The blue mussels (Mytilus edulis) along the Swedish west coast have contained DSP-toxins above the limit for consumption during part of the year every year since the monitoring programme started in 1988. Some areas that previously have been believed to be toxin free have experienced toxic events the last few years. PSP-toxins occur only rarely and usually below the limit for ban of consumption. However, e.g. in 2002, concentrations were higher than the limit for a short period in one fjord.