A major water supply disruption happened across the Causeway that lasted for two days, affecting many residents in Johor Bahru.

If you were in JB over the weekend, and wondering what had happened, here's a quick rundown:

What happened?

Four water treatment plants along the Johor river were temporarily shut down on Saturday (Oct. 28) due to high ammonia levels found in raw water from the river, according to The Straits Times.

The ammonia pollution was traced to a chicken droppings processing factory close to the river, which has been ordered to shut down, by the Malaysian authorities.

This was not the first time the company had caused a water disruption in the area.

 Who had been affected?

Some 1.8 million residents in three districts in southern Johor, namely Johor Baru, Kulai and Kota Tinggi, have been affected by the shutdown that lasted two days.

Is Singapore affected?

In a Facebook post on Sunday (Oct. 29), the national water agency PUB said that the stoppage of treatment operations at Johor River Waterworks (JRWW) disrupted its supply to Singapore and some parts of JB.

But the water supply in Singapore will not be affected by high ammonia levels in the Johor River, as PUB has stepped up production at desalination plants and local waterworks to meet demand.

In case you can't see it, here's the media statement in full:

Johor River Waterworks has to temporarily stop treatment operations at 11am on 28 Oct 2017 due to pollution in the Johor River with high ammonia levels.

The stoppage of treatment operations at JRWW disrupted its supply to Singapore and some parts of Johor.

Water supply in Singapore will not be affected as PUB had stepped up production at the desalination plants and local waterworks to meet demand.

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.

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What's next?

The situation was expected to be prolonged if ammonia levels do not drop.

But according to The Star, the Johor state government-linked company responsible for water supply services, SAJ Ranhill corporate communications head Jamaluddin Jamil, operations at the three water treatment plants would back to normal today.

Top photo from Vivian Balakrishnan’s FB