The Deposit Return Scheme for plastic bottles is leading to lower litter across the country.
Today's IBAL survey also shows Naas is the cleanest town in the country, ahead of Monaghan and Blanchardstown in Dublin.
Arklow is ranked 16th in the list of 40 towns and cities nationwide and is deemed clean to European norms.
However, Dublin city centre has seen a further deterioration and has been declared "Littered".
Wicklow Fashion Brand To Feature Prominently During Ireland's Six Nations Clash With Wales
TD Calls For The Government To Get A Move On With South-Wicklow Greenway
Wicklow Councillors Demand €15m In Emergency Funding For Storm-Damaged Roads
Wicklow Hurlers Dominate Fermanagh To Ramp Up Promotion Hopes
Survey Shows Wicklow Families Want The Right To Deliver A Funeral Eulogy