Eurobodalla Integrated Water Cycle Management Strategy

46
Annual Volume (ML/Yr)
2,500
2,000
1,500
1,000
500
Eurobodalla Integrated Water Cycle Management Strategy
0
1990 1992 1994 1996 1998 2000 2002
Year
Permanent Houses Holiday Houses
Figure 6-11 Historic Residential Demands
Records show that non-metered consumption supplied through the regional scheme
equates to an additional 16% (approximate) to the annual consumption. The reported
system loss rates are high in comparison to other NSW town water supply systems (DLWC
Performance Comparisons 2001)
Figure 6-10 shows that the industrial demand supplied by the regional scheme is small. Any
increase in future industrial water demand needs to be fulfilled by acquiring new
entitlements in the market and/or by accommodating growing industrial water needs within
the existing town water entitlements (see Water Management Act in section 6.1.1 for further
details).
Urban Water Discharge
Urban wastewater has increased with population growth and currently stands at
approximately 4 500 ML/a. Approximately 85% (3 820 ML/a) of wastewater produced in the
urban areas of Eurobodalla receives secondary treatment at one of the Council’s five
sewage treatment plants. Of the total secondary treated effluent, approximately 13%
(500 ML/a) is beneficially reused for irrigation at local golf courses and playing fields. The
remaining effluent is discharged to the ocean. On-site systems account for the remaining
15% of urban wastewater not treated at an STP.
The secondary treated effluent from four of the five plants undergoes passive or natural
disinfection prior to discharge. The effluent from the Moruya plant is artificially disinfected
using an ultraviolet irradiation plant before being discharged to the environment. The daily
average wastewater treated by the five plants is approximately 8 ML/d, and this volume
increases by approximately 20% during the peak holiday/tourist season.
Wastewater from the villages of Nelligen, South Durras, Congo, Mystery Bay, Rosedale,
Guerilla Bay, Bodalla, Potato Point, Central Tilba, Moruya Head, Turlinjah, Tilba Tilba and
Akolele receives minimal treatment through on-site systems. This system of wastewater
treatment represents a substantial risk to the local environment and the public health of the
community. Council is currently implementing measures to improve the quality of the
wastewater produced from Moruya Head, Turlinjah and Bodalla villages. Wastewater issues
relating to each town and village are discussed in more detail in part C.
The discharge of stormwater from the urban areas has also been increasing steadily with
population growth and the expansion of the urban footprint. At present approximately,