Environment Minister James Griffin said the ban which comes into force on June 1, is the first step in a plan to rid the state of many single-use plastic items and packaging which make up 60 per cent of all litter in NSW.

"I think all of us can see the impact plastic pollution is having on our environment," Mr Griffin said on Monday.

The ban on lightweight single-use bags comes into place from June 1, and will be followed by a ban on more problematic plastics, such as cutlery and plates from November.

"Single-use plastic is used by many of us for just a few convenient minutes, but it remains in our environment for many years, eventually breaking into microplastics,," he said.

Stopping the supply of plastic would help prevent it becoming litter or going into landfill, he said.

"I encourage everyone to choose to go plastic-free as often as they can."

The NSW Government passed the Plastic Reduction and Circular Economy Act 2021 in November, and introduced the Plastics Action Plan last year.

The ban will prevent almost 2.7 billion items of plastic litter from entering the environment in NSW over the next 20 years.

From November the ban will include:

* single-use plastic straws, stirrers, cutlery, plates, bowls and cotton buds

* expanded polystyrene food ware and cups

* rinse-off personal care products containing plastic microbeads.

* So-called "compostable" and "bioplastic" alternatives to the above items which don't biodegrade unless they're treated in an industrial composting facility

The government is supporting more than 40,000 businesses across NSW to phase-out single-use plastics.

Australian Associated Press