The River Suir in Clonmel is moderately littered according to a new survey.
The IBAL report shows almost 40 per cent of the country’s rivers, beaches and harbours are littered.
Parts of Cork Harbour and Doolin Pier in County Clare have been labelled litter blackspots.
Kinsale Harbour in County Cork and Salthill in Galway scrubbed up well – they were declared clean to European norms.
Irish Business Against Litter spokesperson Conor Horgan says only four areas came out tops.