Killarney is Ireland's most litter-free town.
The Irish Businesses Against Litter League has released its annual findings this morning.
According to the ranking the Kerry town, along with 15 others, are cleaner than European Norms.
Farranree in Cork City and Dublin City are both classed as littered.
The North Circular Road, Portland Row and Seville Place were also said to be much cleaner than in the past but parts of Gardiner Street were said to be in a “shocking state” and Spencer Dock suffered from “huge amounts of litter”.
The An Taisce report slammed the Manor Street /Brunswick Street/Church Street area as “a litter blackspot, as was a site on Capel Street.”
Mr Horgan added: “Unfortunately, for Ireland to project a clean image, we need our capital city to be free of litter, and this year we are seeing a deterioration in cleanliness levels in Dublin city centre, and indeed several roads around Dublin Airport, where most of our visitors enter the country.”
The survey found sweet papers, cigarette butts, fast food wrappers and chewing gum were the most common forms of litter.
And Ibal warned councils to do more to clean up after dogs, with fouling of public areas a cause of concern and special bins at risk of becoming unhygienic eyesores.