1. Director Jerry Werner March 26, 2010
El toro water district Proposed Water Budget based tiered conservation Rate structure
Tv-6 presentation
Director Jerry Werner
March 26, 2010

2. WHY NOW? Water Supply Uncertainty Escalating Water Supply Costs
State-wide Hydrologic drought
Delta Regulatory drought
Escalating Water Supply Costs
State Legislation – “20% Per Capita Reduction x 2020”
SB 1420, SB-7
OC Grand Jury Report “Water Budgets, Not Water Rationing”

3. WHAT IS A WATER BUDGET BASED TIERED RATE STRUCTURE?
“Water budget rate is an increasing block rate structure in which the block definition is different for each customer based on an efficient level of water use by that customer.”

4. INDOOR WATER BUDGET FACTORS
Gallons per capita per day (GPCD) = 60
Household Size (Default Values)
Single Family Residential (SFR): 4 Persons per household
Multifamily Residential (MFR)
Unrestricted: 3 persons per household
Restricted (LWV): 2 persons per household
Drought Factor = 100%

5. Indoor Water Budget

6. REAL TIME WEATHER DATA
EvapoTranspiration (ET) – loss of water from the soil both by evaporation and by transpiration from the plants growing
Reference ET (ET0) from Weather Station in Irvine
ET Adjustment Factors – landscape type and irrigation efficiency
Residential and Irrigation will have different ETAFs based on functionality. Parks, Golf Courses, Sport Fields will have ETAF =100%. Based on AB 1881, New Residential ETAF = 70% , Existing Residential ETAF = 80%.

7. Outdoor Water Budget

8. LAGUNA WOODS VILLAGE
Indoor water budgets will be determined based upon the number of dwelling units served by each meter x 120 GPCD
Outdoor water budgets will be determined based upon actual landscape square footage measurements served by each meter
Rates charged will vary by meter based upon the actual monthly indoor/outdoor usage compared to the calculated monthly water budget

9. IMPLEMENTATION
New Rate Structure effective July 1, 2010 (Subject to a June 24, 2010 public hearing at 4:00pm)
Tier III and IV rates will be phased in two increments (November 2010 & January 2011)
Communications with the Corporations, the community at large and PCM will take place in April, May and June
To accommodate the transition from the current interim water allocation program to the new rate structure the 2009/10 penalty assessment will be suspended with the bills received after May 1, 2010

10. RATE STRUCTURE OBJECTIVES
To be fair and equitable to all customers
Provide an economic incentive to use water efficiently
Shift costs for conservation programs and development of supplemental water supply to inefficient water users
Comply with legislative mandates
Maintain revenue stability