Greater Sydney Catchment

1

How much rain have we had?


Warragamba (24hrs to 9am)
mm for past week
2

How much water is in our dams?


Total Storage  
Weekly Change %
3

How much water have we used?


Daily Supply  
for past week

Catchment rainfall Water Storage Water Supply 1 0.0 2 0.0 3 0

Additional information

The March 2021 rain event generated a major spill event at Warragamba Dam.

The volume of water spilling from Warragamba dam during the March 2021 rain event peaked at 500 GL/day – equivalent to the amount of water that Sydney Harbour is estimated to hold

Other Sydney supply dams also received inflows, with Nepean, Cataract, Cordeaux and Avon dams all spilling


Loading

95.8
Monday 19 April
-0.3
2,472,636 ML
2,581,850 ML
9,734 ML
1,391 ML
-7,221 ML
Monday 19 April
96.6
Warragamba Dam
Warragamba
Monday 19 April
1,957,241
2,027,000
1,701,516
2,010,995
1,958,716
255,725
-53,754
-1,475
83.9
99.2
96.6
12.6
-2.7
-0.1
87.0
Woronora Dam
Woronora
Monday 19 April
62,449
71,790
46,056
51,762
63,058
16,393
10,687
-609
64.2
72.1
87.8
22.8
14.9
-0.8
99.3
Avon Dam
Upper Nepean
Monday 19 April
145,629
146,700
129,936
130,136
146,164
15,693
15,493
-535
88.6
88.7
99.6
10.7
10.6
-0.4
91.4
Cataract Dam
Upper Nepean
Monday 19 April
88,865
97,190
68,178
83,560
91,140
20,687
5,305
-2,275
70.1
86.0
93.8
21.3
5.5
-2.3
100.0
Cordeaux Dam
Upper Nepean
Monday 19 April
93,640
93,640
70,776
83,880
93,640
22,864
9,760
0
75.6
89.6
100.0
24.4
10.4
0.0
100.0
Nepean Dam
Upper Nepean
Monday 19 April
67,730
67,730
54,745
61,576
67,730
12,985
6,154
0
80.8
90.9
100.0
19.2
9.1
0.0
69.7
Prospect Dam
Monday 19 April
23,217
33,330
31,124
29,808
22,702
-7,907
-6,591
515
93.4
89.4
68.1
-23.7
-19.8
1.5
70.3
Wingecarribee Reservoir
Shoalhaven
Monday 19 April
16,952
24,130
19,180
19,345
18,442
-2,228
-2,393
-1,490
79.5
80.2
76.4
-9.2
-9.9
-6.2
68.9
Fitzroy Falls Reservoir
Shoalhaven
Monday 19 April
6,859
9,950
7,328
8,320
8,131
-469
-1,461
-1,272
73.6
83.6
81.7
-4.7
-14.7
-12.8
100.0
Tallowa Dam
Shoalhaven
The ‘capacity’ for Tallowa Dam only refers to the water available to be transferred to Sydney, when the total system storage is below 75%. The dam can hold 90,000 ML but 7,500 ML is available for transfers.
Monday 19 April
7,500
7,500
21,800
7,500
7,500
-14,300
0
0
100.0
100.0
100.0
0.0
0.0
0.0
88.4
Blue Mountains Dams
Blue Mountains
Monday 19 April
2,554
2,890
2,673
2,844
2,634
-119
-290
-80
92.5
98.4
91.1
-4.1
-10.0
-2.8
Warragamba Catchment
0.0
0.0
1,082
Nepean Catchment
0.0
0.0
1,377
Woronora Catchment
0.0
0.0
1,280
Shoalhaven Catchment
0.0
0.4
1,336
Blue Mountains Catchments
0.0
0.0
1,816
Avon Dam
1
36
8,141
Nepean Dam
31
228
12,285
Cataract Dam
16
186
14,537
Cordeaux Dam
13
116
6,993
Woronora Dam
18
171
6,339
Broughtons Pass Weir
21
256
14,550
Pheasants Nest Weir
37
423
33,400
Tallowa Dam
778
7,703
426,171