The environmental impact of silver nanoparticles (AgNP) has become a topic of interest recently, this is due to the fact that AgNPs have been included in numerous consumer products including textiles, medical products, domestic appliances, food containers, cosmetics, paints and nano-functionalised plastics. The production, use and disposal of these AgNP containing products are potential routes for environmental exposure. These concerns have led to a number of studies investigating the release of particles from nano-functionalised products, the detection of the particles in the aquatic environment and the potential environmental toxicology of these AgNPs to aquatic organisms. The overall aim of this review is to examine methods for the capture and detection of AgNPs, potential toxicity and transmission routes in the aquatic environment. Display omitted •AgNPs are likely to be released into the environment during the lifecycle of consumer products.•The complex environmental fate of silver nanoparticles in aquatic systems is influenced by numerous factors.•The detection and characterisation of silver nanoparticles in environmental waters is difficult.•Variability in Ag and AgNP characteristics eluted to the environment leads to uncertainty in ecotoxicological assessments.•A standardised approach to toxicity testing on silver nanomaterials is needed to comprehensively assess their toxicity.