DEECA Victorian Water Accounts 2023-24

About the area

South East Water is one of Melbourne’s three retail water corporations. It obtains treated bulk water from Melbourne Water and operates a single, integrated water supply system covering south-east Melbourne, the Mornington Peninsula and part of South Gippsland.

More information on the water corporation can be found at South East Water.

2023-24 overview

Urban deliveries

155,805 ML of urban residential and non-residential deliveries were made in 2023-24, similar to the previous year (150,949 ML).

Wastewater recycled at treatment plants

26% of wastewater was recycled (3,810 ML of 14,937 ML), similar to 18% in 2022-23.

Water deliveries

Urban systems

South East Water operates one urban water supply system. Water is sourced from the Bunyip, Goulburn, Thomson and Yarra basins.

Table 1: Urban system water balance, South East Water

Area / town / system	Total inflows (ML)	Outflows (ML)	End volume in store (ML)
South East Water ¹	171,215	107,981	47,824	15,410	171,215	91%
Total 2023-24	171,215	107,981	47,824	15,410	171,215
Total 2022-23	166,555	104,130	46,819	15,606	166,555

Area / town / system	Total inflows (ML)	Outflows (ML)	End volume in store (ML)
South East Water ¹	171,215	107,981	47,824	15,410	171,215	91%
Total 2023-24	171,215	107,981	47,824	15,410	171,215
Total 2022-23	166,555	104,130	46,819	15,606	166,555

Recycled water

Water recycled at wastewater treatment plants can be used to supplement water available in river basins. Table 2 lists the wastewater treatment plants managed by South East Water. Water discharged to the environment from treatment plants is included as an inflow to the water balance for each of the river basins.

More information can be found in How we account for water supply.

Table 2: Treated wastewater produced and recycled, South East Water

Wastewater treatment plant	Class of water	Inflows to plant (ML)	Recycled water end use (ML)	Total water recycled (ML)
Blind Bight treatment plant	C	182	0	182	0	0	0	0	178	4	182	100%	0	0	0	0
Somers treatment plant ¹	A,C	1,952	0	1,952	0	0	1	225	41	256	524	27%	0	89	0	1,340
Kooweerup treatment plant	C	60	0	60	0	0	0	0	13	0	13	22%	47	0	0	0
Lang Lang treatment plant	A,C	315	0	315	0	0	190	0	36	11	237	75%	0	0	78	0
Longwarry treatment plant	C	488	0	488	0	0	0	0	96	0	96	20%	0	0	392	0
Mt Martha treatment plant ²	A,C	5,077	1,339	6,416	0	0	0	0	42	942	983	15%	8	5,424	0	0
Pakenham treatment plant	A,C	742	0	742	185	11	12	0	394	140	742	100%	0	0	0	0
Boneo treatment plant	A,C	4,782	0	4,782	0	2	45	0	674	312	1,033	22%	0	3,749	0	0
Total 2023-24		13,598	1,339	14,937	185	13	248	225	1,474	1,665	3,810	26%	55	9,262	470	1,340
Total 2022-23		14,943	1,758	16,702	238	0	211	196	984	1,339	2,967	18%	0	11,091	453	2,191

Wastewater treatment plant	Class of water	Inflows to plant (ML)	Recycled water end use (ML)	Total water recycled (ML)
Blind Bight treatment plant	C	182	0	182	0	0	0	0	178	4	182	100%	0	0	0	0
Somers treatment plant ¹	A,C	1,952	0	1,952	0	0	1	225	41	256	524	27%	0	89	0	1,340
Kooweerup treatment plant	C	60	0	60	0	0	0	0	13	0	13	22%	47	0	0	0
Lang Lang treatment plant	A,C	315	0	315	0	0	190	0	36	11	237	75%	0	0	78	0
Longwarry treatment plant	C	488	0	488	0	0	0	0	96	0	96	20%	0	0	392	0
Mt Martha treatment plant ²	A,C	5,077	1,339	6,416	0	0	0	0	42	942	983	15%	8	5,424	0	0
Pakenham treatment plant	A,C	742	0	742	185	11	12	0	394	140	742	100%	0	0	0	0
Boneo treatment plant	A,C	4,782	0	4,782	0	2	45	0	674	312	1,033	22%	0	3,749	0	0
Total 2023-24		13,598	1,339	14,937	185	13	248	225	1,474	1,665	3,810	26%	55	9,262	470	1,340
Total 2022-23		14,943	1,758	16,702	238	0	211	196	984	1,339	2,967	18%	0	11,091	453	2,191

Nearby water corporations

Westernport Water

Explore the Westernport Water Corporation local report.

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Yarra Valley Water

Explore the Yarra Valley Water Corporation local report.

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South East Water

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In this area

About the area

2023-24 overview

Urban deliveries

Wastewater recycled at treatment plants

Water deliveries

Urban systems

Table 1: Urban system water balance, South East Water

Recycled water

Table 2: Treated wastewater produced and recycled, South East Water

Nearby water corporations

Westernport Water

Yarra Valley Water

Back to water supply map

Victorian Water Accounts

Wastewater treatment plant	Class of water	Inflows to plant (ML)			Recycled water end use (ML)								Total water recycled (ML)		Discharge (ML)
Wastewater treatment plant	Class of water	Volume treated wastewater produced	Other inflow	Total inflow	Volume supplied to retailers	Domestic / residential	Municipal	Commercial	Industrial	Agriculture	Beneficial allocation	Within process	Total volume recycled	Total % recycled	Released to land	Ocean outfall discharge	Inland water discharge	Other outflow
Blind Bight treatment plant	C	182	0	182	0	0	0	0	0	178	0	4	182	100%	0	0	0	0
Somers treatment plant ¹	A,C	1,952	0	1,952	0	0	0	1	225	41	0	256	524	27%	0	89	0	1,340
Kooweerup treatment plant	C	60	0	60	0	0	0	0	0	13	0	0	13	22%	47	0	0	0
Lang Lang treatment plant	A,C	315	0	315	0	0	0	190	0	36	0	11	237	75%	0	0	78	0
Longwarry treatment plant	C	488	0	488	0	0	0	0	0	96	0	0	96	20%	0	0	392	0
Mt Martha treatment plant ²	A,C	5,077	1,339	6,416	0	0	0	0	0	42	0	942	983	15%	8	5,424	0	0
Pakenham treatment plant	A,C	742	0	742	0	185	11	12	0	394	0	140	742	100%	0	0	0	0
Boneo treatment plant	A,C	4,782	0	4,782	0	0	2	45	0	674	0	312	1,033	22%	0	3,749	0	0
Total 2023-24		13,598	1,339	14,937	0	185	13	248	225	1,474	0	1,665	3,810	26%	55	9,262	470	1,340
Total 2022-23		14,943	1,758	16,702	0	238	0	211	196	984	0	1,339	2,967	18%	0	11,091	453	2,191