Cruise ships Noordam and Sun Princess were in Napier Port and tanked up with fresh water on Sunday, but port bosses say that did not cause Monday's shortage.
Napier Port chief executive Garth Cowie said the two ships bought about 450 cubic metres from the town supply - not enough to have had any effect on the shortage.
He said the ship, which together carry about 3900 passengers and 1700 crew, injected more than $770,000 into the local economy.
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"Both ships took water – going by the numbers on the Napier City Council website, the total volume would have been around 1.6 per cent of the average daily water consumption or 0.9 per cent of the peak day average water consumption (which usually peaks at 50,000 cubic metres).