This dataset describes data collected from the Huon Estuary (Tasmania). Data was collected over a four day period during August/September 1998. Data was collected from 14 sites, ranging from 0 salinity at Judbury to a salinity of 35 at the seaward end of the estuary near Huon Island. Sites were selected to as possible sources of contaminants. Most sites were a subset from the Huon Estuary Study spatial surveys (refer to separate metadata record). Water samples were collected during the first three days. These samples were collected for salinity, dissolved oxygen, nutrients, trace metals, pesticides, pigments, spectral absorbance and phytoplankton. Sediment samples were collected during the last day. These samples were collected for organic tracers, pesticides, mercury and phytoplankton cysts. (Refer to the SED1 metadata record for more sediment information from the Huon Project.) This dataset forms part of the CSIRO Marine Research Huon Estuary study, conducted over the period 1996-1998.