Eugene Water

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Eugene Water Electric Board
Jill Hoyenga, Water Management Services Supervisor
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Eugene Water Electric Board
Water Budget A Key Customer Education Tool
PNWS-AWWA Annual Conference Pre-Conference
Seminar April 30, 2008
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Definition of a Water Budget

• An estimate of how much water a customer should
  use
• Most useful when compared to the customers
  actual use
• Also called a water allocation

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Outdoor Water Budget

• Most common type of water budget
• Example of irrigation demand calculation
• Water one inch deep on 1000 sqft area equals 623
  (624) gallons (134 cubic feet of water)
• Percent of ET demand expressed as inches per time
  period (day, week, month)
• Square footage of watered area

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Indoor Water Budget Residential

• Uses AWWARF Residential End Use Study or local
  equivalent
• Example of indoor fixture calculation
• Inventory fixture count and usage
• Multiply by number of units
• Occupancy rates may vary per unit so a high/low
  range is most useful for multi-family
• Be aware of multiple meters for multi-family

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Indoor Water Budget CII

• Might use AWWARF Commercial End Use Study or
  local equivalent
• Example of indoor fixture calculation
• Inventory fixture count by type
• Divide total use per day by number of employees
• A high/low estimate is most useful
• Seasonal, production, and other changes make
  these estimates very difficult

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Uses of a Water Budget

• Customer Education
• Sorting tool for program participation
• Infrastructure planning and design
• SDC calculations
• System-wide differentiation of beneficial and
  non-beneficial use
• Building a rate case
• Curtailment planning

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Water Budget forCustomer Education

• Outdoor water use education
• Leak detection
• Retrofit comparisons
• Education foundation for possible water budget
  based water rates or curtailment

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Water Budget as aSorting Tool

• Customer soliciting services that may not be
  needed
• Water budget selection for potential program
  participants
• Outdoor water conservation programs
• Identify cooling load customers

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Water Budget forInfrastructure Planning

• Meter sizing and SDC charges
• Irrigation demand for individual service
• Reservoir and main sizing
• Avoid irrigation demand using up fire-flow
  capacity

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System-wide use of Water Budgets

• Differentiate between beneficial and
  non-beneficial use (particularly outdoor water
  use)
• Water budget by sector or customer class
• More accurately assess the revenue impact of a
  successful conservation program
• Build a case for water budget water rates
• Build a water budget based curtailment plan

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Questions? Jill Hoyenga 541-984-4706 jill.hoyenga_at_
eweb.eugene.or.us