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Table 1. Municipal Domestic Water Requirements Related to Population Served Number Gallona Water Requirements Population or per Capita Million Gal. Acre-Feet Yeat Served Services per Day M.G.D. per Year per Yeat El Paso, Texas 1910 39,279 5,300 77 3.0 1,090 3,350 1920 77,560 11,100 80 6.2 2,260 6,950 1930 102,421 14,500 81 8.3 3,030 9,300 1940 96,810 15,620 95 9.2 3,350 10,300 1950 130,003 21,044 142 18.5 6,760 20,800 1953 153,000 28,345 144 22.1 8,060 24,800 1960 174,000 34,000 145 25.0 9,100 28,000 1970 204,000 40,000 145 29.0 10,600 32,500 Albuquerque, New Mexico 1930 36,500 8,738 60 2.2 790 2,420 1940 38,000 9,055 103 3.9 1,420 4,360 1950 97,000 24,000 140 13.7 5,000 15,300 1954 157,000 38,000 152 23.8 8,700 26,700 Santa Fe, New Mexico 1940 13,800 3,058 109 1.5 535 1,640 1945 3,859 2.4' 871' 2,680' 1946 19,000 4,233 106 2.0 739 2,280 1950 25,500 5,664 106 2.7 991 3,040 1954 27,700 6,160 100 2.8 1,011 3,100 1960 33,000 7,400 100 3.3 1,200 3,700 1970 40,000 9,000 110 4.4 1,600 4,900 *Includes water for Army Hospital - Closed in 1945 .. , r' '" r-, ~ ~ ~ .i. 18 '\" . V ,I,.. ,",- is about normal and average for the existing condi.. tions. Both cities have dry climates, require irriga.. tioo of lawns and shrubs, use air conditioning, have varied industry, and have military installations. TOTAL REQUIREMENTS OF WATER The first and most pfOnounced factm in total water requirement of a city is availability. When water is available the next most important factor is the number of people served with domestic water. With per ca pita water requirements varying as previously described, the total quantity. for residen.. tial use will follow closely with population. Other special uses affect the total water required. Military establishments and industdal installations may cause sudden changes up or down in the total requirements. Losses of water can and often do materially affect the total quantity of water required to be pwduced. Losses occur by leakage in transmission mains, distribution storage reservoirs, and distribution mains and pipes. These losses sometimes run as high as 50 percent in a poorly constructed and maintained system, but in most well-operated systems the loss is less than 10 percent and often as low as 5 per- cent. This low percentage of loss is possible be- cause of the fact that a domestic water system is entirely closed. In contrast, the transmission losses of the Salt River Valley Water Users Association, Phoenix, Arizona, have recently been lowered from 39 percent to 3S percent as a result of an extensive reconstruction program. Curves which show the gfOwth and trend of pop- ulation served with domestic water in El Paso, Texas, Albuquerque, New Mexico, and Santa Fe, New Mexico, are plotted on Plate No.2. Other curves which show the gwwth and trend of total water requirements for El Paso, Albuquerque, and Santa Fe are plotted on Plate No.3. The above data are also shown in tabular form in Table No. 1. The population served with domestic water in both El Paso and Albuquerque has gwwn rapidly in the past ten years, and both are now at about 160,000 people served. The increased total water require- ments of each of these cities followed closely with population gfOwth, and at present each city uses approximately 26,000 acre-feet of water per year. The population served with water in Santa Fe also increased in the past ten years, -but not at the rapid rate of either Albuquerque Of El Paso. In the case of Santa Fe, it will be noticed on Plate No.3 that there was a definite drop in water requirements in If:] ;~~ '';," ~~ -.j '.-, :::; ,..j '"'I ;;'.:1 """1" ~'.., ~:". '.'l;,., .,~,::! ,',-j :"'1 -,",j 1:-; '""~ i ;:~1 l-.,.J ~.' ~<~ ~"''''~ ':'-~ ~~ :;.< "';