14 ATTACHMENT 1 EXHIBIT A - Laserfiche WebLink

A This chapter describes and quantifies the City's historical, current, and projected water uses. Water use projections are provided in five-year increments to the year 2045, as well as on a yearly basis for the next five years (2021-2025). This chapter also presents the City's water losses for the previous five years, projects future water use for lower income households, and discusses the impact of climate change on water use. 4.1 NON -POTABLE VERSUS POTABLE WATER USE The City currently provides both potable water and recycled water to customers within its service area. Potable water is water that is safe to drink and typically has had various levels of treatment and disinfection. The City receives its potable water supply from two sources: purchases from Zone 7 and groundwater pumped from City wells. Non -potable water is not intended for consumption and includes both recycled water and raw water. Raw water is untreated water that is used in its natural state or with minimal treatment. However, the City does not deliver raw water to any customers in its service area. Recycled water is municipal wastewater that has been treated to a specified quality that allows for re -use. The City receives recycled water from Livermore and through the San Ramon Valley Recycled Water Program (SRVRWP), which is operated by a joint powers authority between DSRSD and the East Bay Municipal Utility District (EBMUD) called the DSRSD-EBMUD Recycled Water Authority (DERWA). Both the SRVRWP and the Livermore Water Reclamation Plant (LWRP) provide recycled water to landscape irrigation customers that meets Title 22 disinfected tertiary recycled water requirements. The City's water supplies are described further in Chapter 6. 4.2 WATER USE BY SECTOR This section describes the City's past, current, and projected water use by sector through the year 2045 in five-year increments. Water demand projections are based on Zone 7's Regional Demand Study and retailer delivery requests and provide the basis for sizing and staging future water facilities to ensure adequate supply. This section identifies the water usage among water use sectors including single family residential, multi -family residential, commercial, industrial, institutional/governmental, landscape irrigation, agricultural, and others. These classifications were used to analyze current consumption patterns among various types of customers. The City uses the same definitions for each sector as outlined in the DWR Guidebook: • Single -Family Residential: A single-family dwelling unit. A lot with a free-standing building containing one dwelling unit that may include an attached or detached secondary dwelling. • Multi -Family Residential: Multiple dwelling units contained within one building or several buildings within one complex. • Commercial: A water user that provides or distributes a product or service (CWC 10608.12(d)). • Industrial: A water user that is primarily a manufacturer or processor of materials as defined by the North American Industry Classification System (NAICS) code sectors 31 to 33, inclusive, or an entity that is a water user primarily engaged in research and development (CWC 10608.12(h)). WEST YOST 4-1 City of Pleasanton 2020 Urban Water Management Plan May 2021