❓ A WA parliamentary question seeks detailed water consumption data for the Perth/Peel region over the past 10 years, broken down by volume, sector (residential/industrial), major industrial users, and water sources. The answer provides tables with the requested data, including scheme and self-supplied water.
AnsweredQoN 2801Legislative Council
QuestionView source ↗
I refer to the issue of water consumption in the
Perth/Peel region, and I ask: (a) what
were the total volumes of water servicing the Perth/Peel regions as split out
by year for each of the past 10 full reporting years; (b) for each of the past 10 full reporting years, what percentage of these volumes were for: (i) residential use; and (ii) industrial use; (c) for
each of the past 10 full reporting years, what was the water consumption by
volume for each of the 10 largest single industrial users of water in the
Perth/Peel regions; and (d) what have been the water sources, by volume, and
location, for the Perth/Peel region for each of the last 10 reporting years?
Perth/Peel region, and I ask: (a) what
were the total volumes of water servicing the Perth/Peel regions as split out
by year for each of the past 10 full reporting years; (b) for each of the past 10 full reporting years, what percentage of these volumes were for: (i) residential use; and (ii) industrial use; (c) for
each of the past 10 full reporting years, what was the water consumption by
volume for each of the 10 largest single industrial users of water in the
Perth/Peel regions; and (d) what have been the water sources, by volume, and
location, for the Perth/Peel region for each of the last 10 reporting years?
AnswerView source ↗
Answered
12 May 2020
Responded by
Minister for Regional Development representing the Minister for Water
Response time
15 days
(a) The total volume of water supplied in the Perth and Peel region (Table 1) includes potable scheme water supplied by the Water Corporation and water self-supplied from groundwater and surface water resources by individuals, industries and local government using their own water supply infrastructure.
Table 1: Total estimated water use in the Perth and Peel regions (Greater Perth)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Total water supplied (GL)
553.3
555.3
558.5
556.6
573.9
577.4
575.9
574.7
576.5
580.7
(b)(i)(ii) Residential and industrial water use in the Perth and Peel Region (Greater Perth) (Table 2) includes both scheme water and water self-supplied from surface water and groundwater resources.
Table 2: Residential and industrial water use in the Perth and Peel region (Greater Perth)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Estimated total residential (%)
49%
49%
47%
48%
49%
48%
49%
48%
48%
48%
Estimated total industrial (%)
9%
9%
9%
9%
9%
9%
9%
9%
9%
9%
(c) Industrial water users may source water from scheme and/or self-supplied water sources. Table 3 lists the water consumption by volume of the top ten industrial consumers of both Water Corporation scheme water (“Customers”) and groundwater or surface water (“Licensees”) that take water under the Rights in Water and Irrigation Act 1914 .
Table 3: Annual water consumption by volume for each of the 10 largest single industrial users of water in the Perth and Peel regions in gigalitres (GL)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Licensee 1
12.8
13.8
14.8
15.9
14.2
11.7
12.5
13.5
15.4
-
Licensee 2
7.6
7.7
7.3
7.7
7.1
6.4
6.8
6.6
5.9
9.0
Customer 1
2.4
2.8
2.8
2.7
2.8
2.9
3.0
2.9
2.3
2.8
Licensee 3
2.2
2.5
2.0
2.1
2.3
2.4
2.3
2.4
2.7
2.5
Customer 2
2.1
2.4
2.5
1.8
2.2
2.4
2.2
2.6
2.4
2.5
Customer 3
2.2
2.0
2.3
2.1
2.0
2.0
2.5
2.3
2.0
2.2
Customer 4
1.3
1.3
1.3
1.3
1.4
1.4
1.5
1.5
1.3
1.3
Licensee 4
1.0
1.0
1.0
1.0
1.1
1.1
1.1
1.0
1.0
-
Licensee 5
1.2
1.1
1.6
1.3
0.9
0.7
0.3
0.6
0.7
0.5
Customer 5
0.6
0.6
0.6
0.7
0.7
0.7
0.8
1.1
1.1
1.1
Note that the ‘-’ entry in the 2019 column of Table 3 denotes that metered water use for the particular industrial water user has not yet been recorded by the Department of Water and Environmental Regulation.
(d) The volume of water supplied by source (Table 4) incudes water sourced in the Perth and Peel region and exported to the Goldfields and Agricultural Region Water Supply Scheme and parts of the South West. The source locations other than for the Water Corporation Integrated Water Supply Scheme desalination plants are numerous and include all dams, bores and other water sources.
Table 4: Water sources in the Perth and Peel region (Greater Perth), gigalitres (GL)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Groundwater
(non-potable)
280.1
284.5
286.1
279.5
283.3
290.5
286.2
295.0
300.8
298.6
Groundwater (potable)
120.8
164.8
158.8
140.2
125.8
124.0
137.4
147.5
126.9
123.4
Southern Seawater Desalination Plant
0
0
29.0
48.4
65.1
73.1
92.9
102.5
102.9
50.3
Perth Desalination Plant
47.7
52.0
49.0
47.7
48.0
46.4
46.2
47.3
46.0
39
Surface water (potable)
90.7
48.8
34.4
36.6
49.0
47.5
20.0
0.5
15.8
72.2
Surface water
(non-potable)
9.8
9.5
8.7
9.1
10.0
8.0
7.0
5.5
6.3
9.2
Wastewater recycling (potable)
0
0
0
0
0
0
1.2
1.0
6.0
0.1
Wastewater recycling (non-potable)
5.5
5.7
7.6
7.5
7.9
7.7
8.0
7.6
7.2
7.4
Total
554.6
565.3
573.6
569
589.1
597.2
598.9
606.9
611.9
600.2
Table 1: Total estimated water use in the Perth and Peel regions (Greater Perth)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Total water supplied (GL)
553.3
555.3
558.5
556.6
573.9
577.4
575.9
574.7
576.5
580.7
(b)(i)(ii) Residential and industrial water use in the Perth and Peel Region (Greater Perth) (Table 2) includes both scheme water and water self-supplied from surface water and groundwater resources.
Table 2: Residential and industrial water use in the Perth and Peel region (Greater Perth)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Estimated total residential (%)
49%
49%
47%
48%
49%
48%
49%
48%
48%
48%
Estimated total industrial (%)
9%
9%
9%
9%
9%
9%
9%
9%
9%
9%
(c) Industrial water users may source water from scheme and/or self-supplied water sources. Table 3 lists the water consumption by volume of the top ten industrial consumers of both Water Corporation scheme water (“Customers”) and groundwater or surface water (“Licensees”) that take water under the Rights in Water and Irrigation Act 1914 .
Table 3: Annual water consumption by volume for each of the 10 largest single industrial users of water in the Perth and Peel regions in gigalitres (GL)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Licensee 1
12.8
13.8
14.8
15.9
14.2
11.7
12.5
13.5
15.4
-
Licensee 2
7.6
7.7
7.3
7.7
7.1
6.4
6.8
6.6
5.9
9.0
Customer 1
2.4
2.8
2.8
2.7
2.8
2.9
3.0
2.9
2.3
2.8
Licensee 3
2.2
2.5
2.0
2.1
2.3
2.4
2.3
2.4
2.7
2.5
Customer 2
2.1
2.4
2.5
1.8
2.2
2.4
2.2
2.6
2.4
2.5
Customer 3
2.2
2.0
2.3
2.1
2.0
2.0
2.5
2.3
2.0
2.2
Customer 4
1.3
1.3
1.3
1.3
1.4
1.4
1.5
1.5
1.3
1.3
Licensee 4
1.0
1.0
1.0
1.0
1.1
1.1
1.1
1.0
1.0
-
Licensee 5
1.2
1.1
1.6
1.3
0.9
0.7
0.3
0.6
0.7
0.5
Customer 5
0.6
0.6
0.6
0.7
0.7
0.7
0.8
1.1
1.1
1.1
Note that the ‘-’ entry in the 2019 column of Table 3 denotes that metered water use for the particular industrial water user has not yet been recorded by the Department of Water and Environmental Regulation.
(d) The volume of water supplied by source (Table 4) incudes water sourced in the Perth and Peel region and exported to the Goldfields and Agricultural Region Water Supply Scheme and parts of the South West. The source locations other than for the Water Corporation Integrated Water Supply Scheme desalination plants are numerous and include all dams, bores and other water sources.
Table 4: Water sources in the Perth and Peel region (Greater Perth), gigalitres (GL)
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
Groundwater
(non-potable)
280.1
284.5
286.1
279.5
283.3
290.5
286.2
295.0
300.8
298.6
Groundwater (potable)
120.8
164.8
158.8
140.2
125.8
124.0
137.4
147.5
126.9
123.4
Southern Seawater Desalination Plant
0
0
29.0
48.4
65.1
73.1
92.9
102.5
102.9
50.3
Perth Desalination Plant
47.7
52.0
49.0
47.7
48.0
46.4
46.2
47.3
46.0
39
Surface water (potable)
90.7
48.8
34.4
36.6
49.0
47.5
20.0
0.5
15.8
72.2
Surface water
(non-potable)
9.8
9.5
8.7
9.1
10.0
8.0
7.0
5.5
6.3
9.2
Wastewater recycling (potable)
0
0
0
0
0
0
1.2
1.0
6.0
0.1
Wastewater recycling (non-potable)
5.5
5.7
7.6
7.5
7.9
7.7
8.0
7.6
7.2
7.4
Total
554.6
565.3
573.6
569
589.1
597.2
598.9
606.9
611.9
600.2
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