Single-use plastics are now banned in South Australia.

South Australia's ban on disposable plastic straws, cutlery and other single-use items has come into force.

But the nation-leading ban could still expand, with the SA Government looking for other items to add to the prohibited list.

State parliament passed the new laws last year, but the COVID-19 pandemic saw the implementation of the measures delayed until this week.

Environment Minister David Speirs says the sale, supply and distribution of a range of single-use items is now officially banned. 

Mr Speirs says polystyrene cups, bowls and plates, as well as other items, will be added to the list early next year. 

Businesses that do not comply with the laws can be fined. 

“By being a first-mover nationally we've already seen businesses who manufacture reusable and compostable alternatives start to set up in South Australia,” Mr Speirs said.

“Our ban will have significant economic benefits and create local jobs, as well as being good for the environment.”

The Victorian Government says it will also ban single-use plastics, with plans for new legislation to be in place by 2023.

The Australian Packaging Covenant Organisation, which includes federal and state governments as well as key industry players, has pledged to phase out “problematic and unnecessary single-use plastics packaging” nationwide by 2025.

China has brought in new laws on single-use plastics as part of a five-year roadmap to reduce waste.

A Europe-wide ban on single-use plastics, including straws, cutlery and cotton buds came into effect this year, while EU member states are pushing for a 90 per cent collection in plastic bottles by 2029.