Instituto Brasileiro de Geografia e Estatística

1:250,000 Hydrogeology 

Hydrogeological maps at the 1:250,000 scale, made available according to the geographies of the Systematic Terrestrial Topographic Mapping of Brazil at the 1:1,000,000 scale.

Hydrogeologic Map of the State of Paraíba and Hydrogeologic Map of the State of Rio Grande do Norte

State Maps

Hydrogeology – Northeast, Hydrogeology – Southeast and Hydrogeology – South

Hydrogeological maps at various scales, covering the territories of the major regions—specifically the Northeast, Southeast, and South.