This study has investigated environmental water sampling using on-site SPE techniques that ensures a faster turnaround for getting samples onto a sorbent matrix and better stability at sampling areas, where processing resources are limited. However, we do acknowledge that the environmental sampling exercise was limited to very few samples in the River Avon (UK) and Olifants River (SA). Grab sampling was used in this study and is a popular choice for monitoring freshwater systems due to rapidness and ease of collecting a sample. However, care must be taken when sampling to ensure representative location and frequency. Future studies should aim to repeat and expand upon the number of samples taken in this study, and investigate most appropriate times to sample; taking into account seasons and weather patterns, as well as determining the number of samples needed for statistical significance.