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7. B. - Page 8 Executive Summary 1! GlIY qW `wflj(RG 9 6 e WJft LCr&d The total water use figure includes potable water offsets to account for growth in the City's recycled water use, reductions in potable use due to water efficiency standards, and growth in water conservation. Recycled water demand is projected to increase to 1,611 AFY by 2030. To date, Phase 1 of the City's recycled water project has been implemented, and includes customers east of Hwy 101 in Redwood Shores, the Bayfront Area and the Seaport Area. Phase 2 is expected to include customers west of Hwy 101. Of the current and projected recycled water use by 2030, approximately 600 AFY is estimated to be used by existing customers, just under 300 AFY of new use is projected in the Phase 1 area, and the remaining 700 AFY of new use is in the Phase 2 area. a Projected demands include 430 AFY in anticipated reductions in potable water use due to water efficiency standards that offset potable water use. This offset factors in the ongoing replacement of less water - efficient water fixtures with more efficient water fixtures, such as use of low -flow toilets and high efficiency washing machines. Projected demands also include 730 AFY of future water conservation savings. Savings is projected to come from new single family residential programs for improved leak detection, and water - budget based water rates. Both of these reductions in use are assumed to occur throughout the service area. ESA EXISTING WATER SYSTEM OVERVIEW (CHAPTER 3) The City's potable water service area includes the incorporated limits of the City, portions of San Mateo County outside the corporate limits, including Canada College and the Emerald Lake Hills areas, and parts of the Town of Woodside and the City of San Carlos. The City's service area is approximately 17 square miles, and includes 20 pressure zones. The sole source of supply for the system is from the City of San Francisco Regional Water System, delivered to various areas of the City through 13 turnouts. The system can be described by three distinct areas: • Main City Zone — Includes the Downtown, Seaport and central residential neighborhoods within the City that are adjacent to San Francisco Bay. This zone accounts for approximately 60 percent of the City's demand and is served by gravity from the San Francisco Public Utilities Commission ( SFPUC) regional system. • Redwood Shores Zone — This master planned area to the north of the City includes a mix of low and medium density residential uses, along with office and commercial years. This area accounts for about 15 percent of system demand is served by gravity from the SFPUC regional system. • Hillside Area — Areas on the west side of the City, at higher elevations. This area is generally low density single family residential with some neighborhood commercial areas. The Hillside Area accounts for about 25 percent of system demand and is primarily served by pump stations that supply the area from the SFPUC regional system. '" City of Redwood City 2010 Urban Water Management Plan (Redwood City, adopted June 13, 2011), Table 4 -8. WEST Y O S T ASSOCIATES ES -4 City of Redwood City September 2011 Water System Master Plan o\c\369\06-09-01 \wp\mp\05261 0_0ES