October 2012
8-5
Best Practices
Following are the first questions to evaluate when planning to use an onsite alterna-
tive water source:
••
Are there end use(s) that can be substituted or supplemented with the onsite
alternative water source?
••
What are the volume requirements of the end use, particularly if the demand is
seasonal in nature? Can the onsite alternative water source be matched to meet
the demand of the end use in terms of quantity and availability?
••
What are the water quality requirements of the end use? Can the onsite alterna-
tive water source meet those requirements?
8.
Onsite Alternative Water Sources
Onsite AlternativeWater Sources Case Study
To learn how the University of Texas at Austin used
onsite alternative water sources to reduce its po-
table water use by more than 33 percent, read the
case study in Appendix A.
Air Handler Units
Air Handler
Condensate
RO Reject
Roof Drains
Cooling
Tower
Toilets
&
Urinals
Cooling
Tower
Make-
Up
Outdoor Landscape
RO Units
Pressurized
Holding
Tank
Overflow
to
Stormdrain
Sediment
Tank
Holding
Tank
Figure 8-1. Examples of Onsite AlternativeWater Use
