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Water Efficient Household Appliances
Replacing an old 3.5 gallon per flush toilet with a High-Efficiency model can save an average of 38 gallons per day. Upgrading from a ULFT to a HET can save an average of 7 gallons per day.
Toilet Type Gallons Per Flush 
High-Efficiency Toilets (HETs) 1.28
Ultra Low Flow Toilets (ULFTs) 1.60

High-Efficiency Clothes Washers (HEWs)
The water efficiency of clothes washers is rated using the term "water factor" to describe and compare its water use. Water factor (WF) is measured by the quantity of water (gallons) used to wash each cubic foot of laundry. A lower water factor represents greater water and energy efficiency.

Federal Efficiency Standards
  • Federal Standard WF - 9.5
  • ENERGY STAR® WF - 6.0
  • CEE (Consortium for Energy Efficiency) Tier 1 - 6.0
  • CEE Tier 2 - 4.5
  • CEE Tier 3 - 4.0

**Source: California Urban Water Conservation Council website