Products made by San Lu, a Fonterra affiliate in China, have been hit by the scandal.
But Fonterra said Monday that its Anchor, Anlene, Ratthi, Shape Up and Anmum branded milk powders sold in Sri Lanka were made only from New Zealand milk.
The firm said liquid milk and yoghurts sold under the brands Newdale, Ratthi, Anlene and Anchor were made only with Sri Lankan milk.
Fonterra also circulated a statement from the New Zealand Food Safety Authority which said New Zealand dairy products were tested for melamine and cyanuric acid, but were found to be free of contamination.
Dairy products imported to New Zealand were also being tested.
The New Zealand Food Safety Authority said "the economic incentive" to adulterate milk with melamine adulteration did not exist in New Zealand.Fonterra Lanka managing director Achyut Reddy was quoted in the statement as saying that the firm's products were put under rigorous quality controls.