Water Utility Rate Proof Spreadsheet, 2026-2028
Summary
The Idaho Public Utilities Commission released a rate proof spreadsheet for a water and sewer utility covering 2026-2028. Proposed fixed monthly charges range from $15 to $455 depending on customer class and meter size. Volumetric rates are proposed at $2.00 per unit in winter and $2.59-$2.95 per unit in summer blocks. The spreadsheet shows proposed revenues of $911,252 (2026), $967,794 (2027), and $1,024,374 (2028).
What changed
The Idaho Public Utilities Commission issued a rate proof spreadsheet setting proposed water and sewer utility rates for 2026-2028. Residential fixed charges are proposed at $42.00-$52.00/month; commercial lot charges range from $15.00 to $455.00 depending on meter size. Sewer charges are set at $145.00-$155.00/month for 2-inch meters. Volumetric rates are proposed at $2.00/unit in winter and $2.59-$2.95/unit in summer, with bulk water service fixed charges of $41-$46.11 and year-round volumetric rates of $2.47-$2.77/unit.
Affected parties include the regulated water/sewer utility and its customers within the service territory. The utility must implement these approved rates in its billing systems for the respective rate years. Customers will see changes in both fixed monthly charges and volumetric rates over the three-year period, with total proposed revenues increasing from approximately $911,000 to $1,024,000 annually.
Archived snapshot
Apr 16, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Sheet 1: RATE PROOF-COMM (2)
| RATE PROOF | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Commission Order | 0.5 | ||||||||||||||||||||
| MONTHLY FIXED | 2026 | 2027 | 2028 | ||||||||||||||||||
| CUSTOMER | METER SIZE | COUNT | BILLING MONTHS | **** | **** | MONTHLY FIXED CHARGE | REVENUE | **** | **** | MONTHLY FIXED CHARGE | REVENUE | **** | **** | MONTHLY FIXED CHARGE | REVENUE | **** | **** | **** | **** | **** | **** |
| RESIDENTIAL | 0.75 | 531 | 6372 | $42.00 | $267,624 | $42.00 | $267,624 | $42.00 | $267,624 | ||||||||||||
| 1 | 130 | 1560 | $52.00 | $81,120 | $52.00 | $81,120 | $52.00 | $81,120 | |||||||||||||
| COMMON LOT | 0.75 | 5 | 60 | $15.00 | $900 | $28.50 | $1,710 | $42.00 | $2,520 | ||||||||||||
| 1 | 47 | 564 | $15.00 | $8,460 | $33.50 | $18,894 | $52.00 | $29,328 | |||||||||||||
| 2 | 13 | 156 | $15.00 | $2,340 | $82.50 | $12,870 | $150.00 | $23,400 | |||||||||||||
| 4 | 1 | 12 | $15.00 | $180 | $227.50 | $2,730 | $455.00 | $5,460 | |||||||||||||
| SEWER | 2 | 1 | 12 | $145.00 | $1,740 | $155.00 | $1,860 | $150.00 | $1,800 | ||||||||||||
| subtotals | 728 | 8736 | $362,364 | $386,808 | $411,252 | ||||||||||||||||
| From Staff Comments | $363,212 | From Staff Comments | $385,198 | From Staff Comments | $408,515 | ||||||||||||||||
| VOLUMETRIC | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** |
| BLOCK 1 UNITS | BLOCK 2 UNITS | BLOCK 3 UNITS | **** | BLOCK 1 RATE | BLOCK 2 RATE | REVENUE | BLOCK 1 RATE | BLOCK 2 RATE | REVENUE | BLOCK 1 RATE | BLOCK 2 RATE | REVENUE | |||||||||
| WINTER | 42,840 | NA | NA | $2.000 | $85,681 | $2.000 | $85,681 | $2.000 | $85,681 | ||||||||||||
| SUMMER | 24,572 | 150,229 | NA | $2.590 | $2.590 | $452,735 | $2.770 | $2.770 | $484,199 | $2.950 | $2.950 | $515,663 | |||||||||
| $538,415 | $569,879 | $601,344 | |||||||||||||||||||
| From Staff Comments | $536,796 | From Staff Comments | $569,290 | From Staff Comments | $603,751 | ||||||||||||||||
| BULK WATER SERVICE | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | **** | |||||||
| FIXED | COUNT | BILLING MONTHS | **** | **** | FIXED CHARGE | REVENUE | **** | FIXED CHARGE | REVENUE | **** | FIXED CHARGE | REVENUE | |||||||||
| **** | 2 | 24 | $41 | $984 | $43.48 | $1,044 | $46.11 | $1,107 | |||||||||||||
| VOLUMETRIC CHARGE | |||||||||||||||||||||
| UNITS | **** | **** | RATE | REVENUE | RATE | REVENUE | RATE | REVENUE | |||||||||||||
| YEAR-ROUND | 3,847 | $2.47 | $9,488 | $2.62 | $10,063 | $2.77 | $10,672 | ||||||||||||||
| TOTALS | $911,252 | **** | **** | **** | $967,794 | **** | **** | **** | $1,024,374 | ||||||||||||
| **** | $910,481 | $965,595 | $1,024,045 |
Sheet 2: Rate Comparison
Sheet 3: Rate Comparison Charts
| Winter Increase In Year 1 for average customer | Winter Increase In Year 2 for average customer | Winter Increase In Year 3 for average customer | Commission Rates Proposed | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CUSTOMER | METER SIZE | Company | Staff | Commission | Company | Staff | Commission | Company | Staff | Commission | MONTHLY FIXED | Year 1 | Year 2 | Year 3 | ||||||||||||
| RESIDENTIAL | 0.75 | 6.00% | -27.65% | -9.57% | 5.99% | 6.05% | 0.00% | 5.96% | 6.05% | 0.00% | CUSTOMER | METER SIZE | ||||||||||||||
| 1 | 6.00% | 4.00% | 7.83% | 5.99% | 6.05% | 0.00% | 5.96% | 6.05% | 0.00% | RESIDENTIAL | 0.75 | $42.00 | $42.00 | $42.00 | ||||||||||||
| COMMON LOT | 0.75 | -68.42% | -27.78% | -68.42% | 0.00% | 6.05% | 90.00% | 0.00% | 6.05% | 47.37% | 1 | $52.00 | $52.00 | $52.00 | ||||||||||||
| 1 | 0.00% | 0.00% | 0.00% | 0.00% | 6.05% | 123.33% | 0.00% | 6.05% | 55.22% | COMMON LOT | 0.75 | $15.00 | $28.50 | $42.00 | ||||||||||||
| 2 | 0.00% | 0.00% | 0.00% | 0.00% | 6.05% | 450.00% | 0.00% | 6.05% | 81.82% | 1 | $15.00 | $33.50 | $52.00 | |||||||||||||
| 4 | 0.00% | 0.00% | 0.00% | 0.00% | 6.05% | 1416.67% | 0.00% | 6.05% | 100.00% | 2 | $15.00 | $82.50 | $150.00 | |||||||||||||
| SEWER | 2 | 6.00% | -16.64% | 8.65% | 6.12% | 6.05% | 0.82% | 6.21% | 6.05% | -0.40% | 4 | $15.00 | $227.50 | $455.00 | ||||||||||||
| TOTAL HOA | 26.32% | 1371.01% | 26.32% | 0.00% | 5.29% | 179.31% | 0.00% | 1.57% | 14.15% | SEWER | 2 | $145.00 | $155.00 | $150.00 | ||||||||||||
| VOLUMETRIC | **** | |||||||||||||||||||||||||
| Summer Increase In Year 1 for average customer | Summer Increase In Year 2 for average customer | Summer Increase In Year 3 for average customer | WINTER | $2.00 | $2.00 | $2.00 | ||||||||||||||||||||
| CUSTOMER | METER SIZE | Company | Staff | Commission | Company | Staff | Commission | Company | Staff | Commission | SUMMER | $2.59 | $2.77 | $2.95 | ||||||||||||
| RESIDENTIAL | 0.75 | 6.00% | 3.85% | 11.35% | 6.06% | 6.05% | 4.51% | 6.08% | 6.05% | 4.32% | BULK WATER SERVICE | **** | ||||||||||||||
| 1 | 6.00% | 31.51% | 24.43% | 6.09% | 6.05% | 5.40% | 6.14% | 6.05% | 5.12% | FIXED | $41.00 | $43.48 | $46.11 | |||||||||||||
| COMMON LOT | 0.75 | -17.97% | 15.26% | -2.03% | 5.37% | 6.05% | 15.57% | 38.04% | 6.05% | 13.47% | VOLUMETRIC CHARGE | $2.47 | $2.62 | $2.77 | ||||||||||||
| 1 | 21.00% | 88.21% | 44.50% | 5.37% | 6.05% | 27.50 | 38.04% | 6.05% | 15.99% | |||||||||||||||||
| 2 | 8.50% | 69.54% | 32.00% | 5.99% | 6.05% | 15.34% | 12.10% | 6.05% | 13.30% | |||||||||||||||||
| 4 | 8.50% | 120.88% | 32.00% | 5.99% | 6.05% | 33.65% | 12.10% | 6.05% | 26.59% | |||||||||||||||||
| SEWER | 2 | 6.00% | 52.34% | 36.90% | 6.12% | 6.05% | 6.94% | 6.21% | 6.05% | 5.59% | ||||||||||||||||
| TOTAL HOA | 6.67% | 86.58% | 29.40% | 5.89% | 6.05% | 23.38% | 16.15% | 6.05% | 19.60% | |||||||||||||||||
| Winter Increase In Year 1 for average customer | Winter Increase In Year 2 for average customer | Winter Increase In Year 3 for average customer | ||||||||||||||||||||||||
| CUSTOMER | METER SIZE | Company | Staff | Commission | Company | Staff | Commission | Company | Staff | Commission | ||||||||||||||||
| RESIDENTIAL | 0.75 | $3.45 | $(15.90) | $(5.50) | $3.65 | $2.52 | $- | $3.85 | $2.67 | $- | ||||||||||||||||
| 1 | $3.45 | $2.30 | $4.50 | $3.65 | $3.62 | $- | $3.85 | $3.84 | $- | |||||||||||||||||
| COMMON LOT | 0.75 | $(32.50) | $(13.20) | $(32.50) | $- | $2.08 | $13.50 | $- | $2.20 | $13.50 | ||||||||||||||||
| 1 | $15.00 | $52.51 | $15.00 | $- | $3.18 | $18.50 | $- | $3.37 | $18.50 | |||||||||||||||||
| 2 | $15.00 | $151.93 | $15.00 | $- | $9.20 | $67.50 | $- | $9.75 | $67.50 | |||||||||||||||||
| 4 | $15.00 | $459.99 | $15.00 | $- | $27.84 | $212.50 | $- | $29.53 | $227.50 | |||||||||||||||||
| SEWER | 2 | $67.65 | $(187.60) | $97.50 | $73.20 | $56.89 | $10.00 | $78.75 | $60.34 | $(5.00) | ||||||||||||||||
| TOTAL HOA | $12.50 | $651.23 | $12.50 | $- | $42.30 | $312.00 | $- | $44.86 | $327.00 | |||||||||||||||||
| Summer Increase In Year 1 for average customer | Summer Increase In Year 2 for average customer | Summer Increase In Year 3 for average customer | ||||||||||||||||||||||||
| CUSTOMER | METER SIZE | Company | Staff | Commission | Company | Staff | Commission | Company | Staff | Commission | ||||||||||||||||
| RESIDENTIAL | 0.75 | $6.45 | $4.14 | $12.20 | $6.90 | $6.76 | $5.40 | $7.35 | $7.17 | $5.40 | ||||||||||||||||
| 1 | $11.25 | $59.08 | $45.80 | $12.10 | $14.93 | $12.60 | $12.95 | $15.83 | $12.60 | |||||||||||||||||
| COMMON LOT | 0.75 | $(26.50) | $22.51 | $(3.00) | $6.50 | $10.29 | $22.50 | $48.50 | $10.91 | $22.50 | ||||||||||||||||
| 1 | $21.00 | $88.21 | $44.50 | $6.50 | $11.39 | $27.50 | $48.50 | $12.08 | $27.50 | |||||||||||||||||
| 2 | $51.00 | $417.24 | $192.00 | $39.00 | $61.58 | $121.50 | $83.50 | $65.30 | $121.50 | |||||||||||||||||
| 4 | $51.00 | $725.29 | $192.00 | $39.00 | $80.22 | $266.50 | $83.50 | $85.08 | $281.50 | |||||||||||||||||
| SEWER | 2 | $67.65 | $590.15 | $416.10 | $73.20 | $103.97 | $107.20 | $78.75 | $110.27 | $92.20 | ||||||||||||||||
| TOTAL HOA | $96.50 | $1,253.25 | $425.50 | $91.00 | $163.48 | $438.00 | $264.00 | $173.38 | $453.00 |
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