This study aims to address whether the temporary diversion of the Rio Carioca-redirected from discharging at Praia do Flamengo to being conducted through the Dry Weather Collector, following the same path as the sewage system to the Ipanema Outfall-aligns with its heritage preservation process. For this purpose, current sanitation legislation will be examined, with emphasis on the changes proposed by the New Sanitation Framework (Law No. 14,026/2020), which seeks to fulfill SDG 6 (Health and Sanitation) of the UN s 2030 Agenda through ambitious goals for water supply and sanitation coverage by 2033. The study will also address sewage collection systems, including the absolute separation system, which is considered ideal by environmental legislation. However, the shortage of sewage collection networks in Rio de Janeiro has led to interconnections between sewage and stormwater drainage networks, justifying the use of dry weather collectors. As the research is focused on the Rio Carioca, historical, geographical, and socioeconomic aspects of the river basin will be analyzed, as well as the changes in the surrounding landscape, given that this river was the main water supply source for the city until the 19th century. With its designation as a heritage site in 2019 by INEPAC, the study will assess the administrative preservation process and whether there was consultation with the community and the responsible agency prior to the diversion. The results aim to clarify any responsibility of the Concessionaire regarding interventions carried out on the Rio Carioca.