WS - D - Tiffin Water Study $15 Base Rate & 50-50 Increase Summary

WATER RATE ANALYSIS City of Tiffin, Iowa * This is based on the Water portion of the utility bill and does not include sewer Based on 14.384M 20 year 3.09% SRF water revenue loan 50-50 Increase Proposed Rate Increases Current FY2025 FY2026 FY 2027 FY2028 Min. Bill Gallons 0 0 Usage Rate per 1,000 Gallons $5.50 $7.18 $8.87 $10.55 Base Rate $7.00 $9.15 $11.30 $13.45 User Impacts 1,000 12.50 16.33 20.17 24.00 2,000 18.00 23.51 29.04 34.55 4,000 29.00 37.87 46.78 55.65 10,000 62.00 80.95 100.00 118.95 25,000 144.50 188.65 233.05 277.20 Key Assumptions * Assumes utility rates/growth will increase to match inflation in operation and maintenance costs * Assumes Operating rate increases maintain a 2% increase on base rate and flow rate Estimate and subject to change based on project cost and actual operating revenues and expenditures Prepared by Northland Securities, Inc. on 5/1/2025