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44 VI RATES AMD CUSTOMER SERVICE As heretofore stated, under the laws of the State of Nevada, water service by private utilities in cities and towns of more than 4,500 population must be served on a flat-rate basis. No metered service is permitted. The distribution of services as between classes of customers should be kept in mind and may again be set down as of December 31, 1949: Customers .ss of Customers Number $ of Total Residential 7,047 89.95 Commercial 749 9.56 Industrial 20 0.26 Municipal 18 0.23 Total ' 7,'SM 1 0 0 .0 0 Thus it is a fact that practically 90$ of the customers served are residential. Such customers provide approximately 76.4$ of the revenue. If the commercial group be added, then 99.5$ of all customers are accounted for and these two classes together pay in approximately 97$ of the gross revenue. Rate Tariffs Now in Effect Plat rates now effective are those, with minor exceptions, that were authorized by the Public Service Commission in 1931. The Water Utility has a fairly complete set of flat rates on file with the Commission - numbering sixty or more. Such rates have been reproduced and made a part of this re­port as Table R in the Appendix. In this table there are likewise included the proposed rates; the difference between the two rates; the number of customers in each classification that are affected; and finally, the estimated monthly increases in revenue that would result from the proposed rates. Proposed Increases In selecting the amount of the increase the following facts and circumstances were given controlling weight: