SFPUC Wholesale Customer Water Demand Projections ... - BAWSCA

North Coast County WD 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
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 260 75% 1391 85% 790 85% 600 0% 1721 32%
Data for DSS Model - - Base Year 2001
Number of Water Use Water Use,
Total Dwelling Units in Census 2000 for Pacifica
Category Accounts 2001 MGD Use Profile Water Use Indoor Water Use
FY. 2001 3 gpd/a 2 2001 Percent gcd gcd
Single Family 9,309 260 2.42 71.30% 75 57
Multifamily 392 1,391 0.55 16.07% 65 56
Service Area Billing
Commercial 250 790 0.20 5.81%
Accounts - Year 2000
Irrigation 59 600 0.04 1.04%
Single family
2000 Units
No. Buildings
3
Other 114 1,721 0.20 5.78% 1-detached 10,276 10,276
0 0 0.00 0.00% 1-attached 775 775
0 0 0.00 0.00% Subtotal 11,051 11,051 11,218 167
0 0 0.00 0.00% Multi family
Total 10,123 3.39 100.00% 2-units 172 86
Total Water Purchased (produced) 4 = 3.40 MGD 3-4 units 535 153
Unaccounted For Water (UFW) 5 = 6% Percent From 5 year BAWUA Survey average 5 to 9 units 686 98
Estimated UFW for DSS Model = 7% Percent 7% if actual is < 7%, otherwise = E25 10-19 units 370 25
Water Produced for use in DSS Model 3.63 MGD Add UFW to Total Water Use 20 or more units 1,343 27
Peaking Factor NA Provided by Agency or SFPUC Water Master Plan (or NA) mobile homes 98 2
Peaking Factor for DSS Model= 1.6 If NA use default value of 1.6. Subtotal 3,204 390 362 -29
- Yellow cells are input to DSS Model MF Average = 8.2 units/building 8.9 units/account
NOTES Total SF + MF units = 14,255
1. - Communities served (includes all or portions of) Pacifica and nearby unincorporated areas according to BAWUA survey
Population and Household Size in Census 2000 for Pacifica
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 or agency if provided.
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.
Estimated
Residential
City of Pacifica City of Pacifica Service Area
Census Population Estimated Population Population
Reconcile agency account billing data and census data
Meter for assumed 50 units per building
Meter for mobile home parks, assume 50 per park
See estimate at bottom.
Data Sources / Notes
Data Sources / Notes
2000 2001 2001 Estimated growth from 2000 to 2001 (CA DOF Projections): 0.81%
Total Population from Census data 6 = 38,390 38700 Estimated employment growth from 2000 to 2001 (ABAG Employment Projections): 0.93%
Subtract Institutionalized Population = 142 143 Water use for the institutionalized population is accounted for in nonresidential billing categories
Residential Population = 38,248 38,557 Residential population shown corresponds to the city or cities represented by Census data
Avg. HHS 7 = 2.68
MF Pop @ MF HHS 7 = 2.40 7,690 7,752 8,352 20.1% Percent of Population that is MF
SF Pop = 30,558 30,805 32,105 79.9% Percent of Population that is SF
7 - Initial estimate based on census data for renter occupied units. For reference see table below that has 2000 census data for corresponding water
SF HHS 7 = 2.77
service area city or cities.
Total 40,457 100.0%
2000 Census Data -43 Difference in our estimate and average of 2000-2001 and 2001-2002 BAWUA Surveys
Average household size 2.73 -186 Difference in our estimate and the average 2000-2001 and 2001-2002 BAWUA Surveys including institutionalized population
Average household size of owner-occupied unit 2.88
Average household size of renter-occupied unit 2.41 Estimate Service Area Dwelling Units for 2001
Homeowner vacancy rate (percent) 0.20 SF Res 11,140 Equals No. Buildings from cell M21 plus growth in accounts for one year from cell T38
Rental vacancy rate (percent) 1.90 MF Res 3,230 Equals billing accounts in 2001 from cell C16 times average units per account in cell N30 (or average units per building in cell L30 to minimize population difference in cell N47)
Population and Employment Estimates Corresponding to Service Area 2.585765855
Population Employment 2.881909923
2000 Census data for jurisdiction 38,390 NA
2000 ABAG (jurisdictional) 38,390 4,740
2005 ABAG Projection (jurisdictional) 39,900 4,960
2000 ABAG (subregional) 38,445 4,740
Data Prepared : August 15, 2003 By: B. Skeens 2005 ABAG Projection (subregional) 40,000 4,960
Revised: September 5, 2003 2000 Department of Finance Benchmark 38,390 From State of California Department of Finance (DOF) table E-4 as of 4-1-2000. Website www.dof.ca.gov
2001 Department of Finance Estimate 38,700 From State of California Department of Finance table E-4 as of 1-1-2001. Website www.dof.ca.gov
2002 Department of Finance Estimate 38,600 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 40,500 NA
FY 2001-2002 BAWUA service area 40,500 NA
2001 Employment in Service Area (input to DSS Model) = 5,797 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 in cell T39.
Difference
between billing
and census data
Housing Characteristics from U.S. Census Bureau
Estimate Multi Family Accounts and Water Use
Definitions / Abbreviations
ABAG Association of Bay Area Governments MF multi family MF Indoor Use (gcd)= 56
BAWUA Bay Area Water Users Association MGD million gallons per day MF Indoor % = 85%
DSS Decision Support System Model No. number MF mgd = 0.55
du dwelling unit Pop population 2000 Accts from SF 362
FY Fiscal Year Res residential 2000 Accts from COM 27
gpd/a gallons per day / per account SF single family 2001 Accts 392
gpd gallons per day UFW unaccounted for water 2001 gpd/acct 1391
HHS household size DOF California Department of Finance 2001 mgd from SF 0.50
2001 mgd from COM 0.04
2001 Accts from SF 1934
2001 Accts from COM 47
Baseline H45 MF HHS= 2.59
Baseline H44 SF HHS= 3.45