1. Introduction
Non-Revenue Water (NRW) is the difference between the volume of water supplied in the water distribution system and the volume of water billed to the water consumer [
1]. NRW can be categorised as the water losses caused by real loss and apparent loss, and the unbilled authorised consumption (
Table A1). A high rate of NRW indicates poor water management because it can cause excessive water loss and financial loss, which leads to increased expenditure to supply more water to meet a country’s water demand [
2]. Real loss is defined as the physical water loss from the water supply network, including all types of leaks, bursts, and overflows in service reservoirs, mains, and service connection pipes up to the point of customer metering [
3]. Apparent loss consists of unauthorized consumption and meter inaccuracy, for example illegal water connection, meter under registration and data handling errors, whereas unbilled authorised consumption includes the water used by the water utilities for operation purpose (e.g., flushing and cleaning), water used for fire-fighting, and water provided free to certain consumer groups [
1].
In many developing countries, high rates of Non-Revenue Water (NRW) remain a serious problem, although the importance of reducing NRW is well-known to the water sector [
4]. The World Bank estimated the average NRW rate in developing countries as 35 per cent, accounting for losses of approximately 26 billion m
3 of water [
4]. A report by the Asian Development Bank (ADB) stated that the annual volume of NRW in Asian cities is about 29 billion m
3 or on average 30 per cent of the total water produced by Asian water service providers. This causes nearly nine billion US dollars (USD) of revenue loss per year [
5]. Typical problems that occur in developing countries and often exacerbate the progress of NRW reduction include: a lack of funding, inadequate involvement of the public, lack of motivation of water service providers, political interference, issues of corruption, and a lack of private sector interest [
6].
In the past decades, various technical solutions have been highlighted as being effective in reducing NRW rates, such as pipe replacement [
3], meter replacement [
7], and pressure management [
8]. However, water problems cannot be solved effectively without sufficient public participation [
9]. Indeed, one of the reasons why NRW rates cannot be effectively reduced in some cities is due to a lack of public participation in NRW reduction activities that are often induced by poor public awareness of NRW issues [
6]. For instance, leakage control is an effective loss reduction strategy that depends on how quickly the water service providers become aware of the incidents of pipe leakage and burst pipes [
10]; and the success of the apparent loss reduction strategy also depends on how quickly the water service providers can disconnect the illegal pipe connection or replace a faulty meter [
2]. A public which is aware of the importance of NRW reduction and water conservation can play a role, as informed and active citizens who report burst pipes, pipe leakage, meter malfunctions at home, suspected illegal water use, etc. to the responsible authorities. These actions can help to effectively shorten the time needed by the water service providers to be aware of a NRW-related incident and subsequently repair the leak, disconnect an illegally-connected pipe, or replace a faulty meter. Importantly, raising public awareness on the importance of NRW reduction will ease the resistance of the public to pay a reasonable water bill which is fair to the public and water service providers [
6].
There are examples in the literature that show that public participation can contribute to better outcomes for NWR reduction programmes. In Phnom Penh, Cambodia, for instance, the public is encouraged to report illegal pipe connections, with rewards offered by the authority to those that do report and penalties given to those who have been found to install illegal pipe connections [
11]. Through this policy, the water service providers successfully reduced their NRW rate from 72 per cent in 1993 to only 6.19 per cent in 2008 [
12]. Likewise, in East Concession Zone of Metro Manila, Philippines, the NRW rate had been reduced by 45 per cent to only 16.9 per cent in 2009. There, the water service providers introduced a community water management programme by engaging several local people as informal street leaders, who assist the water service providers to curb NRW issues, by providing information on aspects such as burst pipes, leaking pipes and water shortages [
13]. Moreover, Singapore’s NRW rate is among the lowest in the world [
14], at approximately 4.7 per cent in 2012 [
15]. An NRW reduction guidebook published by Singapore’s water service provider highlighted that good water consumer and water utility relationships is an essential element to managing NRW effectively [
16]. In brief, public participation in NRW management can make the NRW reduction strategies more effective. However, improving public participation in NRW management is all too commonly left unaddressed in many developing countries, including Malaysia.
With an average annual rainfall of more than 3000 mm and more than 556 m
3 of annual renewable surface water [
17], Malaysia is a country rich in water resources. However, the country still faces seasonal water supply problems, and high NRW rates are one of the major causes of such problems [
18]. The government and water service providers have been dealing with the NRW issue for decades, but have so far shown little success. Referring to the Eighth [
19], Ninth [
20] and Tenth Malaysia Plans [
21], the Malaysian government spent around 600 million USD from 1996 to 2010, on reducing the country’s NRW rate. In 2013, the country’s NRW rate was still high at 36.6 per cent, with NRW rates ranging from 18 per cent to 62 per cent among all the country’s states, with five out of 13 states recording NRW rates higher than 50 per cent [
22]. Such high rates of NRW jeopardize Malaysia’s water security in the long-term, potentially leading to negative effects on the country’s social (unfair water service bill), environmental (loss of water resources), and economic well-being (revenue losses of water sector) [
23].
A study pointed out that Malaysia’s NRW problem is not just a technical issue, but also an issue which highlights poor management and governance [
24]. Previous investments in the country’s NRW reduction programmes listed in the previous Malaysian Plan [
19,
20,
21], were mostly focused on reducing NRW rates through engineering solutions, such as a pipeline replacement programme, a meter replacement programme, the establishment of District Metered Areas, etc. In addition, one of the key barriers facing Malaysia’s water sector in achieving better water management is public participation [
25], which is always given too little consideration when planning water policy. There have been few success stories from Malaysia’s water utilities agencies regarding the engagement of the public as a solution to the NRW issue. At present, little research has been done to study public participation in NRW management in the Malaysian context; and public awareness of the NRW issue and around NRW reduction remains particularly underexplored. In the context of chronic water losses, inefficient resource utilization, and ineffective utility management, this study has been undertaken to understand the public perception of NRW management with a view to generate policy inputs for supporting urban water policy. To achieve this objective, this study primarily addresses three questions: (i) Is the public aware of the NRW issue? (ii) How does the public perceive NRW reduction? (iii) Do members of the public take action to solve NRW-related water issues? Straightforward policy information and ways to improve public participation in NRW reduction are delineated.
4. Discussion
In Malaysia, raising water tariffs is a politically sensitive issue. In Penang, domestic water tariff costs only 0.35 Malaysian Ringgit which is equal to 0.08 US cents for the first 40,000 L; in Perlis, the domestic water tariff costs 0.59 Malaysian which is equal to 0.14 US cent for the first 40,000 L of water [
32]. With such low water tariffs, the public has no incentive to conserve water and the water service providers have no money to carry out more water-related and NRW reduction projects [
25]. Importantly, at present the structure of water tariffs in Malaysia’s water sector is not based on full cost recovery, i.e., the revenue collected by the water service industry can barely cover total operating expenditures [
24]. In order to achieve long-term water sustainability, the current water tariff structure of Malaysia’s water sector needs to be revised. Moreover, water conservation has not been practiced by Malaysians, as domestic water consumption in most states is higher than 220 L per capita per day [
22]. This figure is still relatively high in comparison with the other cities in Southeast Asia: for example, Singaporeans only consume 160 L per capita per day. Under these circumstances, understanding public perception and awareness towards water conservation, including NRW reduction is very important, as this can help to better engage the public in water governance and management [
33]—including engaging more people to conserve water and pay a higher water tariff.
Studies report that Malaysian people are well aware of river pollution [
34,
35] and drinking water contamination [
36], and this is because the negative impacts of such issues to human’s health are well-recognised. For the NRW issue, the negative impacts of NRW issues on the public are mostly delayed or indirect, leading to poor public awareness of this issue. For example, the leakage of underground pipe can cause revenue loss for a water service provider, but it is less likely to cause immediate water supply interruption to a city that has generally sufficient water resources.
The comparison between the public perception of NRW issues in a city with high NRW rates (Kangar) and a city with low NRW rates (George Town), demonstrates that the respondents in both cities do not have good awareness of the NRW situation in the country. The majority of the respondents in both cities did not think that leaking pipes are one of Malaysia’s major water issues, and the majority of the respondents did not rate water loss issue as either serious or very serious in Malaysia. It is possible that most respondents have never experienced a serious water supply issue caused by high NRW, or they did not know high NRW rates could cause water supply interruptions. The number of cases of water supply interruptions reported to Penang and Perlis’s water service providers in 2012 and 2013 were among the lowest in the country [
22]. Besides, a lack of awareness of the public concerning NRW issues could be partially attributed to the fact that they do not understand the term NRW. NRW is a technical word widely used in the water-related sectors, but its technical nature alienates the public. The public knowledge and awareness of NRW and water conservation issues needs to be improved to ensure better NRW management.
In regards to the public perception of NRW reduction, a higher percentage of respondents in Kangar still strongly believe in developing more water resources (e.g., building dams or water treatment plants) to solve their water supply issues. However, building dams or water treatment plants is expensive, and may have negative impacts on the environment, wildlife and local communities [
25]. In contrast, more respondents in George Town preferred to solve the water supply issue by managing water demand, which emphasises reducing water wastage and water loss. The public need to be educated about the appropriate solutions for solving their water supply problems to view “water demand management” as the most appropriate strategy—rather than choosing the out-dated approach of “developing more water resources”—as water demand management strategies have been found to be workable in Malaysia [
37].
Furthermore, respondents in both cities have high expectations of the state’s water utility and government’s agencies to play a bigger role in solving water loss issues. Even though the majority of the respondents in both cities thought that they should be responsible in solving water loss, they did not believe that the public holds a high responsibility in water loss management. This could be because the respondents believed that the public has limited capacity to solve water loss issues and that the government or water service providers should be the ones responsible. For example, the public may think that they can only make a call to the water service provider if a leaking pipe is spotted on the roadside, and that the public does not have the capacity to repair the leaking pipe, as only the water service provider is able to do the repair work.
The degree to which a person is concerned about NRW-related issues could also determine the action that will be taken by a person, if the issue is noticed by the person. Overall, the results from this study show that respondents in both cities were concerned about pipe leakage, meter inaccuracy, and illegal water use. However, the majority of the respondents in both cities never reported to the water service provider when they encountered a leaking pipe. It was found that respondents in George Town were generally less likely to report observed leakages to the water service provider. This could be attributed to the process for making such a report. Some respondents gave feedback in the questionnaire on the reasons why they did not report, these included: “I do not know the phone number of water service provider”, “I do not know who I should call”, “I was busy”, and the “process of making such report is troublesome”.
The result of this study also shows that most respondents in both cities did not save the water service provider phone numbers into their mobile phones. It is suggested that Penang’s water service provider should develop an information and communication technology (ICT) to better engage the public in NRW reduction activities. At this moment, Perlis’s water supply service is still in the process of privatization, advanced NRW reduction activities that use high-end technology cannot be implemented due to a lack of funds. As such, the state’s water service provider can create a NRW reduction strategy involving the public as the major actor in leak management. Community-led NRW reduction strategies that encourage local people’s participation can actually be carried out with lower budget.
5. Policy Implication
The outcomes of this study have practical implications for policymakers and urban water utility managers to improve NRW management in Malaysia and beyond. A number of policy implications were identified with rationale and practical reference for supporting urban water policy formulation and improving public participation in NRW management.
• Improve public perception of water tariff and ensure full cost recovery for better water demand and NRW management
The public is more likely to pay for water services if they are aware of the health and economic benefits derived from improved water supplies [
38]. Additionally, a transparent and fair tariff-setting framework will increase the willingness of water consumers to accept future tariff hikes [
24]. Water consumers have to be informed what they are paying for, i.e., understanding that there are a lot of costs incurred to provide better water services, including reducing NRW rate, maintaining the water infrastructure, and other operational costs. More initiatives need to promote the public’s interest in relation to water tariffs, as well as to improve public awareness on water demand and NRW management.
• Integrate NRW-related knowledge and information into the content of water and environmental education activities
In Malaysia, educating the public on water conservation is normally done by water service providers, government agencies, or NGOs via awareness raising campaigns, community-outreach or educational programmes. However, the importance of reducing NRW rates is rarely mentioned in the content of such activities. The negative impacts of high NRW rates, the role of the public and the benefit of reducing NRW rates should be mentioned in the awareness raising activities.
• Develop information and communication technology (ICT) strategy to engage public in NRW reduction activities
ICT is useful for improving stakeholder participation in water management by providing a platform to link both water service providers and water consumers [
39,
40]. For example, Singapore’s water service provider has introduced a mobile app through which the public can make water service complaints. Malaysia’s water utilities should develop ICT-based tools to make the process of reporting NRW-related issues more community-friendly, efficient, effective, and easy for the public to better engage in reporting NRW-related water service complaints. More choices should be provided to the public to make water service complaints; for example, making reports via short message services, emails, web-chat, and mobile apps.
• Establish social networks for water management to engage public in NRW reduction activities
Establishing social networks for water management that consist of local communities could be an alternative strategy for the water service providers to engage local people in NRW management. For example, if Perlis’s water service provider does not have funding to develop an ICT strategy to support an NRW reduction activity, a community-based leak detection team that consists of local people, the village committee, and NGOs could be formed and coordinated by the water service provider to communicate problems on the ground and broadcast news related to water supply—including identifying illegal pipe connections and reporting pipe leakages.
6. Conclusions
The objective of this study has been to understand the public’s perception of NRW management in order to provide policy inputs and to determine ways to improve public participation in NRW reduction. Findings highlight that there is meagre public participation in NRW management in Malaysia. The main findings of this study are: (i) the majority of the respondents do not have good understanding of what NRW is and they are still lacking in awareness of the seriousness of NRW issue in the country; (ii) respondents expect water service provider and government’s agencies to play a bigger role in reducing NRW rates; (iii) there are significant numbers of respondents from Perlis State who prefer to solve their water supply problems by developing more water resources instead of managing water demand; and (iv) the majority of the respondents do not report to water service providers when they find leaking or bursting pipes on the road, and most of them do not save the water service provider’s phone number into their mobile phones. Based on these findings, public involvement in NRW management in Malaysia still has plenty of room for improvement. In this regard, the aforementioned policy implications have useful opportunities for supporting urban water strategy and policy formulation and implementation.
Reducing NRW requires contributions from all relevant water stakeholders. Ranging from organising an awareness raising campaign to planning a NRW reduction policy, all the issues and challenges need to be well managed to ensure that a water service provider will be able to reduce its NRW rates effectively. The findings in this study indicate that effectively engaging the public in NRW reduction in Malaysia remains at an early stage, as most of the respondents still do not have a good awareness and knowledge of NRW; and the water service provider’s NRW reduction strategies have not successfully engaged the public in NRW reduction activities. In Malaysia, there have not been success stories to draw on of effective engagement of the public in water management, and water governance in Malaysia is still largely based on a top-down approach. Water management, including NRW management in the country, needs a paradigm shift away from this traditional top-down approach towards a bottom-up approach, which emphasizes the involvements of multiple-stakeholders. This will go a long way towards enhancing Malaysia’s water security and moving the country forward towards achieving sustainable water resource management. Finally, considering different approaches are applied to engage people in urban and rural areas in NRW management, more research on the awareness and perceptions of rural populations on NRW issues are needed. Finally, as Malaysia is a multicultural society, more studies are needed to understand how different ethnic groups perceive NRW reduction, and what underpins their perceptions.