The recent wild weather and downpours this week won't make a difference to those water restrictions.
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Water Minister Melinda Pavey said the 30 millimetres that fell was nowhere near enough to call an end to water restrictions.
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Those stage one restrictions - which include only watering gardens with a hand-held hose fitted with a trigger nozzle before 10am or after 4pm - came into force on Saturday.
Other parts of the state have been under water restrictions for more than a year.
"The reality is our dams need at least 100 millimetres to start filling up," Mrs Pavey said.
"Over the past 36 hours around 30 millimetres has been recorded in parts of Sydney - a third of what we need to make an impact.
"In some areas, the state is the driest it has ever been and worse than the millennium drought."
There will be a three-month grace period for those breaking the water restrictions before fines of $220 for individuals and $550 for businesses are imposed.