Posted October 25, 201410 yr comment_237 Definition of Water Consumption (W.C) It is the amount of water consumed by a community in one day. It is usual to express water consumption in litres/capita/day. Average water consumption is usually 150 to 600 lpcd. Classification of W.C according to Use No. Purpose Use Quantity 1 Domestic Sanitary, Drinking, Washing, Bathing, Cooking, Gardening etc. ~ 50-250 lpcd 2 Commercial and Industrial Markets, Office buildings, Dental clinics, Private Schools, Garages, Workshops etc. ~ 12.2 cube m/1000 sq. m of floor area/day 3 Public Use Public buildings i.e. Tower halls, Jails, Schools, Street washing, public toilets, gardens + Fire fighting ~ 10-20% of total water supply 4 Unaccounted Loss of water through leaks, Unauthorized connections ~ 10-15% of total water supply Terms related to Water Consumption There are some important terms related to water consumption which are listed below, Average Daily Consumption Maximum Daily Consumption Peak Hourly Consumption 1 - Average Daily Consumption It is the average amount of water consumed by a community in one day divided by the number of people served. 2 - Maximum Daily Consumption It is the maximum water consumption during any one day in the year. It is about 150 to 180% of average day consumption. 3 - Peak Hourly Consumption: The peak consumption during any hour of the year excluding fire demand is called Peak Hourly Consumption. It is around 150% of the maximum daily consumption. Ratios of water consumption used in Design Most common ratios that are being used in the design of water distribution system for a certain community are as follows, Maximum Day : Average Day = 1.5 : 1 Peak Hour : Maximum Day = 1.5 : 1 Peak Hour : Average Day = 2.25 : 1 The above ratios can be different depending upon the specific needs of the community and design criteria.
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