Tier 1 Budget Assumption

Reference(s)

4 persons per household

California Department of Finance Housing Estimates, 2009

• City of Montclair =               3.854 persons per household
• City of Chino =                   3.586

75 gallons per person per day

American Water Works Association’s Residential End-Use Study, 1999

• Average daily indoor use per person = 69.3 gallons

Jan-Feb

Mar-Apr

May-Jun

Jul-Aug

Sep-Oct

Nov-Dec

Total

10%

7%

13%

25%

25%

20%

100%

Tier 2 Budget Assumption

Reference(s)

Lot Size

San Bernardino County Office of the Assessor

• Parcel Data – Size of Parcel (sq.ft.)

Dwelling Footprint

San Bernardino County Office of the Assessor

• Parcel Data – Original Structure First Floor (sq.ft.)

Hardscape

20% of Remaining Parcel (Lot Size – Dwelling Footprint)

• Ex.: Additions, garage/carports, paved areas, patios, sheds, etc.

54 inches of water / sq.ft. landscape area

California Irrigation Management Information System (CIMIS)

• Average annual amount needed for growing healthy grass
• Nearest CIMIS Station (Pomona) = 48 inches per year

Seasonal Allocation

Combination of CIMIS seasonal plant water needs and District seasonal customer use patterns

• Note: Billing cycle reflects usage over prior two months.
  Ex: June 15 meter read = April 15 through June 15 usage