Around 1.8 million residents in Johor Baru have been affected by a major water supply disruption, after operations at three water treatment plants were stopped due to high ammonia levels found in their raw water from the Johor River, local media reported on Saturday. The ammonia pollution was caused by a chicken droppings processing factory close to the river, according to local authorities. The water supply in Singapore will not be affected by high ammonia levels in the Johor River, Singapore’s national water agency PUB said in a Facebook post on Sunday.