Eighty per cent of the water supply in Johor’s Kulai district was restored by noon on Friday (Apr 5), following water cuts due to ammonia pollution in Sungai Sayong, said Bukit Batu assemblyman Jimmy Puah Wee Tse.

Mr Puah, however, told CNA that it will take more time for water to reach users in areas of higher elevation.

A reservoir at a bio-composite centre next to an oil palm refinery in Sedenak burst on Wednesday at around 7am. This caused ammonia-contaminated water to flow into Sungai Sayong, one of the creeks that supplies raw water to the Johor River.