SFPUC Wholesale Customer Water Demand Projections ... - BAWSCA

City of Mountain View Water Service Area 1 , DSS Input Sheet, FINAL INPUT SHEET
Base Year Average Use and Indoor Percentages by Billing Category for DSS Model 2
Single Family
Multifamily
Commercial
Industrial
Landscape Irrigation
Other
Year Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor Average, gpd/a Indoor
2001 242 66% 4105 83% 1691 86% 1702 74% 4641 22% 250 18%
Data for DSS Model - - Base Year 2001
Reconcile agency account billing data and census data
Number of Water Use Water Use,
Total Dwelling Units in Census 2000 for City of Mountain View
Category Accounts 2001 MGD Use Profile Water Use Indoor Water Use
FY. 2001 3 gpd/a 2 2001 Percent gcd gcd
Single Family 12,473 242 3.01 24.30% 109 72
Multifamily 815 4,105 3.35 26.98% 77 64
Service Area Billing Difference between
Commercial 1,162 1,691 1.96 15.85%
Accounts - Year 2000 billing and census
Industrial 416 1,702 0.71 5.71%
Single family
2000 Units
No. Buildings
3
data
Landscape Irrigation 723 4,641 3.36 27.06% 1-detached 9,147 9,147
Other 49 250 0.01 0.10% 1-attached 3,701 3,701
0 0 0.00 0.00% Subtotal 12,848 12,848 10,800 -2,048 Housing Characteristics from U.S. Census Bureau
0 0 0.00 0.00% Multi family
Total 15,638 12.40 100.00% 2-units 783 392
Total Water Purchased (produced) 4 = 12.26 MGD 3-4 units 1,887 539
Unaccounted For Water (UFW) 5 = 2.2% Percent From 5 year BAWUA Survey average 5 to 9 units 2,870 410
Estimated UFW for DSS Model = 7% Percent 7% if actual is < 7%, otherwise = E25 10-19 units 2,916 194
Water Produced for use in DSS Model 13.27 MGD Add UFW to Total Water Use 20 or more units 9,902 198
Meter for assumed 50 units per building.
Peaking Factor 1.50 Provided by Agency or SFPUC Water Master Plan (or NA) mobile homes 1,195 24
Meter for mobile home parks, assume 50 per park.
Peaking Factor for DSS Model= 1.5 If NA use default value of 1.6. Subtotal 19,553 1,757 2,493 736
MF Average = 11.1 units/building 7.8 units/account
- Blue cells are entered by modeler
- Yellow cells are input to DSS Model 12,630 Total SF + MF units = 32,401
Data Sources / Notes
NOTES
1. - Communities served includes City of Mountain View according to BAWUA survey
Population and Household Size in Census 2000 forCity of Mountain View Estimated
Residential
City of Mountain View City of Mountain View Service Area
Census Population Estimated Population Population
2 - Average gpd/a is based on a 12-month moving average through December 2001. Indoor use is based on average of 2 lowest consecutive months in the
winter if meters read bimonthly, or single lowest month if meters read monthly.
3 - Number of accounts is from data provided by water agency for this project (see worksheet with account data in this file)
4 - Total water Purchased (produced) taken from BAWUA for Fiscal Year 2001-2002.
5 - Unaccounted for Water (UFW) is the percent difference between the total water purchased and the total water use.
6 - For reference see additional population estimates provided in population and employment estimates corresponding to service area table.
7 - Initial estimate based on census data for renter occupied units. For reference see table below that has 2000 census data for corresponding water
service area city or cities.
Data Sources / Notes
2000 2001 2001 Estimated growth from 2000 to 2001 (CA DOF Projections): 1.12%
Total Population from Census data 6 = 70,708 71500 Estimated employment growth from 2000 to 2001 (ABAG Employment Projections): 0.36%
Subtract Institutionalized Population = 307 310 Water use for the institutionalized population is accounted for in nonresidential billing categories
Residential Population = 70,401 71,190 Residential population shown corresponds to the city or cities represented by Census data
Avg. HHS 7 = 2.17
MF Pop @ MF HHS 7 = 2.15 42,039 42,510 43,625 59.7% Percent of Population that is MF
SF Pop = 28,362 28,680 27,534 40.3% Percent of Population that is SF
SF HHS 7 = 2.21
Total 71,160 100.0%
-190 Difference in our estimate and average of 2000-2001 and 2001-2002 BAWUA Surveys
120 Difference in our estimate and the average 2000-2001 and 2001-2002 BAWUA Surveys including institutionalized population
2000 Census Data
Average household size 2.25 Estimate Service Area Dwelling Units for 2001
Average household size of owner-occupied unit 2.30 SF Res 12,473 Equals billing accounts in 2001 from cell C15
Average household size of renter-occupied unit 2.21 MF Res 20,291 Equals billing accounts in 2001 from cell C16 times average units per building in cell L31
Homeowner vacancy rate (percent) 0.60
Rental vacancy rate (percent) 1.60 Population and Employment Estimates Corresponding to Service Area
Population
Employment
2000 Census data for jurisdiction 70,708 NA
2000 ABAG (jurisdictional) 70,708 75,370
2005 ABAG Projection (jurisdictional) 73,100 76,710
2000 ABAG (subregional) 70,877 77,370
2005 ABAG Projection (subregional) 73,300 78,710
2000 Department of Finance Benchmark 70,708 From State of California Department of Finance (DOF) table E-4 as of 4-1-2000. Website www.dof.ca.gov
Data Prepared : July 24, 2003 By: N. Foged 2001 Department of Finance Estimate 71,500 From State of California Department of Finance table E-4 as of 1-1-2001. Website www.dof.ca.gov
Revised: January 21, 2004 By: N. Foged 2002 Department of Finance Estimate 71,500 From State of California Department of Finance table E-4 as of 1-1-2002. Website www.dof.ca.gov
FY 2000-2001 BAWUA service area 70,700 NA
FY 2001-2002 BAWUA service area 72,000
2001 Employment in Service Area (input to DSS Model) = 75,629 Service Area Employment is determined by the ratio of the 2000-2001 BAWUA service area population to the
2000 ABAG Subregional Population and escalated to 2001 using the assumed growth rate (ABAG, 2002)
Definitions / Abbreviations
ABAG Association of Bay Area Governments MF multi family
BAWUA Bay Area Water Users Association MGD million gallons per day
DSS Decision Support System Model No. number
du dwelling unit Pop population
FY Fiscal Year Res residential
gpd/a gallons per day / per account SF single family
gpd gallons per day UFW unaccounted for water
HHS
household size