Canberra's dam levels have increased by almost 10 per cent since last Thursday due to the weekend's rain.
A deluge over the weekend saw the nation's capital record 60 millimetres of rain - more than the monthly average for August of 44 millimetres.
The rain boosted Canberra's dams, bringing storage capacity to 68.28 per cent, up from 59.6 per cent last Thursday, according to Icon Water.
It's a far cry from earlier in the year when storage levels had dropped to below 45 per cent, the lowest point in more than decade. Several months of above-average rain has seen levels rise by 24 per cent since February.
"We've had some good rainfall across the ACT over recent weeks and especially over this last weekend," Icon Water's general manager of customer engagement, Davina McCormick, said.
"It's a really encouraging result and we feel very good about those numbers."
Canberra has recorded higher than average rainfall for four of the past six months and rainfall has already exceeded the August average. Rainfall peaked in March at almost 100 millimetres - double the monthly average.
And early indications suggest Canberra could be in for more rain over spring.
"We know that the time ahead for spring - so these next three months - there is a greater than average predicted rainfall for that period so that's encouraging," Ms McCormick said.
"It's particularly favourable given the last few very dry years for Canberra's water levels."
The February low of 44.4 per cent capacity was 123 gigalitres and the last time the territory's water supply was at 123 gigalitres was August 2010. This was prior to an expansion of the Cotter Dam which increased the territory's water storage capacity from 207 gigalitres to 278 gigalitres.
When dam levels dropped below 50 per cent last November, Icon Water managing director Ray Hezkial told The Canberra Times the ACT could face water restrictions by the end of 2020 if dry conditions continued.
Restrictions look less likely now, however Ms McCormick said Canberrans should continue to be mindful of their water usage.
"It is looking positive for restrictions at this stage but they are never off the table and we continue to remind the community wherever they can to be conscious of their water usage and look to reduce it," she said.
"We know at this time of the year, in the cooler weather, that usage in the shower typically goes up and consumption gets to around 40 per cent in the bathroom, so we are just asking everyone to continue to focus on saving water in the bathroom and having shorter showers where they can."
Canberra's dam levels were last at 100 per cent capacity in November 2016.
Over the weekend, effluent had to be discharged into the Molonglo River after heavy rain infiltrated the sewerage system.
A small amount of partially treated effluent was discharged. Icon Water advised residents on the section of the Murrumbidgee River to the junction of the Molonglo River and above Burrinjuck Reservoir not to draw water for 48 hours, until Tuesday afternoon.
"There is no impact to the drinking water, but we would still advise those people in the downstream of the plant to not draw water either for drinking or for domestic or stock-watering purposes," Ms McCormick said.
More rain is forecast in Canberra this week.
CANBERRA DAM LEVELS:
- Corin Dam: 52.2 per cent
- Bendora Dam: 83.9 per cent
- Cotter Dam: 81.4 per cent
- Googong Dam: 67.8 per cent
- Combined volume: 68.28 per cent