Storage Inflow Data

Inflow ML: Inflow volume that storage has received in Mega Litres (ML)

POE: The probability of exceedance describes the likelihood of a specific  volume being exceeded in the given time period. E.g. 90% POE means that 90 out of 100 times we would expect higher inflow volumes. A 50% POE is equal to a median average.

% Average: Mean Average - The value obtained by dividing the sum of all inflow volumes by the number of years data is available. Therefore a 50% mean average does not equal a 50% POE.

The inflow statistics are based on historical flow records that have been adjusted to match climate conditions observed since 1975. 

July 2026 Inflows 

Murray, Goulburn & Ovens System Storages

Table of inflows for July 2026 for the Murray (Dartmouth and Hume), Goulburn (Eildon and Goulburn Weir) & Ovens (Buffalo and William Hovell) Storages.
Monthly Inflow Murray System Goulburn System Ovens System
Dartmouth Dam Hume Dam Lake Eildon Goulburn Weir Lake Buffalo Lake William Hovell
Inflow (ML) 162,370  450,550  294,441 306,050 139,694 61,028
POE 17%  19% 21% 13% <10% <10%
% of Average 173%  148%  145% 191% 230% 201%

 

Broken, Loddon & Campaspe System Storages

Table of inflows for July 2026 for the Broken (Nillahcootie), Loddon (Cairn Curran, Tullaroop and Laanecoorie) & Campaspe (Eppalock) Storages.
Monthly Inflow Broken System Loddon System Campaspe System
Lake Nillahcootie Cairn Curran Reservoir Tullaroop Reservoir Laanecoorie Reservoir Lake Eppalock
Inflow (ML) 15,412 34,952 10,136 6,226 76,529
POE 19% 14% 18% 26% <10%
% of Average 159% 214% 156% 87% 307%

 

Year to Date Inflows: July 2026 to July 2026

Murray, Goulburn & Ovens System Storages

Table of inflows - Year to date - for the Murray (Dartmouth and Hume), Goulburn (Eildon and Goulburn Weir) & Ovens (Buffalo and William Hovell) Storages.
Water year 2025/2026: July 2026 to July 2026 Murray System Goulburn System Ovens System
Dartmouth Dam Hume Dam Lake Eildon Goulburn Weir Lake Buffalo Lake William Hovell
Inflow (ML) 162,370  450,550  394,441 306,050 139,694 61,028
POE 17%  19% 21% 13% <10% <10%
% of Average 173%  148% 145% 191% 230% 201%

 

Broken, Loddon & Campaspe System Storages

Table of inflows -Year to date - for the Broken (Nillahcootie), Loddon (Cairn Curran, Tullaroop and Laanecoorie) & Campaspe (Eppalock) Storages.
Water year 2025/2026: July 2026 to July 2026 Broken System Loddon System Campaspe System
Lake Nillahcootie Cairn Curran Reservoir Tullaroop Reservoir Laanecoorie Reservoir Lake Eppalock
Inflow (ML) 15,412 34,952 10,136 6,226 76,529
POE 19%  14% 18% 26% <10%
% of Average 159%  214% 156% 87% 307%

 Inflow data for 2025/2026 against different climate scenarios

Climate Scenarios

The scenarios for different inflow conditions were produced using the following terminology: 

  • Wet Scenario : Inflow volumes that are greater in 10 years out of 100 (10% POE)
  • Average Scenario : Inflow volumes that are greater in 50 years out of 100 (50% POE and not average)
  • Dry Scenario : Inflow volumes that are greater in 90 years out of 100 (90% POE)
  • Extreme Dry Scenario : Inflow volumes that are greater in 99 years out of 100 (99% POE)

In the inflow graphs below actual inflow data is compared to these four scenarios. Inflows are measured in Giga Litres (GL).

Murray System - Dartmouth Dam

Graph of Dartmouth Reservoir Inflows for 2023-24 Actual data until July.
Dartmouth Dam Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Dartmouth Reservoir inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 88  8.0  18  44  111
July 2026 162  12  24  75  185
August 2026    16  36  98  220
September 2026    21  61  122  239
October 2026    22  43  116  250
November 2026    5.0  26  63  147
December 2026    2.0  15  35  83
January 2027    2.0  7.0  20  47
February 2027    0.0  4.0  13  34
March 2027    1.0  4.0  12  36
April 2027    2.0  4.0  15  40
May 2027    4.0  10  23  68
June 2027    8.0  18  44  111

Murray System - Hume Dam

Graph of Hume Dam Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Hume Dam Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Hume Dam inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 225  22  48  118  340
July 2026 451  34  69  192  674
August 2026    12  103  296  749
September 2026    33  157  326  781
October 2026    20  100  315  786
November 2026    1.0  68  187  453
December 2026    0.0  34  111  250
January 2027    0.0  16  72  159
February 2027    1.0  12  45  99
March 2027    0.0  8.0  43  113
April 2027    6.0  12  50  138
May 2027    9.0  26  73  196
June 2027    22  48  118  340

Goulburn System - Lake Eildon

Graph of Lake Eildon Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Graph of Lake Eildon Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Lake Eildon inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 122  11  22  71  239
July 2026 294  12  55  163  404
August 2026    16  84  228  489
September 2026    20  78  200  424
October 2026    10  47  140  349
November 2026    9.0  27  73  180
December 2026    8.0  15  40  107
January 2027    5.0  10  23  48
February 2027    2.0  6.0  15  33
March 2027    0.0  5.0  15  36
April 2027    4.0  7.0  17  43
May 2027    8.0  13  31  102
June 2027    11  22  71  239

Goulburn System - Goulburn Weir

Graph of Goulburn Weir Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Goulburn Weir Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Goulburn Weir inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 94  13  22  61  219
July 2026 306  22  43  114  336
August 2026    8.0  55  164  383
September 2026    21  56  151  372
October 2026    22  42  110  314
November 2026    11  24  66  184
December 2026    8.0  16  42  104
January 2027    8.0  13  27  58
February 2027    4.0  8.0  19  41
March 2027    5.0  9.0  20  46
April 2027    6.0  10  23  56
May 2027    10  15  37  114
June 2027    13  22  61  219

Ovens System - Lake Buffalo

Graph of Lake Buffalo Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Lake Buffalo Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Lake Buffalo inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 52  0.0  4.8  22  74
July 2026 140  0.1  11  44  132
August 2026    0.1  15  61  147
September 2026    0.1  14  55  129
October 2026    0.0  9.2  40  118
November 2026    0.0  5.1  22  71
December 2026    0.6  2.6  10  38
January 2027    0.1  1.4  5.1  15
February 2027    0.1  0.6  2.5  8.5
March 2027    0.2  0.5  2.2  10
April 2027    0.2  0.6  2.8  14
May 2027    0.3  1.4  6.9  31
June 2027    0.0  4.8  22  74

Ovens System - Lake William Hovell

Graph of Lake William Hovell Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Lake William Hovell Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Lake William Hovell inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 32  0.2  3.0  12  38
July 2026 61  0.0  6.7  25  61
August 2026    0.0  11  34  66
September 2026    0.0  9.9  31  58
October 2026    0.0  6.5  21  47
November 2026    0.8  3.8  11  27
December 2026    0.9  2.2  5.9  16
January 2027    0.5  1.2  3.1  7.4
February 2027    0.3  0.6  1.6  4.7
March 2027    0.3  0.5  1.5  6.0
April 2027    0.2  0.4  1.8  8.2
May 2027    0.3  1.0  4.1  17
June 2027    0.2  3.0  12  38

Broken System - Lake Nillahcootie

Graph of Lake Nillahcootie Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Lake Nillahcootie Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Lake Nillahcootie inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 2.8  0.0  0.2  1.5  12
July 2026 15  0.0  0.6  5.1  25
August 2026    0.0  1.1  9.1  28
September 2026    0.0  0.7  7.4  24
October 2026    0.0  0.2  3.4  19
November 2026    0.0  0.0  1.3  7.0
December 2026    0.0  0.0  0.4  2.6
January 2027    0.0  0.0  0.1  1.1
February 2027    0.0  0.0  0.0  0.7
March 2027    0.0  0.0  0.1  1.2
April 2027    0.0  0.0  0.1  1.4
May 2027    0.0  0.0  0.4  3.2
June 2027    0.0  0.2  1.5  12

Loddon System - Cairn Curran Reservoir

Graph of Cairn Curran Reservoir Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Cairn Curran Reservoir Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Cairn Curran Reservoir inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 5.4  0.0  0.4  3.5  26
July 2026 35  0.0  1.1  7.7  42
August 2026    0.0  1.9  14  61
September 2026    0.0  1.4  11  54
October 2026    0.0  0.6  4.8  29
November 2026    0.0  0.0  1.3  10
December 2026    0.0  0.0  0.5  4.0
January 2027    0.0  0.0  0.2  1.6
February 2027    0.0  0.0  0.1  2.2
March 2027    0.0  0.0  0.2  1.7
April 2027    0.0  0.0  0.4  2.4
May 2027    0.0  0.0  1.1  7.4
June 2027    0.0  0.4  3.5  26

Loddon System - Tullaroop Reservoir

Graph of Tullaroop Reservoir Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Tullaroop Reservoir Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Tullaroop Reservoir inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 1.1  0.0  0.1  1.0  7.3
July 2026 10  0.1  0.3  2.2  18
August 2026    0.0  0.5  4.9  27
September 2026    0.0  0.6  5.4  27
October 2026    0.0  0.2  2.3  17
November 2026    0.0  0.1  0.9  6.4
December 2026    0.0  0.1  0.4  2.5
January 2027    0.0  0.0  0.2  1.3
February 2027    0.0  0.0  0.2  1.2
March 2027    0.0  0.1  0.3  1.0
April 2027    0.0  0.1  0.3  0.9
May 2027    0.0  0.1  0.5  2.4
June 2027    0.0  0.1  1.0  7.3

Campaspe System- Lake Eppalock

Graph of Lake Eppalock Inflows for 2023-24. Actual data until July compared to four climate scenarios.
Lake Eppalock Inflows for 2026/2027. Actual data compared to four climate scenarios.
Table of actual Lake Eppalock inflows for 2026/2027 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2026 25  0.0  0.0  3.2  38
July 2026 77  0.0  0.9  11  67
August 2026    0.0  2.0  21  85

September 2026

    0.0  1.5  16  80
October 2026    0.0  0.3  6.5  46
November 2026    0.0  0.0  1.6  16
December 2026    0.0  0.0  0.2  5.5
January 2027    0.0  0.0  0.0  1.7
February 2027    0.0  0.0  0.0  2.0
March 2027    0.0  0.0  0.0  2.3
April 2027    0.0  0.0  0.0  2.7
May 2027    0.0  0.0  0.6  8.9
June 2027    0.0  0.0  3.2  38