Most of the date used on this site is from the Census – but a recent interesting litter survey was published on all towns in Ireland with more than 6000 population.
The littering survey ranked the 50 towns in order of cleanest first, The full table is shown below (From the Irish Business Against Litter). Sligo came out worst (dirtiest) and Dundalk came out the best (cleanest)
1. Dundalk “Litter Free”
2. Cavan “Litter Free”
3. Fermoy “Litter Free”
4. Trim “Litter Free”
5. Killarney “Litter Free”
6. Monaghan “Litter Free”
7. Carlow “Litter Free”
8. Galway City “Litter Free”
9. Youghal “Litter Free”
10. Bray “Litter Free”
11. Letterkenny “Litter Free”
12. Ballina “Litter Free”
13. Naas “Litter Free”
14. Roscommon “Litter Free”
15. Thurles “Litter Free”
16. Drogheda “Litter Free”
17. Athy “Litter Free”
18. Waterford City “Litter Free”
19. Midleton “Litter Free”
20. Wexford “Litter Free”
21. Arklow “Litter Free”
22. Castlebar “Litter Free”
23. Swords “Moderately Littered”
24. Ballinasloe “Moderately Littered”
25. Maynooth “Moderately Littered”
26. Kilkenny “Moderately Littered”
27. Greystones “Moderately Littered”
28. Tralee “Moderately Littered”
29. Portlaoise “Moderately Littered”
30. Gorey “Moderately Littered”
31. Ennis “Moderately Littered”
32. Leixlip “Moderately Littered”
33. Longford “Moderately Littered”
34. Limerick City “Moderately Littered”
35. Cobh “Moderately Littered”
36. Clonmel “Moderately Littered”
37. Dungarvan “Littered”
38. Wicklow “Littered”
39. Tullamore “Littered”
40. Mullingar “Littered”
41. Newbridge “Littered”
42. Navan “Littered”
43. Athlone “Seriously Littered”
44. Dun Laoghaire “Seriously Littered”
45. Cork City “Seriously Littered”
46. Enniscorthy “Seriously Littered”
47. Mallow “Litter Blackspot”
48. Tallaght “Litter Blackspot”
49. Nenagh “Litter Blackspot”
50. Sligo “Litter Blackspot”