Urban Water Management Plan 2015

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 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. 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

Volume of Water Loss (AF)

Reporting Period Start Date

January 2015

420

August 2016

4-5

City of Morgan Hill 2015 Urban Water Management Plan