 The works are currently operated by Scottish Water and at average demand, it can supply enough potable water to those it serves for up to 7 days.Its primary supply is via two aqueducts from Loch Katrine in the north, that are 56km (32 miles) in length, and can deliver up to a day.Milngavie itself is situated at almost 120m (400ft) above sea level – sufficient to provide adequate water pressure to the majority of Glasgow without the need for pumping.