New Zealanders pay almost a dollar more for a single litre generic-label milk carton than Australian consumers, prompting the NSW Farmers Dairy Committee to ask why we can't pay more here.

"$1.50-a-litre milk prices would provide farmers with a reasonable return, it would create margin for processors, and it would be affordable for consumers," NSW Farmers Dairy Committee chair Colin Thompson said.

"If we take the New Zealand comparison example, 1 litre of private label milk retails at around $2.20, while here it is $1.30."

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NSW Farmers is asking consumers to have their say through a poll on the association's Facebook, Instagram and Twitter platforms. Early poll results indicate that more than 90 per cent of respondents support paying more for milk.

Mr Thompson said the heavily discounted price of private label milk in Australia has been damaging for the dairy sector.

"We're glad to see that $1-a-litre milk prices have ended but the price needs to be lifted further to reflect the quality and cost of producing fresh Australian milk.

"We have been calling on the major retailers Woolworths, Coles and Aldi to lift the price of their generic milk brands to $1.50, and to increase the price of other dairy products like cheese.

"The price rise must go back to farmers to provide immediate relief for dairy farmers, who are facing rising water, feed and energy costs.

"We are at a crisis point in NSW, but other states are doing it tough as well. This is a national issue that needs a national response."