Raetihi in the central North Island now has a safe supply of water but local businesses have been left counting the cost of the contamination.
The last of the emergency water supply services, which included portable showers and toilets, were removed from the town on Wednesday.
Residents had not been able to drink or cook with the water since the beginning of the month after thousands of litres of diesel spilled from a tank at Turoa ski field, contaminating the town's usual water source.
Leonie Cadman, who runs the Barbed Wire Gallery Bach in Raetihi and has had no new accommodation bookings since the contamination, says the town's economy has suffered.
She says the town now needs to begin marketing itself again.
Leonie Cadman says she has lost several weeks income and visitors to the town are still staying away.
The Ruapehu District Council says it is in the process of setting up a scheme to help businesses claim for income lost during the contamination.