Analyses are given for up to 12 metals and 4 pesticides with PCBs, of aquatic environment from 15 study sites along or near the Athabasca River from Fort McMurray north to the confluence of the Peace and Slave Rivers. There were 560 fish (8 species), 15 water, 14 sediment and a few phyto-plankton and invertebrate samples. Methods of analysis (by AAS and GLC) are outlined, and standard deviations and detection limits given. In a few cases, where suspected, elevated concentrations of metals and pesticides are discussed. In fish, most As, Cr, Ni, V, Pb and Cd concentrations were close to detection limits (0.01, 0.1, 0.1, 0.04, 0.05, 0.01, respectively). Cu, Hg, Se and Zn were not unusually high (means of 0.94, 0.15, 0.37, and 16.9 µg/g respectively); metal concentrations did not correlate well with body weight. Pesticides were mostly below detection limits, although yellow walleye and longnose sucker showed a few µg/g of methoxychlor, chlordane and dieldrin. In water, As, Cr and Cd were mostly