The Dar es Salaam Water and Sewerage Authority (DAWASA) is the monumental, state-owned public utility entirely responsible for the provision of clean, safe water and the management of sewerage services across the Dar es Salaam metropolitan area and parts of the Pwani region. Serving a population exceeding 6 million people, DAWASA is one of the largest and most critical public health utilities in East Africa. DAWASA operates incredibly massive engineering infrastructure to sustain the city. Their operations are anchored by the Lower and Upper Ruvu Water Treatment Plants, which process hundreds of millions of liters of water daily from the Ruvu River. This water is then pumped through vast networks of subterranean transmission mains to massive concrete reservoirs located strategically across the city’s elevated districts. In recent years, DAWASA has aggressively invested in modernized infrastructure to curb water loss (non-revenue water) and expand supply to previously unreached peripheral suburbs like Kigamboni and Mlandizi. They have also implemented highly efficient digital metering and mobile payment systems, drastically improving revenue collection and customer convenience while ensuring the sustainable management of Tanzania’s water resources.