Twenty six bottom sediment samples were collected from the Cananéia estuary in summer and winter of 2005. Multielemental analysis
was carried out by instrumental neutron activation analysis. Total mercury was determined by cold vapor atomic absorption.
As, Cr, Hg and Zn concentrations were compared to the Canadian oriented values (TEL and PEL). Sample points 4 and 9 presented
higher concentration for most elements and As and Cr exceeded the TEL values. Organic matter (>10%) associated with siltic
and clay sediments was observed. Climatic conditions, hydrodynamic and biogeochemical processes promote differences in seasonal
concentrations of elements at some points, which contribute to special distributions.