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Page 11 'iiu t unxjf in. TOTAL RANGE viicu. 80% RANGE 50% RANGE Median Low High Diff. Low High Diff. Low S i g h Diff. Total $ .83 $.09 $2.00 $1.91 $ .45 $1.42 $ .97 $ .55 $1.05 $.50 Group I .87 .55 1.50 1.17 .50 1.42 .92 .75 Group II 1.00 .25 1.00 .17 1.62 1.45 .40 1.39 .99 .50 1.00 .50 Group III .88 .25 1.65 1.40 .50 1.25 .75 .54 1.00 .46 Group IV .83 .09 2.00 1.91 .42 1.50 1.08 .60 1.15 .55 Monthly Charge: 5.000 Gallons Median Low High Diff. Low High Diff. Low High Diff. Total $1.00 $.38 $3.00 $2.62 $ .72 $1.51 $ .79 $ .89 $1.33 $.44 Group I .98 .75 1.74 .99 .85 1.42 .59 .88 1.05 .17 Group II 1.00 .38 1.65 1.27 .60 1.43 • S3 .83 1.25 .42 Group III 1.00 .50 2.05 1.55 .75 1.50 .75 .90 1.21 .31 Group IV 1.10 .45 3.00 2.55 .68 1.75 1.07 .88 1.40 .52 Monthly Charge: 5,000 Gallons Median Low High Diff. Low High Diff. Low High Diff. Total $1.50 $.53 $4.00 $5.47 $ .95 $2.35 $1.40 $1.20 $1.83 $.63 Group I 1.55 .85 2.22 1.39 .90 2.03 1.13 .97 1.47 .50 Group II 1.40 .53 2.46 1.95 .90 2.10 1.20 1.13 1.67 .54 Group III 1.44 .60 3.17 2.57 1.00 2.25 1.25 1.17 1.80 .63 Group IV 1.54 .64 4.00 3.56 .95 2.50 1.55 1.25 2.00 .75 5. Usual Billing Period Monthly or Quarterly 85% of the total cases are billed either monthly or quarterly (slightly more monthly than quarterly). Among the cities of over 100,000 population, all of the billing is done monthly or quarterly. In many cases when the billing covers a longer period, a portion of the bills are sent out each month. Al­most invariably, industrial users are billed quarterly or monthly, even when domestic users are billed semi-annually or annually. The importance of this fact is that it indicates most municipal water systems have a regular supply of income throughout the year rather than having revenue concentrated at one or two peak periods. TABLE 3. Monthly Quarterly Semi- Annually Annually Total 43.9% 40.6% 9.2% 6.5% Group I 44.4% 55.6% «B» Group II 45.3 29.7 15.6% 9.4% Group III 50.0 57.2 9.6 3.2 Group IV 59.4 44.6 8.0 8.0