Tanks are drying up at scores of Hunter Valley properties, causing increased demand for water cartage services.
Rain has been scarce across the region over the past three months, with parts of the Upper Hunter now declared marginal in terms of drought.
George Lambret from Elderslie has been carting water for more than 20 years.
He says demand has forced him to run trucks 24 hours a day.
"There's been a lot of people who have been out of water for a couple of days, and we're trying to get to them," he said.
"And the last three months actually it's been quite dry right around the whole area.
"With the wineries and the other places that we can do late in the evening, we can sort of run a night shift, but it is mainly the domestic, that we try to get people who haven't got water with water."
Mr Lambret says he is struggling to keep up with demand.
"We got a little bit of rain not so long ago which quietened things down a little bit, and sort of let us catch up, but basically the last two months is the driest I've seen for a fairly long time.
"We just haven't had any rain at all, and then we got that little bit not so long ago, so we are flat chat and there is a couple of days waiting list for us."
© ABC 2012
19:04 EDT Longreach in central-west Queensland has broken November heatwave records with an 11-day stretch of 40 degrees Celsius-plus temperatures, the weather bureau says.