Water: What You Pay For water

Initial Indoor Water Use Estimate

The initial few questions are used to identify the age of the house
to determine if it was built before or after the implementation of the
major plumbing code changes approved in 1992 as part of the Energy
Policy Act (EPAct).


Indoor water use for homes classified as "Pre-EPAct" is initially estimated using this equation:


Indoor water use = 87.41 y^0.69  x  365

Where y = the number of residents in the home.

Indoor water use for homes classified as "Post-EPAct" is initially estimated using this equation:


Indoor water use = 63.30 y^0.63  x  365

Where y = the number of residents in the home.

Indoor uses are then estimated using the following table:

Initial Indoor Water Use Estimate The initial few questions are used to identify the age of the house to determine if it was built before or after the implementation of the major plumbing code changes approved in 1992 as part of the Energy Policy Act (EPAct). Indoor water use for homes classified as "Pre-EPAct" is initially estimated using this equation: Indoor water use = 87.41 y0.69  x  365 Where y = the number of residents in the home. Indoor water use for homes classified as "Post-EPAct" is initially estimated using this equation: Indoor water use = 63.30 y0.63  x  365 Where y = the number of residents in the home. Indoor uses are then estimated using the following table: Pre-EPAct* Post-EPAct** Volume (gal/year) 25.5% 19.7% Toilet use 22.1% 20.7% Clothes washer use 17.4% 21.3% Shower use 15.1% 18.0% Faucet use 12.4% 14.0% Leak use 4.2% 2.4% Other use 1.8% 2.5% Bathtub use 1.5% 1.4% Dishwasher use *From Mayer,  P. et. al. (1999) Residential End Uses of Water.  American Water Works Association. Denver, Colorado. ** From Aquacraft (2004) EPA Combined Retrofit Studies.  Aquacraft, Inc. and the US Environmental Protections Agency.  Denver, Colorado. -- Thanking you, Have  a nice day L.Ramachandran 0431 2556258(R),2575260(O)