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This report summarises the key results from the Rivers State of Environment (RSoE) monitoring programme for the period 1 July 2015 to 30 June 2016. The RSoE programme incorporates monthly monitoring of water quality, periphyton cover and sediment deposition at 53 river and stream sites across the Wellington Region. Macrophyte cover is also assessed monthly at selected RSoE sites. In addition, annual assessments of invertebrate community composition, periphyton biomass and habitat quality are conducted at all 53 RSoE sites in summer/autumn. Results from two river monitoring trials undertaken during 2015/16 are also presented.