Authorities have warned regional water utilities that the severing of the rail link between Western Australia and eastern states posed an “escalating risk” of shortages of a critical chemical used in water treatment.

The New South Wales water directorate on Wednesday said a major supplier of aluminium sulphate – or alum – had warned eastern customers that disruptions of the east-west railway due to flooding had halted deliveries of a key ingredient, aluminium trihydrate.

Read more here in the Guardian