Table 3-3: Water Quality Performance Indicators

from Strategic business plan for delivery of water services

by MidCoastCouncil

Appendix A - Requirements under the Acts

Residual head required for Peak Instantaneous Demand (PID) is greater than 120 kPa.

Desirable residual pressures between 300 kPa and 600 kPa.

The maximum acceptable head (under static conditions) is 900 kPa.

Duration, Frequency and Severity of Drought Water Restrictions

MidCoast Water Services’ long term objective is to ensure that the total time spent in drought restrictions;

 should be no more than 5% of the time  restrictions should not be applied in more than 10% of the years, and  when restrictions are applied the water supply system should be sized for a 10% reduction in demand

This methodology approximates the severity of a “1 in 1,000 year” drought and is known as the 5/10/10 design rule.

Peak Daily Demand/Capacity

For existing development, the residual head provided for Peak Day Demand is > 210 kPa.

For new development the residual head provided for Peak Day Demand is > 250 kPa.

Residual head provided for Peak Instantaneous Demand is > 120 kPa.

Water Quality

MidCoast Water Services’ objective is to provide drinking water that achieves 100% compliance to targets within the Australian Drinking Water Guidelines (ADWG).