While NSW has had to deal with a sudden mice invasion, residents and businesses alike should consider ensuring their water supply hasn't been affected in any way. Water tanks and water pumps should be checked thoroughly to make sure they are in working order. Davey Pumps have published an article explaining how to go about checking your water pump and water supply so that they are in check. 

https://www.daveywater.com/au/why-davey/news-community/mouse-plague-and-safe-water-supply