboah a research project report submitted in partial fulfilment of the requirements for the award of the degree of master of science of loughborough university september 2008 supervisor. A smarter future for water distribution and nonrevenue water. Review and cite non revenue water protocol, troubleshooting and other methodology information contact experts in non revenue water to get answers.
Partnerships and financing for nonrevenue water management. The financial viability and operational performance of water utilities is heavily affected by excessive levels of nonrevenue water nrw. The water utility of the capital of copenhagen hofor has currently a nonrevenue water of around 6. Apr 17, 2017 the largest nrw management program to date was authorized in 2015 by the state of california senate bill 555, which requires a comprehensive threephase, sevenyear program for water utilities to compile water audits with thirdparty validation, define systemspecific loss reduction targets and take actions to reduce losses to target levels. Nonrevenue water audit of wsps water services for all. Nonrevenue water reduction detailed measures nonrevenue water prevention measures step1 nonrevenue prevention measures step1 basic consideration for nonrevenue prevention measures was discussed using text of guidelinesin stage1. Non revenue water nrw can be described as water which is supplied produced and purchased but not paid for. Water management nonrevenue water reduction management.