Sbwriel ar heolydd bach Cymru: Astudiaeth achos Penisa’r Waun (Litter on rural Welsh roads: A case study from Penisa’r Waun)

701 pieces of litter were collected per kilometre from a small rural road in Gwynedd. The minimum annual ‘hidden’ cost of this litter – uncollected by the local authority – was £11.81 per kilometre. The comparable annual cost of such litter on small rural roads throughout Wales is £230,000. A substantial proportion of these costs could be eliminated through introducing a deposit system for cans and bottles. 13 specific companies were responsible for producing more than one quarter of all the litter collected. The Welsh Government could arrange an annual mitigation payment of £58,000 from them in order to defray the hidden costs of litter associated with their activities.