Sydney dam levels drop below 50 per cent for first time in 12 years – Sydney Sydney’s dam storage levels have dipped below 50 per cent for the first time in 12 years with no end in sight to drought conditions. Greater Sydney’s dam capacity this week fell to 49.7 per cent, according to Water NSW, which is 0.4 per cent down from the previous week. That means dam levels are below 50 per cent for the first time since 2007. They initially dropped under the halfway mark in 2004. (LINK). HIWI042019-08-22T19:14:37+02:00