Dublin City Council's Assistant City Manager Seamus Lyons has said new by-laws will allow the local authority to identify those not using any type of waste collection service.

Speaking on RTÉ's News At One, Mr Lyons said the council will take action against those not using any provider.

Mr Lyons said the council currently does not know who is not paying for waste collection.

He said there were hotspots in some areas where the problem was worse, although he acknowledged that some dumping could have been done by people from outside the area.

Mr Lyons said the current system of on-the-spot-fines was not working.

"If one of our litter wardens actually finds someone dumping along the street and they seek their name and address for instance to serve a fine - quite often, the person does not co-operate and that can be difficult,” he explained.

"If we can identify a person who is involved in dumping or getting rid of bags of this type, then we can take court action and the fines can be up to €2,000," he said.

Meanwhile, Dublin City Council is continuing to investigate claims that illegal dumping is causing rat infestation.

The issue was raised by Independent Cllr Anna Quigley during a meeting of the Central Area Committee, which was discussing how to deal with large scale illegal dumping of household waste on the streets in the north city centre.

The council's environmental health officers are visiting multi-rental units particularly in the North Circular Road and asking landlords to show waste storage areas.

The local authority will also be carrying out a poster campaign in a number of litter blackspots.