Saving Water and Saving Energy


Prepared by:
A.R. Rubin, Extension Specialist
Biological and Agricultural Engineering


Published by: North Carolina Cooperative Extension Service

Publication Number: HE-251

Last Electronic Revision: March 1996 (JWM)


CALCULATE YOUR WATER SAVINGS . . .

How would your family like to save $120 over the next year on its utility bills? Some families of four in North Carolina will be doing just that.

They will be doing it by modifying their commodes, faucets and showerheads to save water, which also helps to save electricity or gas used in pumping and heating water.

The devices needed to make the modifications cost about $20. They are available at most plumbing supply and hardware stores. They are easy to install.

The worksheets in this publication provide a step-by-step way for you to determine just how much money you can save with various conserving devices. Take a few minutes to fill out the worksheets. See if you can save $120. See if you can save more.

These worksheets were prepared as a part of the "Water Watch" program of the North Carolina Agricultural Extension Service. Extension workers believe water conservation makes good economic sense for North Carolina families. They also believe that competition for water is going to increase and that all segments of our society must learn to use it more wisely.


SHOWER AFTER SHOWER

Are you and your family typical when it comes to taking showers? Or, are you a water-conserving family? Find out by completing this sheet. If you are not sure of the water consumption of your shower, assume it's typical.

TYPICAL INDIVIDUAL                           WATER CONSERVING INDIVIDUAL                   MY FAMILY

1.  Uses ordinary showerheads with           Uses water-conserving showerheads with        ___________
    flow rate of 5 gals/minute.              flow rate of 3 gals/minute.                    gals/min

2.  Takes 5 to 10-minute showers.            Takes 5-minute showers.                       ___________
                                                                                             minutes
3.  Uses 25 to 50 gallons of water/shower.   Uses 15 gallons of water/shower.              
    (5 gal/min. x 5 min/day = 25 gal/day)    (3 gal/min  x  5 min/day =  15 gal/day)       ___________
    (5 gal/min x 10 min/day = 50 gal/day)                                                  gals/shower

4.  Uses 9125 gallons of water annually,     Uses 5475 gallons of water annually,          ___________
    assuming daily showers.                  assuming daily showers.                        gals/year
    (25 gals/shower x 365 showers/year =     (15 gals/shower x 365 showers/year =
    9125 gals/year)                          5475 gals/year)

5.  Spends $13.69 annually for shower        Spends $8.21 annually for shower             $___________
    water, assuming water rate is $1.50      water, assuming water rate is $1.50        
    per 1000 gallons.                        per 1000 gallons.
    (9.125 thousand x $1.50/thousand =       (5.475 thousand x $1.50/thousand =
    $13.69)$8.21)

6.  Uses 5475 gallons of hot water, assuming Uses 3285 gallons of hot water, assuming      ___________
    60% of shower water is heated.           60% of shower water is heated.                  gallons
    (9125 gal x .6 = 5475 gals)              (5475 gals x .6 = 3285 gals)

7.  Uses 1095 kwh electricity to heat the    Uses 821 kwh electricity to heat the water.   ___________
    water, assuming 1/5 kwh/gallon require   dassuming 1/5 kwh/gallon required                 kwh
    to heat water from 50 deg F to 13 deg F to heat water from 50 deg F to 130 deg F
    (5475 gals x .20 gals/kwh = 1095 kwh)    (3285 gals x .20 kwh/gals = 821 kwh)

8.  Spends $43.80 per year to heat shower    Spends $32.85 per year to heat shower        $___________     
    water, assuming electricity is 4 cents   water, assuming electricity is 4 cents
    per kilowatt hour.                       per kilowatt hour.
    (1095 kwh x $.04/kwh = $43.80)           (821 kwh x $.04/kwh = $32.84)

9.  Spends $57.49 per family member on       Spends $41.06 per family member on           $___________
    shower water and energy to heat water.   shower water and energy to heat water
    ($43.80 + $13.69 = $57.49)               ($32.84 + $8.21 = $41.05)

10. Has 4 persons in family.                 Has 4 persons in family.			   ___________

11. Spends $229.96 annually on shower        Spends $164.20 annually on shower water	  $___________
    water and energy for entire family.      and energy for entire family.
    (4  x  $57.49  =  $229.96)               (4  x  $41.05  =  $164.20)

FAUCET FACTS

Are you and your family typical when it comes to using the kitchen and bathroom faucets? Or, are you a water-conserving family? Find out by completing this sheet. If you don't know the water consumption of your faucet, then assume it's typical.
TYPICAL INDIVIDUAL			      WATER CONSERVING INDIVIDUAL                   MY FAMILY

1.  Uses ordinary faucet aerator with	      Uses low volume faucet aerator with	   ___________
    flow of 4 gpm.			      flow of 2 gpm.				    gals/min

2.  Uses faucets for 5 minutes per day.	      Uses faucets for 5 minutes per day.	   ___________
											   minutes/day
3.  Uses 20 gallons of water per day for      Uses 10 gallons of water per day for
    toothbrushing, shaving, dishwashing, etc. toothbrushing, shaving, dishwashing, etc	   ___________
    (4 gpm x 5 min/day = 20 gal/day)	      (2 gpm x 5 min/day = 10 gal/day)		     gals/day

4.  Uses 7300 gallons of water at the sink    Uses 3650 gallons of water at the sink	   ___________
    faucet annually.			      faucet annually.				    gals/year
    (20 gpd x 365 days/yr = 7300 gal/yr)      (10 gpd x 365 days/yr = 3650 gal/yr)

5.  Pays $1.50 for each 1000 gallons used     Pays $1.50 for each 1000 gallons used	  $___________
    or $10.95 per year for 7300 gallons.      or $5.48 per year for 3650 gallons.
    ($1.50 x 7.3 = $10.95)		      ($1.50 x 3.65 = $5.48)

6.  Uses 1625 gallons of hot water at	      Uses 910 gallons of hot water at		   ___________
    the faucet (assume 25% of total           the faucet (assume 25% of total		     gallons
    water used at faucet).		      water used at faucet).
    (7300 x .25 = 1625 gals!		      (3650 x .25 = 910 gals)

7.  Uses 325 kwh to heat that water	      Uses 182 kwh to heat that water		   ___________
    (assume 1 kwh will heat 5 gals).	      (assume 1 kwh will heat 5 gals).		       kwh
    (1625 gal x .2 kwh/gal = 325 kwh)	      (910 x .20 = 182 kwh)

8.  Spends $13.00 annually to heat water      Spends $7.28 annually to heat water	  $___________
    used at the faucet.			      used at the faucet.
    (325 kwh x $.04 = $13.00)		      (182 kwh x $.04 = $7.28)

9.  Spends $23.95 annually on water and	      Spends $14.60 annually on water and	  $___________
    energy at the faucets.	              energy at the faucets.
    ($13.00 + $10.95 = $23.95)		      ($7.28 + $5.48 = $12.76)

10. Has 4 family members.		      Has 4 family members.			   ___________
											   individuals
11. Spends $95.80 at the faucets.	      Spends $51.04 at the faucets.
(4 x $23.95 = $95.80)			      (4 x $12.76 = $51.04)			  $___________

TOILET TRAINING

Are you and your family typical when it comes to using a water closet (commode, toilet, "john")? Or, are you a water-conserving family? Find out by completing this sheet. If you don't know how much water your water closet uses, assume it's typical.
TYPICAL INDIVIDUAL			      WATER CONSERVING INDIVIDUAL               MY FAMILY 

1. Uses ordinary commode with a               Installs water saving device		__________
   capacity of 5 gallons/flush.               to reduce flush capacity to		gals/flush
					      3.5 gallons/flush.

2. Uses commode 5 times per day.	      Uses commode 5 times per day.		__________
											times/day

3. Uses 25 gallons of water per               Uses 17.5 gallons of water		__________
   day to carry waste.			      per day to carry waste.			 gals/day
   (5 gals/flush x 5 flushes/day =	      (3.5 gals/flush x 5 flushes/day =
   25 gallons)				      17.5 gallons)

4. Uses 9125 gallons of water each	      Uses 6388 gallons of water each		__________
   year to carry waste.                       year to carry waste.			gals/year
   (25 gals/day x 365 days/year =	      (17.5 gals/day x 365 days/year
   9125 gals)				      6388 gals)

5. Pays $1.50 for each 1000 gallons or	      Pays $1.50 for each 1000 gallons or      $__________
   $13.69 per year.			      $9.58 per year.
   ($1.50 x 9.125 thousands gals =	      ($1.50 x 6.388 thousands gals =
   $13.65)				      $9.58)

6. Has 4 people in the family and spends      Has 4 people in the family and spends    $__________
   $54.76 annually on water to carry	      $38.32 annually on water to carry
   waste.				      waste.
   (4 people/family x $13.69/person =	      (4 people/family x $9.58/person =
   $54.76)				      $38.32)


Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.
HE-251
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