The fight against paramilitaries and others involved in cross-border illegal dumping will not be relaxed, the Irish government has pledged.
The Irish government's record on waste was condemned
A recent European Court of Justice ruling condemned the Republic for past failures to deal with illegal waste.
Fears had been expressed that illegal operators would try to dump more waste in Northern Ireland as a result.
Irish Environment Minister Dick Roche said he was aware of that possibility, but there would be "no relaxation".
There had been fears that resources to repair illegal sites in the border region might be diverted.
It is estimated that the illegal waste business in the Irish Republic is worth about £70m a year, which is about 10% of the industry's annual turnover.
Rogue contractors have been making millions by undercutting legitimate waste collectors.
The European Court of Justice ruled in April that the Irish government had failed to meet its obligation under the Waste Directive to ensure municipal landfills held required permits.
It ruled that Irish authorities had "tolerated unauthorised activities in numerous places in Ireland, often over long periods, failing to require that those activities be brought to an end".
"Such a failure to fulfil obligations is general and persistent in nature," it added.
The court concluded that "Ireland has failed to fulfil its obligation to ensure that only duly authorised undertakings dispose of or recover waste".