Dear colleagues, The following article has just been published on line in the *Science of the Total Environment*: *Organochlorine compound accumulation in delphinids from Rio de Janeiro State, southeastern Brazilian coast* José Lailson-Brito, Paulo R. Dorneles, Cláudio E. Azevedo-Silva, Tatiana L. Bisi, Lara G. Vidal, Leticiaá N. Legat, Alexandre F. Azevedo, João Paulo M. Torres, Olaf Malm. Science of the Total Environment, Volume 433, 1 September 2012, Pages 123–131 Contact: j <isabelaseabra.lima@gmail.com>oselailson@uerj.br or joselailson@gmail.com Abstract: The present study investigated organochlorine compound levels (PCBs, DDTs and HCB) in blubber samples of six delphinid species from Rio de Janeiro State, southeastern Brazilian coast. The species analyzed inhabit the continental shelf (one killer whale, one false killer whale, two bottlenose dolphins, three rough-toothed dolphins, and four long-beaked common dolphins) and open ocean (four Fraser's dolphins). PCBs represented the greatest proportion of the sum of all measured organochlorines (from 0.60 to 257.2 μg g− 1lw), followed by DDTs (from 0.15 to 125.6 μg g− 1 lw), and, at last, HCB (from < DL to 2.91 μg g− 1 lw). Higher concentrations were found in species that occupy the inner continental shelf (rough-toothed dolphin), as well as in cetaceans that are known to or are suspected to prey on other marine mammals (killer whale and false killer whale, respectively). The findings have shown that organochlorine levels in delphinids from southeastern Brazilian coast are comparable to those reported in cetaceans from highly industrialized regions of the Northern Hemisphere. Organochlorine accumulation patterns among delphinids from Rio de Janeiro State were related to habitat use. The article is available online at: http://www.sciencedirect.com/science/article/pii/S0048969712008558 Best regards, Jose Lailson