Dublin city centre's litter problem has got worse, with dumping still an issue.
The latest Irish Business Against Litter survey also found Ballymun is more littered than last year.
However Blanchardstown is among the cleanest areas surveyed nationwide, while Tallaght, the north inner city and Dublin Airport environs all improved.
"Unfortunately, Dublin City Centre is again something of a blot on the landscape," says IBAL’s Conor Horgan.
He's warning it could impact on tourism; "As the peak tourist season beckons, we cannot call Ireland clean if our Capital is littered. While most areas are going in a positive direction, things are in reverse in Dublin. Littered streets simply do not square with the high prices our visitors face in the Capital, and threaten our long-term tourism prospects."
Among the blackspots encountered by An Taisce inspectors were a basement in Lamb Alley which featured "vast quantities of alcohol cans, broken windows, and all manner of food litter" and Balbutcher Lane in Ballymun where dumped items included street cones, car parts, and carpets.
Meanwhile Naas regained the top position it lost last year, ahead of Monaghan and new entrant Blanchardstown. Ballybane in Galway slipped to bottom of the rankings.
Image: Lawrence Smith / Alamy Stock Photo
