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SECTION C DESIGN CRIHRIA In ol'<ler to accomplish tile objectives of this study, the first major step taken was to gather information about the existing vlat.er systems of each membe". Information about future water rights,. existing facilities, present water SOUI'ces, I\"ater qua I ity, and treatment processes was collected and analyzed. These analyses indicated a need for additional domestic water supp ly in the future for many commun it i es. In oreel" to determi ne spec if ic water needs for eJch community, pl'esent water consu:olptions were studies, and three separate water demands were calculated. The first, average day de:oland, is calculated by dividing t~le total quantity of water used in one year by 365 days. This figure is then divided by the population of the municipality to obtain the ilverage day consumption per pel'son. (This is usually expressed as average dilY demand in gallons per capita per day - gpcd.) The second, maxil~um day demand, is the I arges t quant ity of water consumed in a tl':enty-four hour period over one year's time. Theoretically, a maximum day demand occurs only once per year, and by sizing water system facilities to handle a maximum day requiremer',t, a municipality should be assured of receiving enough water even on days of extremely high usage. The third water consump- tion figure, peak h0ur demand, is a theoretical value determined by multi- plyng the Quant ity of "later consumed in one hour of peak consumption on a maximum usage day by tI-;"nty-four hours. This number is usual1ydivided by the popu1dtion to obtain peak hour demand expressed in gallons per capita pel" day - gpcd. Transmission line facilities hove been sized to deliver maximum day demands to each m"mher in the .:iNr 2000. Iff dC i 1 i ti es were sized to supp 1y average 7 I .