Balbina hydroelectric plant, in Presidente Figueiredo Secom Collection Amazonas has 48 dams registered in the National Dam Safety Information System (SNISB), according to the 2026 Dam Safety Report, released by the National Water and Basic Sanitation Agency (ANA). The state appears among those with the fewest registered structures in the country and has the second lowest number of dams in the North Region. The data is part of ANA's annual report, which brings together information sent by federal and state inspection bodies and presents an overview of the implementation of the National Dam Safety Policy (PNSB). The 2026 edition considers information referring to the year 2025. In the North Region, Amazonas is ahead only of Amapá, which has 28 registered dams. Tocantins leads the regional ranking, with 1,195 registered structures, followed by Acre (568), Pará (529), Rondônia (162) and Roraima (123). The registration of Amazonian dams is the responsibility of the Amazonas Environmental Protection Institute (Ipaam). ? Join the g1 AM channel on WhatsApp Across the country, the number of registered dams reached 29,761, an increase of 6% compared to the previous survey. According to ANA, 1,676 new structures were included in the system. Dam failure simulation: residents participate in a simulation in Balbina Despite the progress, the agency warns that there are still dams without sufficient information to verify whether they comply with the National Dam Safety Policy. This process is considered fundamental to define the level of inspection and security measures required for each project. According to the report, the national registry is the main tool for inspection bodies to know the characteristics of existing dams in the country, allowing them to identify structures that require greater attention and direct prevention and monitoring actions. Most dams are used to store water The survey shows that 28,799 dams, equivalent to 97% of registered structures in Brazil, are intended for water accumulation. Irrigation dams represent the majority of the national registry, with 10,316 records. Next come those intended for animal watering (6,137), flow regulation (3,796) and human supply (2,376). Mining dams total 913 records, while another 49 are used to contain industrial waste. In total, the registered reservoirs have the capacity to store around 695 billion cubic meters. Of this total, approximately 686 billion cubic meters correspond to water accumulation dams. Lack of information is still a challenge The report highlights that one of the main challenges for dam safety in Brazil continues to be improving the quality of information available about the structures. Currently, only 65% ??of registered dams have the entrepreneur identified. Furthermore, not all of them have complete information on the height and capacity of reservoirs, data considered essential for risk classification and for compliance with the National Dam Safety Policy. According to the legislation, dams that have at least one of the following characteristics are included in the policy: height equal to or greater than 15 meters, capacity greater than 3 million cubic meters, presence of hazardous waste, medium or high associated potential damage or high risk category. These structures are subject to more rigorous requirements for monitoring, maintenance and preparation of security and emergency plans. National panorama The 2026 Dam Safety Report shows that Brazil reached 29,761 dams registered with the SNISB, an increase of 6% compared to the previous survey. Despite the evolution of the registry, ANA emphasizes that it is still necessary to expand the identification and classification of structures to strengthen accident prevention actions and reduce risks related to dams throughout the country.