The New South Wales Health Minister has admitted the Government will struggle to meet its target of reducing child obesity rates by 5 per cent over the next decade.

This follows a report released last week by the Department of Health that concluded that obesity is becoming "normalised" in the state.

A snapshot found that:

22 per cent of the state's children are overweight or obese

5 per cent eat enough vegetables

64 per cent eat enough fruit

28 per cent get sufficient exercise

44 per cent spend more than two hours a day on a sedentary activity

Health Minister Jillian Skinner said parents were finding it more difficult to identify that their children have a problem.

"Generally everyone has put on weight so it changes what you see," she said.

Reducing rates of childhood obesity was one of 12 priorities for the Government identified by Premier Mike Baird.

"It is a tall order but if you don't have aspirational targets then you don't try hard enough," Ms Skinner said.

Director of Preventative Health Professor Chris Rissel said the Government was targeting a range of programs to encourage exercise and a better diet, such as the installation of iced water bubblers in schools.

"We want to make healthy normal. So that people do healthy things as normal behaviour and not default to the junk food option," he said.

"The messages are about increasing physical activity. It is about eating a modest amount and increasing fruit and vegetable consumption," he said.

The vice president of the NSW Australian Medical Association Dr Kean-Seng Lim is a GP from the western Sydney suburb of Mount Druitt, where he says in some age groups 50 per cent of young people are overweight.

"If you see everyone around you being the same weight then that becomes the new norm," he said.

At his surgery he trains locals about how to shop better, using an animation that describes what food they should buy at the supermarket.

They are warned that obese children usually become obese adults.

"That is associated with an increased risk of diabetes, an increased risk of heart disease and an increase in all causes of mortality," he said.

"We're in the top end of obesity rates in the world."