Desempenho dos diferentes modelos institucionais de presta？？o dos servi？os públicos de abastecimento de água: uma avalia？？o comparativa no conjunto dos municípios brasileiros

this paper presents a comparative assessment of the different institutional public models for water supply provision in brazil. in an encompassing way, the study compares services of almost all brazilian municipalities, by a nonparametric analysis of variance. for this assessment, services were grouped according to the following classification: managed by the municipality; managed by a municipal autarchy; private companies; and regional models. the base year of the study was 2008, and secondary data from the national survey of basic sanitation were used. a set of performance indicators, related to operational and management aspects of services, was created. the results indicate significant differences between the evaluated models.