South Dakota · EIA utility 14232
Otter Tail Power Co
Residential electricity records · Investor Owned
- Average bill · 2025
- $123.34
- Average kWh · 2025
- 1,079.9
- Revenue per kWh · 2025
- 11.42¢
Annual average electricity bill
$111.78 → $123.34 per customer · +$11.56 change
| Year | Monthly bill | Monthly kWh | Revenue per kWh | Customers |
|---|---|---|---|---|
| 2023 source workbook | $121.87 | 1,095.8 | 11.12¢ | 9,006 |
| 2024 source workbook | $111.78 | 1,022.9 | 10.93¢ | 9,048 |
| 2025 source workbook | $123.34 | 1,079.9 | 11.42¢ | 9,094 |
| Periods | Earlier bill | Later bill | Bill change | Contribution from revenue per kWh | Contribution from usage |
|---|---|---|---|---|---|
| 2023 to 2024 | $121.87 | $111.78 | -$10.09 | -$2.05 | -$8.04 |
| 2024 to 2025 | $111.78 | $123.34 | +$11.56 | +$5.19 | +$6.37 |
Compare the same month across years
$117.50 → $128.95 per customer · +$11.45 change
$129.25 → $143.63 per customer · +$14.38 change
$109.61 → $88.25 per customer · -$21.35 change
$88.56 → $74.85 per customer · -$13.71 change
$106.74 → $105.95 per customer · -$0.78 change
$124.68 → $147.63 per customer · +$22.96 change
$159.16 → $171.80 per customer · +$12.64 change
$178.26 → $181.26 per customer · +$3.00 change
$139.63 → $160.92 per customer · +$21.29 change
$104.29 → $102.40 per customer · -$1.89 change
$92.67 → $96.33 per customer · +$3.66 change
$90.02 → $107.24 per customer · +$17.21 change
$121.15 → $117.50 per customer · -$3.65 change
$118.60 → $129.25 per customer · +$10.65 change
$93.46 → $109.61 per customer · +$16.15 change
$77.33 → $88.56 per customer · +$11.23 change
$74.93 → $106.74 per customer · +$31.81 change
$130.92 → $124.68 per customer · -$6.24 change
$127.42 → $159.16 per customer · +$31.74 change
$171.19 → $178.26 per customer · +$7.07 change
See every same-month comparison
| Periods | Earlier bill | Later bill | Bill change | Contribution from revenue per kWh | Contribution from usage |
|---|---|---|---|---|---|
| August 2025 to August 2026 · includes preliminary data | $117.50 | $128.95 | +$11.45 | +$3.77 | +$7.69 |
| July 2025 to July 2026 · includes preliminary data | $129.25 | $143.63 | +$14.38 | +$3.64 | +$10.74 |
| June 2025 to June 2026 · includes preliminary data | $109.61 | $88.25 | -$21.35 | -$23.24 | +$1.88 |
| May 2025 to May 2026 · includes preliminary data | $88.56 | $74.85 | -$13.71 | -$15.99 | +$2.27 |
| April 2025 to April 2026 · includes preliminary data | $106.74 | $105.95 | -$0.78 | -$3.62 | +$2.84 |
| March 2025 to March 2026 · includes preliminary data | $124.68 | $147.63 | +$22.96 | +$28.43 | -$5.48 |
| February 2025 to February 2026 · includes preliminary data | $159.16 | $171.80 | +$12.64 | +$34.13 | -$21.49 |
| January 2025 to January 2026 · includes preliminary data | $178.26 | $181.26 | +$3.00 | +$3.27 | -$0.27 |
| December 2024 to December 2025 | $139.63 | $160.92 | +$21.29 | +$18.51 | +$2.78 |
| November 2024 to November 2025 | $104.29 | $102.40 | -$1.89 | -$1.81 | -$0.08 |
| October 2024 to October 2025 | $92.67 | $96.33 | +$3.66 | -$4.60 | +$8.25 |
| September 2024 to September 2025 | $90.02 | $107.24 | +$17.21 | +$14.07 | +$3.14 |
| August 2024 to August 2025 | $121.15 | $117.50 | -$3.65 | -$4.68 | +$1.03 |
| July 2024 to July 2025 | $118.60 | $129.25 | +$10.65 | +$4.37 | +$6.28 |
| June 2024 to June 2025 | $93.46 | $109.61 | +$16.15 | +$14.25 | +$1.90 |
| May 2024 to May 2025 | $77.33 | $88.56 | +$11.23 | +$4.81 | +$6.42 |
| April 2024 to April 2025 | $74.93 | $106.74 | +$31.81 | +$30.13 | +$1.68 |
| March 2024 to March 2025 | $130.92 | $124.68 | -$6.24 | -$10.67 | +$4.43 |
| February 2024 to February 2025 | $127.42 | $159.16 | +$31.74 | -$0.29 | +$32.02 |
| January 2024 to January 2025 | $171.19 | $178.26 | +$7.07 | -$0.12 | +$7.19 |
See reported months and EIA data status
| Month | Average bill | Average kWh | Revenue per kWh | Customers | EIA status |
|---|---|---|---|---|---|
| August 2026 | $128.95 | 1,020 | 12.64¢ | 9,190 | Preliminary |
| July 2026 | $143.63 | 1,078.4 | 13.32¢ | 9,191 | Preliminary |
| June 2026 | $88.25 | 806.7 | 10.94¢ | 9,176 | Preliminary |
| May 2026 | $74.85 | 842.6 | 8.88¢ | 9,165 | Preliminary |
| April 2026 | $105.95 | 1,001.7 | 10.58¢ | 9,162 | Preliminary |
| March 2026 | $147.63 | 1,219.6 | 12.11¢ | 9,084 | Preliminary |
| February 2026 | $171.80 | 1,328.5 | 12.93¢ | 9,074 | Preliminary |
| January 2026 | $181.26 | 1,666.9 | 10.87¢ | 9,077 | Preliminary |
| December 2025 | $160.92 | 1,296.3 | 12.41¢ | 9,076 | Final |
| November 2025 | $102.40 | 963.3 | 10.63¢ | 9,064 | Final |
| October 2025 | $96.33 | 860.3 | 11.20¢ | 9,084 | Final |
| September 2025 | $107.24 | 857.1 | 12.51¢ | 9,157 | Final |
| August 2025 | $117.50 | 958.3 | 12.26¢ | 9,147 | Final |
| July 2025 | $129.25 | 996.7 | 12.97¢ | 9,150 | Final |
| June 2025 | $109.61 | 791.5 | 13.85¢ | 9,150 | Final |
| May 2025 | $88.56 | 819.5 | 10.81¢ | 9,092 | Final |
| April 2025 | $106.74 | 975.3 | 10.94¢ | 9,059 | Final |
| March 2025 | $124.68 | 1,269.6 | 9.82¢ | 9,053 | Final |
| February 2025 | $159.16 | 1,511.7 | 10.53¢ | 9,048 | Final |
| January 2025 | $178.26 | 1,669.4 | 10.68¢ | 9,048 | Final |
| December 2024 | $139.63 | 1,272.6 | 10.97¢ | 9,041 | Final |
| November 2024 | $104.29 | 964.1 | 10.82¢ | 9,020 | Final |
| October 2024 | $92.67 | 788.4 | 11.75¢ | 9,047 | Final |
| September 2024 | $90.02 | 830.2 | 10.84¢ | 9,098 | Final |
| August 2024 | $121.15 | 950 | 12.75¢ | 9,107 | Final |
| July 2024 | $118.60 | 947.5 | 12.52¢ | 9,111 | Final |
| June 2024 | $93.46 | 776.9 | 12.03¢ | 9,094 | Final |
| May 2024 | $77.33 | 758.4 | 10.20¢ | 9,050 | Final |
| April 2024 | $74.93 | 957.4 | 7.83¢ | 9,001 | Final |
| March 2024 | $130.92 | 1,226.3 | 10.68¢ | 9,008 | Final |
| February 2024 | $127.42 | 1,207.8 | 10.55¢ | 8,974 | Final |
| January 2024 | $171.19 | 1,602.1 | 10.69¢ | 9,027 | Final |
2024 monthly workbook · 2025 monthly workbook · 2026 monthly workbook
2024 disconnections for nonpayment
The utility reported 307 disconnection events in 2024.
One customer account can have multiple events. The rate uses the customer count in the same month of the EIA-112 survey.
| Month | Final notices | Disconnections | Reconnections | Customers | Disconnections per 1,000 customers |
|---|---|---|---|---|---|
| January 2024 | 910 | 5 | 3 | 9,433 | 0.5 |
| February 2024 | 787 | 9 | 7 | 9,427 | 1 |
| March 2024 | 826 | 28 | 22 | 9,426 | 3 |
| April 2024 | 825 | 34 | 27 | 9,438 | 3.6 |
| May 2024 | 814 | 85 | 70 | 9,442 | 9 |
| June 2024 | 613 | 46 | 39 | 9,439 | 4.9 |
| July 2024 | 708 | 32 | 26 | 9,444 | 3.4 |
| August 2024 | 721 | 29 | 21 | 9,459 | 3.1 |
| September 2024 | 697 | 36 | 28 | 9,448 | 3.8 |
| October 2024 | 793 | 3 | 3 | 9,452 | 0.3 |
| November 2024 | 766 | 0 | 0 | 9,462 | 0 |
| December 2024 | 752 | 0 | 0 | 9,473 | 0 |
Reported company changes
Use the EIA merger schedule for context when comparing the utility’s records across years.
| Date | Reported company | Reported new parent | Source |
|---|---|---|---|
| 2023-01-03 | Acquired Ashtabula III, LLC | Unavailable | EIA-861 2023 |
Counties listed in the EIA service directory
How the records were calculated
- Average bill divides residential revenue by reported customers. Usage per customer divides residential kWh by the same count. Revenue per kWh divides total revenue by total kWh. Annual monthly averages divide each annual per-customer total by 12. Individual bills depend on usage, tariff and charges.
- The contribution from revenue per kWh multiplies its change by the average of the two usage figures. The contribution from usage multiplies its change by the average of the two per-kWh figures. These contributions sum to the bill change before display rounding.
- Utility annual rows use observed EIA-861 full-service residential data. A comparison requires matching form part and balancing-authority coverage. Monthly utility rows are reported full-service data from EIA-861M. State and national monthly totals include EIA adjustments. Compare the same calendar month across years to account for seasonality.
- EIA-112 utility records match the EIA utility directory by unambiguous utility name and state. The report counts nonpayment events, including repeats on the same account. Reconnection totals cover events during the same month. State totals include EIA adjustments. An unavailable cell indicates missing or unmatched data.
- Service counties come from the 2025 EIA-861 directory. A listed utility can serve part of a county. Bill averages on a utility page cover its reported customers across the state.
EIA annual workbooks · EIA monthly workbooks · EIA nonpayment survey · EIA price and rate definitions · Download the source-matched figures