Water Use (GPD)		Water Savings (GPD)
Fixture [1]	Fixture Capacity [2]	Per Capita	2.7 Persons/ Household	Per Capita	2.7 Persons/ Household
Toilets [3]
Efficient	1.5 gallons per flush	6	16.2	n.a.	n.a.
Low-Flow	3.5 gallons per flush	14	37.8	8	21.6
Conventional	5.5 gallons per flush	22	59.4	16	43.2
Conventional	7.0 gallons per flush	28	75.6	22	59.4
Showerheads [2][4]
Efficient	2.5 (1.7) gallons/min	8.2	22.1	n.a.	n.a.
Low-Flow	3.0–5.0 (2.6) gal/min	12.5	33.8	4.3	11.7
Conventional	5.0–8.0 (3.4) gal/min	16.3	44	8.1	22
Faucets [2][5]
Efficient	2.5 (1.7) gallons/min	6.8	18.4	n.a.	n.a.
Low-Flow	3.0 (2.0) gallons/min	8	21.6	1.2	3.2
Conventional	3.0–7.0 (3.3) gal/min	13.2	36.6	6.4	17.2
Toilets, Showerheads, and Faucets Combined
Efficient	n.a.	21	56.7	n.a.	n.a.
Low-Flow	n.a.	34.5	93.2	13.4	36.4
Conventional	n.a.	54.5	147.2	33.5	90.4
GPD=Gallons per Day
n.a.= Not Applicable
[1] Efficient=post–1994; Low-Flow=post–1980; Conventional=pre–1980
[2] For showerheads and faucets the maximum rated fixture capacity (measured fixture capacity).  Measured fixture capacity equals about two-thirds of the maximum.
[3] Assumes four (4) flushes per person per day; does not include losses through leakage.
[4] Assumes 4.8 shower-use-minutes per person per day.
[5] Assumes 4.0 faucet-use-minutes per person per day.
Sources:  Adapted from National Small Flows Clearinghouse, Small Flows, Volume 9, Number 2, Spring 1995, West Virginia University, Morgantown, West Virginia, and reprinted from Journal American Water Works Association, Volume 82, No. 5 (May 1990), American Water Works Association.