Well Water Usage Estimations

Flush water closet:                    1 to 5 gallons

Shower:                                  10 to 25 gallons

Operate dishwasher:                  12 to 15 gallons

Wash load of clothes:                 20 to 50 gallons

Assumptions

1. Highest usage rate at awakening-- normally a 1 to 2 hour period in morning.
2. Each person takes a shower and flushes the water closet twice; total 15 to 35 gallons/person.
3. Each household washes a load of dishes and clothing, 35 to 65 gallons.
4. Two people per bedroom.
5. Assume a 30 to 40 gallon storage tank.

Domestic Water Required (2-hour period)

1 Bedroom/2 people 2 Bedroom/4 people 3 Bedroom/6 people

            70 gal                    140 gal                       210 gal
       +Basic    65 gal         +Basic   65 gal             +Basic    65 gal
       Total     135 gal        Total     205 gal            Total     275 gal
       -Storage  40 gal        -Storage  40 gal            -Storage 40 gal
                    95 gal                   165 gal                       235 gal

Flow Rate 1 ½ gal/min     Flow Rate 3 gal/min     Flow Rate 4 gal/min

4 Bedroom /8 people 5 Bedroom/10 people

            280 gal                      350 gal
       +Basic  65 gal             +Basic 65 gal
       Total   345 gal              Total 415 gal
       -Storage 40 gal          -Storage 40 gal
                 305 gal                     375 gal

    Flow Rate 5 gal/min    Flow Rate 6 gal/min