22.1 Groundwater allocation announcements

Supporting Information

This line item refers to the total water allocation for all groundwater supply in the Perth region not related to urban water systems or irrigation schemes. It includes groundwater allocations for individual users in the agricultural and industrial sectors.

The volume disclosed in the Statement of changes in water assets and water liabilities represents the volume of:

  • water announced for groundwater allocation; and
  • new licences and other variations that were granted during the 2010–11 year.

The water supply licences are divided into licence entitlement purposes. The annual allocation announcement for each licence purpose for the 2010–11 year are given in the following table.

Annual groundwater allocation announcement for each licence purpose for the 2010–11 year

Licence category





Commercial and institutional


Environment and conservation


Industry and power generation




Parks, gardens and recreation


Stock and domestic







Quantification Approach

Data Source

Department of Water: Water Resource Licensing database.

Provided by

Department of Water.


Most of these licences are issued to licence holders for periods of generally between one and ten years, with an annual abstraction amount specified and with annual compliance arrangements in place.

The total groundwater allocation announcement is assumed to equal 100% of the annual entitlement.

Assumptions, Limitations, Caveats and Approximations

As at 30 June 2011, a total of 1,617 groundwater licences had been issued in perpetuity. The average annual allocation of these licences is 2.4 ML, which accounts for only 1% of the total annual groundwater allocation. These licences are not subject to most of the compliance arrangements that the other licences have and do not have an anniversary date. The licence anniversary date for these licences is deemed to be 30 June 2011 for the purposes of calculating the annual allocation for the 2010–11 year. Almost all of these licences were issued more than 10 years ago.

Uncertainty Information

There is no uncertainty associated with this value

Comparative year

The following table presents substantive changes in the line item reported in this 2011 Account with the corresponding line item in the 2010 Account.


Comparative year information for line item 22.1

2011 Account line item

2010 Account line item

2011 Account volume for the 2009–10 year (ML)

2010 Account volume for the 2009–10 year (ML)

Change from the 2010 Account to the 2011 Account

22.1 Groundwater allocation announcements Groundwater allocation announcement–other lumped holders



Change in line item name and number