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August 2016
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City of Morgan Hill
2015 Urban Water Management Plan
4.2.3
Maximum Day Demand
Maximum Day Demand is a significant demand condition on the water supply system. This
condition is defined as the maximum 24-hour use period in the year. Peaking factors are
commonly used as a way of simulating the maximum day demand for future demand scenarios.
This multiplier is assessed to the average day demand, and is commonly in the order of 2 to 2.5
times greater than the average day demand. The January 2002 City Water System Master Plan
specified a maximum day demand peaking factor of 2.0. The Water System Master Plan is
currently being updated. It is not anticipated that the maximum day peaking factor will change as a
result of the update.
4.3 DISTRIBUTIONS SYSTEM WATER LOSSES
Law
As part of the 2015 UWMP update urban water suppliers are required to quantify their distribution
system water losses in a manner consistent with the American Water Works Association (AWWA)
water system balance methodology. The City has completed the required water loss audit
worksheet in accordance with the DWR guidelines and the projected losses are summarized in
Table 4-4
. The city-wide distribution system losses identified using the AWWA water system
balance methodology for the 2015 UWMP were determined to be 420 AF.
Table 4-4 12 Month Water Loss Audit Reporting
Reporting Period Start Date
Volume of Water Loss
(AF)
January 2015
420
10631 (e)(1) Quantify to the extent records are available, past and current water use over
the same five-year increments described in subdivision (a), and projected
water use, identifying the uses among water use sectors, including, but not
necessarily limited to, all of the following uses:
(J) Distribution system water loss
(3)(A) For the 2015 urban water management plan updated, the distribution system
water loss shall be quantified for the most recent 12-month period available.
For all subsequent updates, the distribution system water loss shall be
quantified for each of the five years preceding the plan update.
(B) The distribution system water loss quantification shall be reported in
accordance with a worksheet approved or developed by the department
through a public process. The water loss quantification worksheet shall be
based on the water system balance methodology developed by the American
Water Works Association.