Assessment of Data Availability and Quality in SINISA Based on a Sanitation Deficit Index in 

Minas Gerais, Brazil

João Pinheiro Foundation (FJP), Brazil

 Abstract: This study analyses the availability and quality of information in the National Basic Sanitation Information System (SINISA), using the state of Minas Gerais as a case study. The analysis is based on the Basic Sanitation Deficit Index (IDESB), developed by the João Pinheiro Foundation (FJP), using data from 2017 to 2021. The IDESB serves as a management tool for monitoring deficiencies in sanitation services, focusing on water supply, sewage collection and treatment, solid waste disposal, and stormwater management. The study reveals that 58.3% of municipalities in Minas Gerais present either insufficient or inconsistent data, compromising public policy planning. The results indicate significant information gaps particularly in smaller municipalities, and highlight the need for improved data collection, verification, and capacity building at the local level. Recommendations include restructuring the State Sanitation Information System (SEIS) with updated technologies, respondent training, and cross-validation mechanisms. Reliable data is critical to achieve the universalization goals outlined in the National Basic Sanitation Plan.