As part of the SIOSED (Scripps Institution of Oceanography SEDiment research group) we have made an investigation of the geochemistry of interstitial waters of sediments recovered in this program. SIOSED studies were carried out from March 2005 to November 2007 at various times of the year. Our studies of interstitial waters were initiated in May 2005 and carried out through February 2007. At first we studied interstitial waters recovered from piston cores of variable lengths (1.1 m to 1.5 m), but later we emphasized also the studies of 20 - 25 cm long tube cores, especially in areas where new sediment banks were constructed from materials of a dredged canal. In this report we present the data obtained under the auspices of program, intended as a back ground for already published information as well as for future papers on the geochemistry of Venice Lagoon sediments obtained under SIOSED.