The Internet of Things (IoT), as the next-generation intelligent network, empowers devices to independently service requests or responses, making it a crucial and inevitable technology for modern-day water management. This chapter of the book provides a comprehensive review of existing state-of-the-art IoT solutions that harness the potential of IoT technologies in water management. The chapter delves into various applications, highlights encountered challenges, identifies research gaps, and proposes future research directions in this domain. Furthermore, the chapter explores the integration of blockchain technology as a solution to manage water services. By utilizing blockchain, water consumption by consumers can be accurately tracked, enabling them to view and pay bills while ensuring the security of their online transactions. The blockchain functions as a shared ledger among different parties, fostering transparency in water management practices. Its adoption facilitates trust-building among diverse entities, offers robust control over the blockchain network, and validates transactions effectively. With this holistic exploration of IoT and blockchain in smart water management, this book chapter aims to shed light on the transformative potential of these technologies in ensuring sustainable and efficient water resource management for the future.