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.

April 2026 Inflows 

Murray, Goulburn & Ovens System Storages

Table of inflows for April 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) 15,627 51,540 15,983 15,845 3,764 2,574
POE 48%  49% 54% 71% 43% 39%
% of Average 72%  76%  64% 51% 59% 79%

 

Broken, Loddon & Campaspe System Storages

Table of inflows for April 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) 0 0 0 0 0
POE Min Min Min Min Min
% of Average 0% 0% 0% 0% 0%

 

Year to Date Inflows: July 2025 to April 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 2025 to April 2026 Murray System Goulburn System Ovens System
Dartmouth Dam Hume Dam Lake Eildon Goulburn Weir Lake Buffalo Lake William Hovell
Inflow (ML) 522,726 892,150 568,565 382,365 173,284 96,401
POE 67%  88% 85% 89% 77% 77%
% of Average 76%  42% 51% 40% 53% 61%

 

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 2025 to April 2026 Broken System Loddon System Campaspe System
Lake Nillahcootie Cairn Curran Reservoir Tullaroop Reservoir Laanecoorie Reservoir Lake Eppalock
Inflow (ML) 12,402 10,394 4,136 1,157 11,078
POE 83%  91% 91% 93% 91%
% of Average 27%  12% 10% 3% 9%

 

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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Dartmouth Reservoir inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 51  8.0  18  44  111
July 2025 80  12  24  75  185
August 2025 43  16  36  98  220
September 2025 122  21  61  122  239
October 2025 64  22  43  116  250
November 2025 52  5.0  26  63  147
December 2025 50  2.0  15  35  83
January 2026 28  2.0  7.0  20  47
February 2026 25  0.0  4.0  13  34
March 2026 31  1.0  4.0  12  36
April 2026 16  2.0  4.0  15  40
May 2026    4.0  10  23  68
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Hume Dam inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 65  22  48  118  340
July 2025 154  34  69  192  674
August 2025 77  12  103  296  749
September 2025 186  33  157  326  781
October 2025 102  20  100  315  786
November 2025 88  1.0  68  187  453
December 2025 69  0.0  34  111  250
January 2026 9.7  0.0  16  72  159
February 2026 8.5  1.0  12  45  99
March 2026 64  0.0  8.0  43  113
April 2026 55  6.0  12  50  138
May 2026    9.0  26  73  196
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Lake Eildon inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 17  11  22  71  239
July 2025 87  12  55  163  404
August 2025 98  16  84  228  489
September 2025 128  20  78  200  424
October 2025 62  10  47  140  349
November 2025 73  9.0  27  73  180
December 2025 49  8.0  15  40  107
January 2026 19  5.0  10  23  48
February 2026 16  2.0  6.0  15  33
March 2026 21  0.0  5.0  15  36
April 2026 16  4.0  7.0  17  43
May 2026    8.0  13  31  102
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Goulburn Weir inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 24  13  22  61  219
July 2025 49  22  43  114  336
August 2025 66  8.0  55  164  383
September 2025 61  21  56  151  372
October 2025 48  22  42  110  314
November 2025 44  11  24  66  184
December 2025 42  8.0  16  42  104
January 2026 18  8.0  13  27  58
February 2026 13  4.0  8.0  19  41
March 2026 27  5.0  9.0  20  46
April 2026 16  6.0  10  23  56
May 2026    10  15  37  114
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Lake Buffalo inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 11  0.0  4.8  22  74
July 2025 45  0.1  11  44  132
August 2025 32  0.1  15  61  147
September 2025 36  0.1  14  55  129
October 2025 14  0.0  9.2  40  118
November 2025 20  0.0  5.1  22  71
December 2025 14  0.6  2.6  10  38
January 20265 3.6  0.1  1.4  5.1  15
February 2026 1.5  0.1  0.6  2.5  8.5
March 2026 3.5  0.2  0.5  2.2  10
April 2026 3.8  0.2  0.6  2.8  14
May 2026    0.3  1.4  6.9  31
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Lake William Hovell inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 4.1  0.2  3.0  12  38
July 2025 25  0.0  6.7  25  61
August 2025 16  0.0  11  34  66
September 2025 18  0.0  9.9  31  58
October 2025 7.5  0.0  6.5  21  47
November 2025 12  0.8  3.8  11  27
December 2025 7.7  0.9  2.2  5.9  16
January 2026 2.7  0.5  1.2  3.1  7.4
February 2026 1.4  0.3  0.6  1.6  4.7
March 2026 2.5  0.3  0.5  1.5  6.0
April 2026 2.6  0.2  0.4  1.8  8.2
May 2026    0.3  1.0  4.1  17
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Lake Nillahcootie inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 0.1  0.0  0.2  1.5  12
July 2025 6.6  0.0  0.6  5.1  25
August 2025 3.7  0.0  1.1  9.1  28
September 2025 2.2  0.0  0.7  7.4  24
October 2025 0.5  0.0  0.2  3.4  19
November 2025 0.5  0.0  0.0  1.3  7.0
December 2025 0.0  0.0  0.0  0.4  2.6
January 2026 0.0  0.0  0.0  0.1  1.1
February 2026 0.2  0.0  0.0  0.0  0.7
March 2026 0.0  0.0  0.0  0.1  1.2
April 2026 0.0  0.0  0.0  0.1  1.4
May 2026    0.0  0.0  0.4  3.2
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Cairn Curran Reservoir inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 0.0  0.0  0.4  3.5  26
July 2025 1.1  0.0  1.1  7.7  42
August 2025 2.7  0.0  1.9  14  61
September 2025 3.5  0.0  1.4  11  54
October 2025 1.1  0.0  0.6  4.8  29
November 2025 1.4  0.0  0.0  1.3  10
December 2025 0.5  0.0  0.0  0.5  4.0
January 2026 0.0  0.0  0.0  0.2  1.6
February 2026 0.0  0.0  0.0  0.1  2.2
March 2026 0.0  0.0  0.0  0.2  1.7
April 2026 0.0  0.0  0.0  0.4  2.4
May 2026    0.0  0.0  1.1  7.4
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Tullaroop Reservoir inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 0.2  0.0  0.1  1.0  7.3
July 2025 0.6  0.1  0.3  2.2  18
August 2025 0.9  0.0  0.5  4.9  27
September 2025 1.1  0.0  0.6  5.4  27
October 2025 0.6  0.0  0.2  2.3  17
November 2025 0.7  0.0  0.1  0.9  6.4
December 2026 0.2  0.0  0.1  0.4  2.5
January 2026 0.0  0.0  0.0  0.2  1.3
February 2026 0.0  0.0  0.0  0.2  1.2
March 2026 0.0  0.0  0.1  0.3  1.0
April 2026 0.0  0.0  0.1  0.3  0.9
May 2026    0.0  0.1  0.5  2.4
June 2026    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 2025/2026. Actual data compared to four climate scenarios.
Table of actual Lake Eppalock inflows for 2025/2026 compared to four climate scenarios
Month Actual Inflow (GL) Extreme Dry Scenario (GL) Dry Scenario (GL) Average Scenario (GL) Wet Scenario (GL)
June 2025 0.1  0.0  0.0  3.2  38
July 2025 1.6  0.0  0.9  11  67
August 2025 2.5  0.0  2.0  21  85

September 2025

 4.1  0.0  1.5  16  80
October 2025 1.5  0.0  0.3  6.5  46
November 2025 0.9  0.0  0.0  1.6  16
December 2025 0.0  0.0  0.0  0.2  5.5
January 2026 0.0  0.0  0.0  0.0  1.7
February 2026 0.2  0.0  0.0  0.0  2.0
March 2026 0.4  0.0  0.0  0.0  2.3
April 2026 0.0  0.0  0.0  0.0  2.7
May 2026    0.0  0.0  0.6  8.9
June 2026    0.0  0.0  3.2  38