water Article Strategies, Processes, and Results for the Future Water Supply of the Växjö Municipality: Evaluation of an Evidence-Based Case Study of Long-Term Strategies within the Water and Wastewater Sector in Sweden Nasik Najar 1,* and Kenneth M Persson 2 1 Department of Construction Engineering and Lighting Science, School of Engineering, Jönköping University, 551 11 Jönköping, Sweden 2 Division of Water Resources Engineering, Lund University, Box 118, S-221 00 Lund, Sweden;
[email protected] * Correspondence:
[email protected]; Tel.: +46-736-556-581 Received: 10 July 2019; Accepted: 8 October 2019; Published: 16 October 2019 Abstract: In 2009, the Bergaåsen Water Supply Scheme was put into operation to ensure the future drinking water supply of two municipalities in southern Sweden. Bergaåsen replaced two vulnerable water treatment plants. It was implemented in an environment that was characterized by sensitive recipients and limited access to water. This article aims to analyze how strategies were developed to meet sustainability requirements, if this solution has ensured good quantity and high quality after ten years of operation, and the extent of the project’s economic impact on consumers. The project was analyzed as an evidence-based case study using semi-structured interviews, surveys, and document analyses. The study found that the chosen options succeeded in guaranteeing outstanding quality and secure delivery. Over 90% of water users were satisfied and had trust in it, and less than 3% were dissatisfied. The design time for withdrawal capacity has been extended from 30 to 50 years through planned measures. The study clarifies also that, due to some externalities, there has been virtually no economic impact on users.