Tourists landing at Dublin Airport are being met by littered approach roads, according to a nationwide survey by Irish Business Against Litter.
The study, which shows continuing improvement in many towns and cities, said the area around the country's main airport is a blackspot with dumping and casual litter on approach roads.
Over half of overseas visitors to this country come through Dublin Airport.
The study has named Cavan as Ireland’s cleanest town with 43% of Irish towns and cities cleaner than the European average.
The survey puts Kilkenny and Longford just after Cavan at the top of the table.
Up to 76% of cities and towns in the country are deemed to be clean, but Dublin's north inner city has again been labelled as a litter blackspot.