Water Account, Australia methodology

Latest release
Reference period
2021-22 financial year

The Water Account, Australia (WAA) is an environmental-economic account produced by the Australian Bureau of Statistics (ABS), which is compiled, as far as possible, in accordance with the System of Environmental-Economic Accounting (SEEA) and the SEEA-Water frameworks. It includes water supply and use tables for both physical volumes and monetary values.

The following section outlines the broad concepts, sources, and methods for the Water Account. 

Concepts

The WAA was developed using the SEEA and the SEEA-Water frameworks. SEEA was first published by the United Nations in 1993 and was elevated to an international statistical standard in 2012. The SEEA framework extends the boundaries of the System of National Accounts (SNA) framework to include environmental resources, which occur outside the economic production boundaries that are measured by the SNA.

Water supply and use tables describe water flows from the environment to the economy, within the economy, and from the economy to the environment (SEEA-Water, 2012, S. 3.1). This includes:

  • extraction of water from the environment by economic units (e.g., surface water and groundwater extraction, as well as sea water for desalination)
  • flows of water within the economy (e.g., supply and use of distributed and recycled water)
  • final discharges of water from economic units back to the environment (return flows).

The monetary supply and use tables present aggregates of monetary data (dollars) in terms of the supply and use of water within the Australian economy. Monetary supply and use tables illustrate the economic transactions associated with the use of distributed and reuse water and the provision of sewerage, drainage and wastewater services.

Key concepts are listed below:

Self-extracted water (extraction of water from the environment)

Refers to the movement of water from the environment into the economy, either permanently or temporarily. SEEA identifies the environment as the supplier and the industry/household as the user (SEEA-Water, S 3.6). Extracted water can be further classified into three main sources:

  • Surface water: water on the surface of continents such as in a river, lake, or wetland.
  • Groundwater: water which collects in porous layers of underground formations known as aquifers.
  • Sea water for desalination: saline water that is extracted from the ocean or marine estuaries with the express purpose of creating usable water.

Distributed water

Refers to water flows from one user (or supplier) to another user after extraction. This includes the supply and use of potable and non-potable water from one economic unit to another (SEEA-Water, 2012 S 3.31). In the WAA, distribution losses are recorded as water use by the industry supplying the water (usually the Water supply, sewerage and drainage services industry).

Bulk water

Water transferred/delivered from one water supplier/provider to another water supplier/provider. This distinction is required to ensure the same volume of water is not counted twice (in the physical supply and use tables) as the water moves through the economy; however, these exchanges are valued in the monetary tables.

Wastewater

Represents water that has been used by an economic unit or household, and then transferred between economic units. The industry collecting wastewater is a “user” in the physical supply and use tables, while in the monetary tables that industry is a “supplier” of sewerage and wastewater services (SEEA-Water S 3.9). The most commonly understood form of wastewater is sewage; however, non-sewage wastewater products are also included (SEEA-Water, 2012, S 3.12). Stormwater and drainage water are not currently included in the supply and use tables in the WAA, as much of this is simply redirected into nearby water systems. However, in Australia, there is some infiltration of stormwater into sewerage systems in many regions, so naturally some stormwater is included in the wastewater estimates. 

Reuse water

Wastewater delivered to a user for further use, with or without prior treatment. Represents the transformation of wastewater into another economic product that is distributed throughout the economy (SEEA-Water, 2012, S 3.12). In the WAA this includes the transformation of stormwater and drainage water. Recycling within industrial sites (also known as “on-site recycling") is excluded.

Return flows

Represents the flows of water from industries and households to the environment. This excludes flows of water to wastewater treatment facilities but includes flows of water from treatment facilities directly to the environment. The SEEA records return flows as use by the environment (SEEA-Water, 2012, S 3.16).

Water use

Water intake by an economic unit, or the economy. Water use is the sum of the amount of water extracted from the environment (including surface water, groundwater and sea water for desalination) and water use within the economy (i.e. water received from other economic units as distributed water, reuse water and wastewater). Note that this differs to the definition of water consumption in that it is a gross measure, rather than netting out the volumes of return flows of water to the environment, wastewater supply and water supplied to other users. Note that the direct use of precipitation on to land, which leads to the use of the water held in soil by plants (e.g. rainfed agriculture), is outside of the scope of this publication and is not included.

In the physical supply and use tables (Tables 2 to 10 in the Data downloads section), water use is presented in column O and is equal to the sum of the use of self-extracted water (column J), distributed water (column K), wastewater collection (column L) and reuse water (column M).

Water supply

Water leaving/flowing out from an economic unit. Water supply is the sum of water supply to other economic units (distributed water, reuse water and wastewater) and water supply to the environment (return flows).

Water consumption

The amount of water that is extracted from the environment by the economy (industries and households) for use, which is not distributed to other economic units nor returned to an inland water resource (e.g. river, dam, lake, creek), because during use it has been incorporated into products, evaporated, transpired by plants, or consumed by households or livestock. It may include losses due to evaporation occurring in distribution and apparent losses due to illegal tapping as well as malfunctioning metering. Note that this differs to the definition of water use (a gross measure) in that it is a net measure, netting out the volumes of water in return flows, wastewater supply and water supplied to other users.

In the physical supply and use tables (Tables 2 to 10 in the Data downloads section), water consumption is presented in column P and is equal to water use (see above) minus water supply (the sum of the supply of distributed water (column C), wastewater (column D), reuse water (column E) and return flows to the environment (column F)).

Industry classification

The WAA uses the Australian and New Zealand Standard Industrial Classification (ANZSIC) for its industry classification. The ANZSIC is implemented for all ABS industry-classified statistics and is a fundamentally important reference for organisations wishing to interpret these statistics or to compile their own statistics on a comparable basis.

Households’ expenditure

In the monetary account, this refers to final consumption expenditure by households, or expenditure incurred by resident households on the consumption of water and related services (including sewerage services). 

Social benefits paid in kind

Social benefits paid in kind consist of goods and services provided to households by government and private, non-market producers (non-profit institutions serving households, or NPISHs), either free or at prices that are not economically significant (SNA, 2008, S 8.141). 

Taxes

Compulsory, unrequited payments, in cash or in kind, made by institutional units to government units (SNA, 2008, S 7.71). 

Subsidies

Current unrequited payments that government units, including non-resident government units, make to enterprises on the basis of the levels of their production activities or quantities or values of the goods or services that they produce (SNA, 2008, S 7.98). 

Exports

Exports of goods and services consist of sales, barter, or gifts or grants, of goods and services from residents to non-residents (SNA 1993, S 14.88).

Imports

Imports of goods and services consist of sales, barter, or gifts or grants, of goods and services from non-residents to residents (SNA 1993, S 14.88).

Data sources

Water Supply and Sewerage Services (WSSS) collection

Description: the WSSS collection is an ABS census of all known water and wastewater suppliers/utilities across Australia. It collects physical and monetary data on water supply, water treatment, and return flows of water to the environment.

Frequency: annual, financial year.

Series used: 2014-15 to 2021-22 inclusive.

Geography: state/territory and national.

Key data used:

Water supply, sewerage and drainage services industry estimates for:

  • self-extracted water
  • water supply to industries and households
  • wastewater collected
  • return flows
  • monetary supply.

The WSSS is used as a control total for use of distributed and reuse water by industries; it also sets the unit price for agriculture water use.

Energy and Water Survey (EWS)

Description: the Energy and Water Survey (EWS) is an ABS survey conducted annually – it was first run with respect to the 2021-22 reference period. This survey has replaced the Energy, Water and Environment Survey (EWES) and the Environmental Indicators Survey (EIS). Prior to 2021-22, the EWES was a survey conducted every three years, with the EIS conducted in the intervening two years. The EWS collects a comprehensive range of water data across the mining and manufacturing industries, as well as providing benchmark estimates for selected data items.

Frequency: annual EWS with a financial year reference period..

Series used: 2014-15 and 2017-18 for EWES; 2015-16, 2016-17, 2018-19, 2019-20, and 2020-21 for EIS; 2021-22 for EWS.

Geography: state/territory and national (EWS and EWES); national only (EIS).

Key data used:

Self-extracted use, distributed supply, reuse supply, and return flows data for the following industries, used to disaggregate industry division level use data from the WSSS collection:

  • Mining (EWS, EWES and EIS)
  • Manufacturing (EWS, EWES and EIS)
  • Waste collection, treatment and disposal services (EWES and EIS)
  • Electricity and gas supply (EWES and EIS).

Price paid for distributed and reuse water for the following industries:

  • Mining (EWS, EWES and EIS)
  • Manufacturing (EWS, EWES and EIS)
  • Electricity and gas supply (EWES and EIS)
  • Waste collection, treatment and disposal services (EWES and EIS)
  • Other industries (EWES).

Expenditure of sewerage and wastewater services use for the following industries:

  • Agriculture (EWES)
  • Mining (EWES and EWS)
  • Manufacturing (EWES and EWS)
  • Electricity and gas supply (EWES)
  • Waste collection, treatment and disposal services (EWES)
  • Other industries (EWES).

Rural Environment and Agricultural Commodities Survey (REACS)/Agricultural Census

Description: the REACS, which has been discontinued (see below), was run annually by the ABS in between the five-yearly Agricultural Census. The scope of the REACS and Agricultural Census collection was all businesses undertaking agricultural activity in Australia with an estimated value of agricultural operations (EVAO) of $40,000 or greater.

Frequency: the REACS was run annually in the years between the five yearly Agricultural Census. The final REACS reference period was 2021-22. The last Agricultural Census reference period was 2020-21.

Series used: 2014-15, 2016-17, 2017-18, 2018-19, 2019-20 and 2021-22 for REACS; 2015-16 and 2020-21 for Agricultural Census.

Geography: state/territory and national.

Key data used:

  • to estimate Agriculture self-extracted water use.

Note:  the agricultural water use data presented in this publication for the period 2014-15 to 2020-21 is different to the data presented in the ABS publication Water Use on Australian Farms (WUOAF). This is because: (a) the multiple data sources used for the WAA compilation, compared to the single source of ABS survey data (REACS) used to produce WUOAF; (b) the WUOAF publication presents an ‘activity view’ of agriculture – therefore, its estimates of water use are slightly different to the ‘industry view’ estimates presented in the physical water supply and use tables in WAA; and (c) the scope of WUOAF is all businesses undertaking agricultural activity in Australia with an estimated value of agricultural operations (EVAO) of $40,000 or greater, while the WAA includes all agricultural businesses.

The Agriculture ‘industry' view presented in WAA includes only agricultural activity that occurs in businesses where the primary income-producing activity (i.e. the activity with value added that exceeds the value added of any other activity carried out by the same business) of the business is agricultural production.

Also note that losses from the distribution system for agriculture (e.g. evaporation and seepage from irrigation channels) are attributed to the Water supply industry rather than the Agriculture industry in WAA.

Changes to agricultural water use statistics for 2021-22

The quality of responses to the 2021-22 Rural Environment and Agricultural Commodities Survey was lower than required to produce a full set of agricultural statistics. Consequently, the ABS agricultural publications, with respect to the 2021-22 reference period, contain a reduced set of agricultural commodity area and production statistics at the national, state and territory levels.

In addition, agricultural water use statistics, including estimates of the Gross Value of Irrigated Agricultural Production (GVIAP) and the publication Water Use on Australian Farms,  will not be produced for 2021-22. Total agricultural water use statistics at the national, state and territory levels are presented in Water Account, Australia, 2021-22. However, the Agriculture industry subdivision has not been split into smaller industry groups as in previous editions of the publication (e.g. Fruit and Tree Nut growing, Sheep, Beef Cattle and Grain Farming, Dairy Cattle Farming, etc.).

Modernising ABS’ agricultural statistics

The ABS will no longer undertake large agricultural surveys, including the annual Rural Environment and Agricultural Commodities Survey and the 5 yearly Agricultural Census.

Instead, the ABS will use existing data from government, industry, and commercial sources to produce official agricultural statistics for the 2022-23 financial year onwards. These existing data sources will be complemented by a small number of short surveys of agricultural businesses.

This new approach to producing agricultural statistics aims to reduce reporting burden on farmers and increase the range and regional detail of agricultural statistics.

An information paper was released on the ABS website in early 2023, outlining further detail on the ABS' future approach to the production of official agricultural statistics.

Methods are being investigated to understand water use for different commodity groups, however, it is unlikely that these will be ready for producing statistics for 2022-23. It is our aim to replace ABS surveys with other sources of agricultural data, so that in the future the full suite of agricultural water use statistics, including information previously published in WUOAF and GVIAP will once again be available.

Australian National Accounts: State and Territory accounts

Description: contains state and territory estimates of gross domestic product (referred to as gross state product) and its components.

Frequency: annual.

Series used: Industry Gross Value Added (GVA): Chain volume measures, Industry Gross Value Added 2014-15 to 2021-22.

Geography: state/territory.

Key data used:

  • used to create state/territory indexes to move EWS/EWES data forward and backwards
  • provides Industry Gross Value Added (GVA) estimates for the summary tables
  • social benefits paid in kind, taxes, subsidies, imports and exports.

National Performance Report – Bureau of Meteorology

Description: the Bureau of Meteorology’s Urban National Performance Reports benchmark the pricing and service quality of Australian urban water utilities. Indicators include water resource supply and usage, financial operations, bills and pricing, assets, water quality compliance and customer performance. The reports are published annually and prepared independently by the Bureau of Meteorology, State and Territory governments, and the Water Services Association of Australia; the reports support commitments under the National Water Initiative.

Frequency: annual

Series used: 2014-15 to 2021-22

Geography: business unit record level

Key data used: estimation of household price of water

Summary indicators: in addition to the data that feeds into the supply and use data section, the summary tables include data to assist users in contextualising the presented information. The sources for these data items are noted below.

Australian Demographic Statistics

Description: this quarterly release contains the most recent estimates of the resident population (ERP) of Australia and the states and territories based on the results of the 2021 Census of Population and Housing held on 9 August 2021, and the addition of quarterly components of population growth. The ABS has used the 2021 Census to produce final rebased estimates of the resident population. This release contains the latest available statistics on births, deaths (including infant deaths) and overseas and interstate migration.

Frequency: quarterly

Series used: June 2015 to June 2022

Geography: state/territory and national

Key data used: estimated residential population as at end of financial year.

Household and Family Projections, Australia

Description: 

Household estimates are based on a combination of:

  • latest estimated resident population
  • proportion of people living in private dwellings, from Censuses
  • average household sizes from Censuses
  • Census household counts
  • Post Enumeration Survey household estimates

These estimates differ from those published in Household and Family Projections, Australia, 2016 to 2041 as they are based on estimated resident population rather than population projections.

Frequency: every 5 years with annual estimates

Series used: estimated resident population for 2014-15 to 2021-22.

Geography: state/territory and national

Key data used: estimate of household numbers.

Bureau of Meteorology, Climate change – trends and extremes

Description: provides climate indicators available for Australia, states and territories as well as other geographies.

Frequency: monthly

Series used: financial years - 2014-15 to 2021-22

Geography: state/territory and national

Key data used: area-averaged rainfall by state/territory and national.

Bureau of Meteorology, Water Storage Dashboard

Description: a dashboard featuring information on 305 major water storages around Australia

Frequency: daily

Series used: 30 June 2015 to 30 June 2022

Geography: state/territory and national

Key data used: estimates of accessible volume in major dam storages as at end of financial year.

Methods

The methods used to compile the data in the WAA have been split into four broad groups that align with the data cubes published in this account:

  1. Physical supply and use
  2. Monetary supply and use
  3. Summary table.

All data items in the WSSDS industry highlights data cube were sourced directly from the WSSS collection with no notable methodological adjustments.

Methods - Physical supply and use of water

Physical supply of water

The general methods used to compile the physical supply and use tables of the water account are relatively straightforward. Data from the WSSS collection operates as a stabilising component, acting as a spine for the compilation. The basic premise behind this decision is that the WSSS collection is a relatively complete census of all water providers – a population who, by necessity, understand the subject matter. The EWS/EWES/EIS surveys are utilised to inform industry splits, excluding Agriculture, and provide detail that is lacking in the WSSS collection instrument. The Agricultural Census and surveys (REACS) fill a similar niche for Agriculture.

With this in mind the following represents a broad outline of how the data feeds into each supply and use water category.

Self-extracted water: the sum of all self-extracted water use sets the supply figure for the environment to the economy.

Distributed and reuse water: derived from the WSSS collection, the vast majority of water is supplied by the Water supply, sewerage and drainage services industry. EWS/EWES water supply estimates set total supply for water providers outside of the Water supply, sewerage and drainage services industry, while total use by industry is used to allocate these data to states/territories.

Wastewater: currently the WAA does not include estimates for the supply of wastewater to sewerage systems, split by individual industries and households. This is a known data gap that will be explored in future iterations of the WAA. In the interim, the total wastewater supplied is estimated in the account. The total wastewater supply is aligned to the total wastewater received by subdivision 28, sourced from the WSSS collection.

Return flows: formerly referred to as "regulated discharges" in the WAA, return flows estimates are sourced from the WSSS collection (state/territory and national) and EWS/EWES (national) surveys, however no data is currently available for return flows from Agriculture and wastewater flows from households and other industries. These are known data gaps that will be explored in future iterations of the WAA. Total use by the Waste collection, treatment and disposal services industry is used to allocate EWS/EWES national estimates to state/territory estimates. Mining and Manufacturing utilise total self-extracted water in the same way. For the Electricity and gas industry, return flows estimates were aligned with self-extracted surface water. 

Physical use of water

Self-extracted water:  the WSSS, EWS, EWES, EIS, and REACS surveys all collect data on self-extracted water use – these data are utilised directly. Self-extracted use for hydroelectricity is modelled using a combination of data collected directly from hydroelectricity companies and National Greenhouse and Energy Reporting (NGER) data.

Distributed and reuse water:  WSSS and EWS/EWES/EIS supply estimates set the total. WSSS sets control totals for ANZSIC divisions A, B, C, and D and is distributed based on subdivision ratios produced from the EWS/EWES/EIS and ANZSIC 3-digit division estimates from the REACS and the Agricultural census. EWS/EWES supply and the residual WSSS supply is allocated to other industries. Use by the Water supply, sewerage and drainage services industry is sourced from the WSSS and includes water losses in distribution.

Wastewater: all wastewater use/collection is currently assigned to the Water supply, sewerage and drainage services industry, and data is collected via the WSSS collection. While some other industries are likely treating a small amount of wastewater this would not involve wastewater transferring between institutional units and is therefore, out of scope.

Return flows: represent flows from the economy to the environment; under SEEA conventions (SEEA Water S 3.16) all return flows are attributed to the environment. Data collected via the WSSS, EWS, EWES and EIS.

Water use by industry: sum of self-extracted water, distributed water, wastewater and reuse water use.

Water consumption by industry: water use by industry minus the sum of supply of distributed water, supply of wastewater, supply of reuse water and supply of return flows to the environment. Note that for all industries and households, estimates of the supply of wastewater (usually to the sewerage system) are not available due to difficulties in the disaggregation of collected wastewater volumes by industry and households (wastewater service providers are usually able to provide estimates of total wastewater collected but find it difficult to report the origin of the wastewater, split by industry/households). This leads to an overestimation in water consumption at the industry and households level. This will be rectified in the future when the ABS is able to produce reliable wastewater estimates at industry and households level.

Note: environmental flows are out of scope in this edition of the WAA. Environmental flows relate to (a) statutory requirements to maintain specific water regimes or (b) specific entitlements, which accrue annual allocations of water that can be extracted (or left in-stream) for environmental purposes.

Methods - Monetary supply and use of water

The monetary water supply and use tables are displayed in purchasers’ and current prices. They generally follow the same format as the physical supply and use tables, however, there are a number of key differences, as outlined below:

  • Self-extracted water and return flows are not currently valued as, generally, no volumetric charge is applied and there is a lack of available data. The majority of water that is extracted by the user and has a volumetric charge is included in distributed water in both the physical and monetary supply and use tables.
  • Bulk water, or the supply of water between water suppliers, is valued in the monetary tables. As this is an intra-industry transfer the water flows/transactions are not included in the physical supply and use tables as this would lead to a double-counting of the supply of the water.
  • The monetary supply and use tables also include relevant statistics from the Australian National Accounts, Input-Output Tables. These include import/export values, relevant taxes and subsidies, and social benefits paid in kind.
  • Supply and use balancing is required as discrepancies exist between supply and use totals due to differing compilation techniques and data sources.
     

Monetary supply of water

Self-extracted water: self-extracted water supply is currently not valued in the account.

Distributed water: revenue estimates for the Water supply, sewerage and drainage services industry are the sum of retail revenue received for distributed (potable and non-potable) water. Estimates for industries other than Water supply and sewerage services industry utilise household and industry derived unit values (prices) and the physical volume of distributed water supplied by these industries from the physical supply and use tables.

Reuse water: revenue estimates for the Water supply, sewerage and drainage services industry are the sum of retail revenue received for reuse water. Estimates for industries other than the Water supply, sewerage and drainage services industry utilise industry and household derived unit values (prices) and the physical volume of reuse water supplied by these industries from the physical and supply and use tables.

Bulk water, distributed: supply is the sum of the associated revenue from the WSSS collection. All revenue is allocated to the Water supply, sewerage and drainage services industry.
 
Bulk water, reuse: supply is the sum of the associated revenue from the WSSS collection. All revenue is allocated to the Water supply, sewerage and drainage services industry.

Sewerage wastewater: supply is set by total revenue received from sewerage charges and trade waste charges, as reported in the WSSS collection.

Return flows: currently not valued in the account.

Monetary use of water

Self-extracted water: currently not valued in the account.

Distributed water use for the Mining, Manufacturing, Electricity, Gas and Waste services industries are derived by multiplying the price of water paid by the physical use. The price is derived from data collected on the EWS, EWES and EIS surveys, by dividing expenditure on water by the volume of water used. 

Agricultural distributed water expenditure was calculated using data from the WSSS collection. An agricultural unit price was derived by dividing total revenue received for distributed water by the total volume of distributed water, at a state/territory level, for irrigation units. These unit prices were multiplied by the agricultural use of distributed water estimates from the physical supply and use tables

Household estimates are derived by multiplying a unit price by physical use. The unit price is calculated using the Bureau of Meteorology’s National Performance Reports (NPR) data via the following methodology:

  • The ‘Typical residential bill: water supply’ (data item P3, which includes fixed charges, usage charges and special levies) was multiplied by ‘Number of connected residential properties: water supply’ (data item C2) to derive total residential expenditure at a utility level.
  • Total residential expenditure was then divided by ‘Total volume of water supplied to residential customers’ (data item W8) to derive a unit price ($ per kL) per utility.
  • For all utilities without a unit price available using the above processes, the NPR weighted average unit price by state/territory was used; these unit prices were then multiplied by the total distributed water supply to residential customers for each utility.
  • These were then aggregated to produce state/territory and national level household distributed water expenditure estimates.
  • Note that in some cases data collected on the Water supply and sewerage services (WSSS) collection was used in preference to NPR data due to data quality issues. 

Reuse water: reuse water follows the same methodology as distributed water use.

Bulk water, distributed: expenditure on distributed bulk water mirrors the supply revenue values.

Bulk water, reuse: expenditure on reuse bulk water mirrors the supply revenue values.

Sewerage and drainage services: the EWS, EWES and EIS surveys provide estimates for the Mining, Manufacturing, Electricity, Gas and Waste services industries. For Agriculture and Other industries (ANZSIC Divisions E-S), estimates were available in the 2014-15 EWES and modelled forward using a Gross Value Added index by industry by state/territory. The gap between total supply and total industry use is allocated as household use.

Balancing monetary supply and use of water

Distributed water: total supply is used as the control total, with differences between supply and use allocated to use by Other industries (ANZSIC divisions E-S).

Reuse water: total supply is used as the control total. A weighted balancing approach was used to address discrepancies between the supply control total and use total, with the difference allocated between industries/households in the same proportions as reuse water use before balancing.

Bulk water, distributed: no balancing required.

Bulk water, reuse: no balancing required.

Sewerage and drainage services:  total supply less total industry use is allocated to households' water use.

Methods - Summary Table

The summary tables aim to highlight key indicators of the WAA in a time series, and provide other relevant information linked with data from the supply and use tables. These indicators aim to enhance the ability of users to rapidly synthesise key stories. The data items presented in these tables, and not represented in the supply and use methodology described above, are described below:

  • Total water use by industry: sum of self-extracted water, distributed water and reuse water use by industries.
  • Total water use by industry (less Electricity, gas, water and waste services): sum of total self-extracted water, distributed water and reuse water use by industries, less the sum of total self-extracted water, distributed water and reuse water by the Electricity, gas, water and waste services industries. Note that a majority of the water used by these industries is either supplied to other users or returned to the environment (e.g. hydroelectricity water use). 
  • Total water use by households: sum of total distributed water and reuse water for households (note that self-extracted water use by households, including rainwater tanks and bores, is excluded from this edition of the WAA).
  • Total water use: sum of self-extracted water, distributed water and reuse water use.
  • Total water use less electricity and gas:  sum of total self-extracted water, distributed water and reuse water use, less the sum of total self-extracted water, distributed water and reuse water by the Electricity, gas, water and waste services industries.
  • Gross Value Added (GVA): Chain volume measures; sourced from Australian National Accounts: State Accounts.
  • Estimated population as of 30 June: sourced from Australian Demographic Statistics.
  • Estimated number of households at 30 June: based on a combination of latest estimated resident population; proportion of people living in private dwellings, from Censuses; average household sizes from Censuses; Census household counts; and Post Enumeration Survey household estimates.
  • Total water use (less Electricity, gas, water and waste services) per capita: sum of total self-extracted water, distributed water and reuse water use, less the sum of total self-extracted water, distributed water and reuse water by the Electricity, gas, water and waste services industries divided by the estimated residential population.
  • Total household water use per household: total water use by households (excluding self-extracted water) divided by the number of households.
  • Total water consumption: total self-extracted water use less return flows.
  • Water intensity: total water consumption (ML) divided by industry Gross Value Added ($ million).
  • Water productivity: industry Gross Value Added ($ million) divided by total water consumption (ML).
  • Expenditure per kL of water used by industry, distributed: expenditure on distributed water by industry, divided by total kL of distributed water used by industry.
  • Expenditure per kL of water used by households, distributed: expenditure on distributed water by households, divided by total kL of distributed water used by households.
  • Total expenditure by industry and households per capita, distributed: total expenditure on distributed water by industry and households, divided by the estimated residential population.
  • Total household expenditure per household: total expenditure on distributed water by households, divided by households. 
  • Area-averaged rainfall: data sourced from Bureau of Meteorology, Climate change – trends and extremes
  • Accessible volume in major dam storages as at 30 June: data sourced from Bureau of Meteorology, Water Storage Dashboard
     

Glossary

ANZSIC

The Australian and New Zealand Standard Industrial Classification (ANZSIC) is the standard of classification used in Australia and New Zealand for the collection, compilation, and publication of statistics by industry.

Aquifer

A geologic formation which is capable of holding water and through which water can percolate. Aquifers are capable of yielding quantities of groundwater for economic activities.

Bulk water

Water supplied by a water provider/supplier/utility to another water provider/supplier/utility. Also known as "wholesale" water (as opposed to "retail" water).

Catchment

The area of land determined by topographic features, within which rainfall will contribute to run-off at a particular point. The catchment for a major river and its tributaries is usually referred to as a river basin.

Current prices

Estimates are valued at the prices of the period to which the observation relates. For example, estimates for 2017-18 are valued using 2017-18 prices. This contrasts to chain volume measures where the prices used in valuation refer to the prices of the previous year.

Chain Volume Measures

Annually-reweighted chain Laspeyres volume indexes referenced to the current price values in a chosen reference year (i.e. the year when the quarterly chain volume measures sum to the current price annual values). Chain Laspeyres volume measures are compiled by linking together (compounding) movements in volumes, calculated using the average prices of the previous financial year, and applying the compounded movements to the current price estimates of the reference year.

Distributed water

Water supplied to a user including through a natural (e.g. river) or non-natural network (e.g. piped or open channel), and where an economic transaction has occurred for the exchange of this water. The majority of distributed water is supplied by the Water supply, sewerage and drainage services industry (ANZSIC Division 28). The water supply component consists of units mainly engaged in storage, purification or distribution of water by pipeline or carrier. It may also include the operation of irrigation systems that supply water to a farm and the supply of steam and hot water. Distributed water can include potable, mains and raw water but does not include reuse or bulk water.

Economic unit

A unit (e.g. business or organisation) that engages in production and/or consumption activities.

Exports

Exports of goods and services consist of sales, barter, or gifts or grants, of goods and services from residents to non-residents.

Gigalitre (GL)

One thousand million litres, or 1,000,000,000 litres. 1 Gigalitre = 1,000,000 cubic metres.

Gross Value

The gross value of commodities produced. It is the value placed on recorded production at the wholesale prices realised in the market place.

Gross water supply

Water supplied to other water providers and customers, plus losses, own use by water providers and environmental flows.

Groundwater

Water which collects in porous layers of underground formations known as aquifers.

Industry Gross Value Added (IGVA)

The value of an industry's output at basic prices, minus the value of goods and services consumed as inputs during the process of production. Basic prices valuation of output removes the distortion caused by variations in commodity taxes and subsidies across the output of individual industries.

Imports

Imports of goods and services consist of sales, barter, or gifts or grants, of goods and services from non-residents to residents.

Irrigation water

Water artificially applied to soils (i.e. does not include precipitation/rainfall).

Kilolitre (kL)

One thousand litres (1,000 litres). 1 kilolitre = 1 cubic metre.

Megalitre (ML)

One million litres (1,000,000 litres). 1 megalitre = 1,000 cubic metres.

Other industries

In the physical water supply and use tables, "Other industries" refers to the following list of industries, according to the Australian and New Zealand Standard Industrial Classification (ANZSIC):

  • Construction 
  • Wholesale trade 
  • Retail trade 
  • Accommodation and food services 
  • Transport, postal and warehousing 
  • Information media and telecommunications 
  • Financial and insurance services 
  • Rental, hiring and real estate services 
  • Professional, scientific and technical services 
  • Administrative and support services 
  • Public administration and safety 
  • Education and training 
  • Health care and social assistance 
  • Arts and recreation services 
  • Other services.

Other water provider

An organisation that supplies water but whose main activity is in an industry other than the Water supply, sewerage and drainage services industry (e.g. Mining or Manufacturing).

Potable water

Water that is suitable for human consumption (i.e. drinking water).

Purchasers’ price

The amount paid by the purchaser, excluding any tax deductible by the purchaser, in order to take delivery of a unit of a good or service at the time and place required by the purchaser. The purchaser’s price of a good includes any transport charges paid separately by the purchaser to take delivery at the required time and place.

Raw water

Water extracted from the environment that has not been treated.

Retail water

Potable or non-potable water supplied by a water supplier to customers not classified as water suppliers.

Return flows

Return flows represent the flows of water from industries and households to the environment. This excludes flows of water from industries and households to wastewater treatment facilities but includes flows of water from treatment facilities directly to the environment. The SEEA records this as use by the environment.

Reuse water

Wastewater (including sewage) that is collected, on-supplied and used again by other businesses/households. It may have been treated to some extent. Reuse water is also known as recycled water or effluent re-use. Recycling within industrial sites (also known as “on-site recycling) is excluded.

Revenue - sewerage and wastewater services

Revenue from 'pay for use' and base rate charges (i.e. volumetric and fixed rates) for the provision of wastewater. It also includes revenue generated from trade waste charges.

Revenue - water supply

Revenue from the provision of water supply services to residential and non-residential properties. Also includes revenue generated from bulk supply or bulk sale of potable and non-potable/raw water, treated wastewater or reuse water and desalinated water.

Sea water for desalination

A process where salt is removed from water with a high salt content (usually sea water but sometimes other brackish water) to make it suitable for domestic or industrial use.

Self-extracted water

Water extracted directly from the environment for use (including surface water, groundwater and other bodies) for the purpose of supplying to others (including other water suppliers) and/or for own use. It also includes water produced from salt water desalination.

Sewerage

Infrastructure (e.g. pipe and drains) used to transport sewage or domestic wastewater.

Social benefits paid in kind

Social transfers in kind consist of good and services provided to households by government and private, non-market producers free or at prices that are not economically significant.

Subsidies

Current unrequited payments that government units, including non-resident government units, make to enterprises based on the levels of their production activities or quantities or values of the goods or services that they produce.

Supply Use framework

Physical water supply and use tables which provide information on the volumes of water extracted, supplied within the economy and discharged back into the environment by economic activity and households.

Surface water

Water on the surface of continents such as in a river, lake, wetland, ice or snow. This excludes sea water.

System of Environmental-Economic Accounting (SEEA)

A framework used to develop environmental accounts by integrating environmental information into an accounting framework. The primary manual is the SEEA Central Framework (SEEA-CF) which provides the conceptual basis for describing the interrelationship between the natural environment and the economy.

System for Environmental-Economic Accounting - Water (SEEA-Water)

An elaboration of the SEEA framework which provides a conceptual framework for organising hydrological and economic information in a coherent and consistent framework. It is consistent with SEEA-CF.

System of National Accounts (SNA)

An international framework which can be used to develop a comprehensive, consistent and flexible set of macro-economic accounts. The latest edition is the 2008 SNA.

Taxes

Compulsory, unrequited payments, in cash or in kind, made by institutional units to government units.

Wastewater

Any water that has been used by an economic unit or household, and then transferred between economic units, usually for treatment. The most commonly understood form of wastewater is sewage; however, non-sewage wastewater products are also included (for example, untreated effluent and trade waste).

Water consumption

The amount of water that is extracted from the environment by the economy (industries and households) for use, which is not distributed to other economic units nor returned to an inland water resource (e.g. river, dam, lake, creek), because during use it has been incorporated into products, evaporated, transpired by plants, or consumed by households or livestock. It may include losses due to evaporation occurring in distribution and apparent losses due to illegal tapping as well as malfunctioning metering.

Water intensity and productivity

Water intensity is referred to as the ratio of physical flow to an economic aggregate (for example, ML/$m GVA) while water productivity represents the ratio of economic aggregate to physical flow (for example, $m GVA/ML). Water intensity is the inverse of water productivity.

Water losses

Water that enters the water distribution system of a water provider but does not reach the end users/customers. Water losses can be attributed to seepage, leakage, evaporation (excluding evaporation from water storages), meter inaccuracies and theft.

Water provider

A business or organisation that provides a reticulated water supply, irrigation water, reuse/recycle water and/or bulk water supply service. Water providers may be government or private and often operate water storage, purification and supply services. They may also provide sewerage or drainage services. Commonly referred to as a water utility or water supplier.

Water supply

Water leaving/flowing out from an economic unit. Water supply is the sum of water supply to other economic units (distributed water, reuse water and wastewater) and water supply to the environment (return flows).

Water supply services

The provision of reticulated water supply (including desalinated water), irrigation water, recycled (reuse) water, bulk and/or retail water supply service.

Water use

Water intake by an economic unit, or the economy. Water use is the sum of the amount of water extracted from the environment (including surface water, groundwater and sea water for desalination) for use in the economy, plus water use within the economy (i.e. distributed water use, reuse water use and wastewater collection). Note that the direct use of precipitation on to land, which leads to the use of the water held in soil by plants (e.g. rainfed agriculture), is outside of the scope of this publication and is not included.

Abbreviations

$dollar
$bbillion dollars
$mmillion dollars
%per cent
ABSAustralian Bureau of Statistics 
ACTAustralian Capital Territory 
ANZSICAustralian and New Zealand Standard Industrial Classification (2006 edition)
ASGSAustralian Statistical Geography Standard
Aust.Australia
BoMBureau of Meteorology (Commonwealth)
cat.catalogue
EISEnvironmental Indicators Survey
EVAOEstimated Value of Agricultural Operations
EWESEnergy, Water and Environment Survey 
GLgigalitre
GVGross Value
GVAGross Value added
GVIAPGross Value of Irrigated Agricultural Production
IGVAIndustry Gross Value Added
kLkilolitre 
MLmegalitre
mmmillimetre
nanot available
no.number
npnot available for publication
NSW New South Wales
NTNorthern Territory
QldQueensland
REACS Rural Environment and Agricultural Commodities Survey 
SASouth Australia
SEEASystem of Environmental Economic Accounting 
SEEA-Water System of Environmental Economic Accounting for Water
SNASystem of National Accounts 
Tas.Tasmania
UNUnited Nations
VACPValue of Agricultural Commodities Produced
Vic.Victoria
WAWestern Australia
WAAWater Account, Australia
WSSSWater Supply and Sewerage Services Survey
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