Dams are full and nearly overflowing throughout the state after unprecedented rainfall in latest months however Sydney Water mentioned the water is probably not handled to change into consuming water.
"Our water filtration crops are working a lot more durable due to the quantity of particles and filth within the uncooked water," Managing Director Roch Cheroux mentioned.
"All of us have to work collectively to make sure now we have the provision we want over summer time, issues can change in a heartbeat."
To make the water in dams drinkable, the water is shipped to filtration crops round Sydney however resulting from all of the filth, silt and rubbish within the dam the filtration methods are unable to purify it.
Which means solely the highest layer of the water within the dams is ready for use for Sydney's consuming water provide.
Sydney Water Head of Provide and Product Ben Blayney mentioned the state's dam water filtration methods are underneath enormous stress to provide sufficient water to fulfill the demand.
"At one level throughout latest floods solely 5 to 10 per cent of the water in Warragamba Dam was appropriate to be drawn to deal with and clear regardless of the very fact the dam was at full," he mentioned.
"Issues are slowly bettering however we presently solely have a slender part of about 15 metres from the obtainable 60 metres in Warragamba Dam which is appropriate to deal with and clear."
Sydney Water mentioned the entire water within the dams will ultimately be used for consuming water nonetheless it's depending on the silt and sediment settling on the backside in a number of months' time.
It comes as residents in NSW and Victoria are bracing for an additional day of maximum climate with extra rainfall on the radar.
Not solely are the filtration methods fighting the particles from latest climate occasions however water utilization has additionally spiked this yr.
Sydney Water claims water utilization elevated from 64 litres a day between April and June this yr to 69 litres a day between July and September.
"Water utilization spikes over summer time, which places additional stress on the system," Sydney Water mentioned.
Because the warning has been put in place, Sydney Water has launched a brand new marketing campaign to encourage residents to avoid wasting water.
The marketing campaign, #saveitwithme, is supposed to focus on small modifications in behaviour leading to a big impact on water availability within the state.
"Our dams could also be full, however there's a lengthy course of to wash uncooked water following storms, floods and fires," Olympian Jess Fox, who has partnered with Sydney Water's marketing campaign, mentioned.
"All of it takes longer to deal with and switch into consuming water, so we're urging individuals to avoid wasting water the place doable as a result of the scenario can change right away.
"What we do at present could make the distinction tomorrow."
Unimaginable aerial pictures present extent of Condobolin flooding