SINGAPORE - Singapore's water operations at Johor River Waterworks have stopped temporarily due to pollution in the Johor River, said the national water agency on Sunday (Oct 29).

Treatment operations were stopped at 11am on Saturday, due to "high ammonia levels" in the water, said PUB in a Facebook post.

While the stoppage has disrupted the waterworks' supply to Singapore and some parts of Johor, water supply in Singapore will not be affected, said PUB.

Production at desalination plants and local waterworks has been stepped up to meet demand, the agency added.

"PUB is monitoring the raw water quality in the Johor River and will resume abstraction and treatment of raw water when the water quality is suitable," said PUB.

On Saturday, the water supply of about 1.8 million Johor residents were disrupted after three water treatment plants were shut down due to high ammonia levels in raw water from the Johor River.

Earlier on Sunday, Johor ordered a poultry farm and a factory along the Johor River in Kota Tinggi to close after they were identified as responsible for the pollution, reported The Star.