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The increasing demand for clean water at the Faculty of Engineering, Sultan Agung Islamic University (UNISSULA) Semarang requires an alternative and sustainable water source. One effective solution is the implementation of a rainwater harvesting (RWH) system to meet non-domestic water needs such as toilet flushing, plant irrigation, and campus cleaning. This study aims to analyze the potential utilization of rainwater, design an appropriate RWH system, and evaluate its cost efficiency compared to the use of PDAM (regional water supply company) water. This research employed a quantitative approach by collecting primary data, including roof catchment area measurements and existing rainwater drainage conditions, as well as secondary data such as average rainfall, the number of campus users, and PDAM water tariffs. The analysis consisted of calculating the potential harvested rainwater volume, designing the RWH system, estimating installation costs, and comparing operational costs between RWH and PDAM water usage. The results indicate that the potential harvested rainwater volume from the building’s roof is approximately 7,054.5 liters/day, while the average non-domestic water demand is 3,170 liters/day, allowing water needs to be met during the rainy season. The implementation of the RWH system can also reduce water costs by up to 43,6%, equivalent to IDR 87.615.616 over a 20-year period. Therefore, the application of RWH is an effective and sustainable solution for water management within the campus while supporting operational cost efficiency.

This study aims to find out and test the influence of PDAM service quality, PDAM tariff and PDAM payment place on PDAM payment receipts. This research was conducted with a quantitative approach. The type of data in the form is primary data with questionnaires. The study population is PDAM customers in Brebes Regency.  The determination of the number of samples in this study with the Slovin formula obtained 98 responses. The respondents' answer data was tested with validity and reliability tests. It is then tested with a classical assumption test. The data analysis technique was carried out by multiple regression test The results of the study showed that the quality of PDAM services partially affected the receipt of PDAM payments obtained a sig value = 0.000 < 0.05. Partially, the PDAM tariff affects the receipt of PDAM payments, obtaining a sig value = 0.000 < 0.05. Partially, the place where PDAM payments affect the receipt of PDAM payments obtained a sig value = 0.001 < 0.05. Simultaneously, the quality of PDAM services, PDAM tariffs and PDAM payment places affect PDAM payment receipts.

Penelitian ini bertujuan untuk menganalisis kesediaan membayar (Willingness to Pay/WTP) masyarakat terhadap layanan air bersih dari PDAM di Kelurahan Garuntang, Kota Bandar Lampung. Metode yang digunakan meliputi pengumpulan data primer melalui kuesioner untuk menghitung kebutuhan air domestik serta faktor-faktor yang mempengaruhi WTP. Untuk menentukan sampel penelitian yaitu dengan menggunakan tabel Krejcie and Morgan, didapat jumlah sample dalam penelitian ini sesuai dengan tabel Krejcie and Morgan yaitu sebesar 63 sample. Dari 63 responden yang terlibat, hasil menunjukkan bahwa sebagian besar masyarakat bersedia membayar untuk layanan air bersih, dengan porsi dominan berada di rentang Rp.40.000 - Rp.60.000 (39,7%) dan Rp.61.000 - Rp.80.000 (39,7%). Temuan ini menegaskan pentingnya layanan air bersih dan memberikan wawasan bagi PDAM dalam penetapan tarif serta meningkatkan kepuasan pelanggan.  

PDAM tariffs and policies have a very important role in maintaining the availability of clean water and quality services for the community. Economically, the tariffs set by PDAM enable the provision of clean water in a sustainable manner with operational finance, infrastructure maintenance, and investment in developing the water distribution network. This research aims to reveal the impact of PDAM Tirtanadi's tariff adjustment policy on customer satisfaction. Adjusting air tariffs is an important step for PDAMs to finance infrastructure maintenance and operations, but this can also have an impact on customer satisfaction. The research method used is qualitative research with a descriptive approach. Qualitative research makes it possible to describe phenomena in depth, including the impact of PDAM Tirtanadi's tariff policy on customer satisfaction. In the descriptive method, the main focus is on a detailed and in-depth description of the observed phenomenon, without carrying out statistical analysis. The data used in this research comes from writings contained in books, scientific journals, previous research and through interviews with customers and related parties of PDAM Tirtanadi Medan Denai Branch during college internships. The results of this research indicate that the tariff adjustment policy creates hopes and concerns among customers, who hope that service quality will increase in line with tariff increases. In addition, this research also identifies factors that influence customer perceptions of tariff policies, including the quality of services provided, transparency in the use of funds, and responsiveness to customer complaints. The implications of this research are the importance of considering customer needs and expectations in designing adequate tariff policies, as well as the importance of transparency and accountability in providing public services such as the provision of drinking water.    

PDAM Tirtanadi is a company that provides clean water services to the general public, especially residents of HM Yamin and the surrounding area. PDAM Tirtanadi runs its operations with profits from customers who use its services. However, due to the large number of customer arrears, especially at the HM Yamin branch, the income received by PDAM Tirtanadi is less. The aim of this research is to identify variables that have the potential to cause customer water account arrears at the Tirtanadi Regional Drinking Water Company (PDAM) HM Yamin Branch. This study uses qualitative descriptions. In addition, during the research process, this research was carried out through observations, interviews and interviews, and document analysis. The research results show that the factors that cause water bill arrears include; 1) Customer economics; 2) Water is not running; 3) Water quality; 4) Buried meters; 5) Customer behavior to delay payment; and 6) Usage soars.

The method used by the author in this study is a qualitative method, this method is used to observe, understand and describe a study about the increase in tariffs for PDAM Tirta Mayang in Jambi city. The drinking water tariff is the cost of drinking water services that must be paid by the customer for each use of drinking water provided by the organizer. In the Regulation of the Minister of Home Affairs Number 23 of 2006 concerning Technical Guidelines and Procedures for Determining Drinking Water Tariffs at Regional Drinking Water Companies (PDAMs). The tariff for the level of basic drinking water needs must be affordable by customers whose purchasing power is equal to or less than the Provincial Minimum Wage. In the event that household expenditures to meet basic drinking water standards do not exceed 4% (four percent) of the income of the customer community, the tariff meets the affordability criteria. Tariffs must be applied fairly. the calculation and determination of drinking water tariffs is based on the principles of affordability and fairness. Quality of service, full cost recovery, efficiency of water use, transparency, accountability and protection of raw water.

The PDAM service tariff covers the cost of water treatment, infrastructure management, and services to customers. In PDAM Magelang City, there are several public service tariffs, namely the service of drinking water needs to customers, new connection services, payment of drinking water accounts, water quality inspection services, and water tank services. In this case the author will discuss the public service tariff in the new connection service of PDAM Magelang City.For the research method in this case, the author analyzes the data from the research conducted using descriptive analysis method in which data from interviews and document studies are processed and analyzed to provide an overview of the factors that determine the new connection service tariff at PDAM Magelang City.The new connection service tariff of each PDAM is different, the PDAM Magelang City tariff is based on the customer class which has IV customer groups with different tariffs. The tariff for class I is lower and the tariff will be higher for each class II and so on. Classes are adjusted to the type of house, land area, building area, type of building, type of floor, and type of roof used. The factors for determining the tariff for new connection services at PDAM Magelang City are seen in terms of financial and non-financial factors. In terms of financial factors, it consists of registration fees, drawing planning fees, connection permit fees, transportation costs and construction costs of service and persil pipes. While in terms of non-financial factors in the form of inclusion of new prospective customers on the criteria of the group that has been determined.