8.3 : Commercial Sector Water Consumption




8.3.6 Normalized Annual End Uses of Water in Two California High Schools
Range of Water Use Range of Water Use
Fixture/End Use (gal/room) (gal/person)
Toilet 2.9 - 3.2 206 - 271
Urinal 1.2 - 2.6 106 - 186
Faucet 1.0 - 2.3 87 - 165
Shower 0.5 - 0.7 44 - 47
Kitchen 0.7 - 1.0 58 - 58
Misc. uses (2) 0.9 68
Cooling - -
Leaks 1.6 - 3.6 112
Swimming Pool 0.4 - 0.9 31
Total Use 11.1 - 12.3 883
Average Logged average Indoor peak instantaneous
Building Size (SF) daily use (thousand gal) demand (gpm)
222326 9.1 - 16.4 41 - 60
Benchmarking Values for Schools (3) N 25th Percentile of Users
Indoor Use, Gal./sq. ft./year 142 8 - 16
Indoor Use, Gal./school day/student 141 3 - 15
Cooling Use, Gal./sq. ft./year 35 8 - 20
Note(s): 1) Water use data for the buildings was collected over a few days. Estimates of annual use were created by accounting for seasonal use and other variables, billing data, and interviews with building managers. 2) One high school. 3) The study derived efficiency benchmarks by analyzing measured data and audit data. The benchmark was set at the lower 25th percentile of users.









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