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Table L3: Some South African domestic water consumption category data for formal
urban households (continued).
Use category Details
Car washing (once a week for eight minutes 6 240 I annually
using a hosepipe)
Note: Use of a hosepipe rather than a bucket
results in a ten-fold increase in water
consumption
Garden sprinkler
Up to 1 500 I h-1+
Source: (i) After the Department of Water Affairs and Forestry. Pretoria. 1993.
(ii) After Umgeni Water. Pietermaritzburg. 1993 (data marked with an
asterisk).
Note: (i) The National Building Research Institute (now the Division of Building
Technology) of the CSIR. provided data for a typical dwelling with
four (white) occupants which illustrates the reduction in water
consumption (some 40%). which could be achieved by ordinary
householders without drastic lifestyle changes. The data concern
mean daily indoor water consumption (see below).
Use category Consumption by a non-water Consumption by a water
saving household saving household
Bath Two baths at a depth 180 I One bath at a depth 80 I
of 150mm of 100 mm
Shower Two showers at 7.5 I 75 t Three showers at ± 70 I
min- 1 for five minutes 6 t min- 1 for four
each minutes each (taps
closed while
soaping)
Wash basin Water used freely 30 I Water used carefully 20 I
Toilet 16 uses at ± 12 I per 190 I Volume of flush 70 I
flush reduced and short
flushes used as
necessary
Cooking and drinking As per needs 15 t As per needs 15 I
Dish washing Sink filled with water 40 t Water used sparingly 20 I
each time
Twin-tub washing Per wash cycle 90 I Per wash cycle 90 I
machine
Hand washing of Water used carelessly 20 t Water used sparingly 15 t
clothes. floors.
windows and other
items
Mean consumption 160 t capita- 1 day-1 95 I capita- 1 day-1
x4 = 6401 x4 = 380 t