Authority over Iowa electric utilities
The IUBÂ regulates the rates and services of investor-owned utilities (IOU), also referred to as rate-regulated utilities. The IUB has limited regulatory authority of rural electric cooperative (REC) and municipal electric utilities in the areas of:
-
service
-
safety
-
engineering
The IUB has very limited authority for non-utility generators.
Iowa Utility Electric Profile (2021)
| Utility Type | # of Utilities | # of Customers | % Customers | MWh Sales (1) | % Sales |
|---|---|---|---|---|---|
| IOU | 2 | 1,209,421 | 72.33% | 58,781,859 | 82.40% |
| Municipal | 136 | 223,719 | 13.38% | 5,422,679 | 7.63% |
| REC (2) | 43 | 238,961 | 14.29% | 7,115,971 | 9.97% |
| Total | 181 | 1,672,101 | 100.00% | 71,340,509 | 100.00% |
Notes: (1) IOU, municipal and REC totals exclude sales for resale. (2) REC totals exclude sales to Generation & Transmission (G&T).  Â
Amana Society Service Company is an investor-owned utility, but it is not rate-regulated due to the number of customers it serves.Â
Source: 2021 Annual Report (IUB 24/7; Form IE-1, Form EC-1, & Form ME-1)
Iowa Electric Profile (Including Non-Utility Generation)
Electric Generation in Iowa by Primary Energy Source
|
Energy Source |
2021 Nameplate |
% of Nameplate Capacity |
2021 |
% of Generation |
|---|---|---|---|---|
|
Coal |
5,754.7 | 25.13% | 22,106,594 | 32.89% |
|
Wind |
11,804.1 | 51.54% | 37,098,274 | 55.20% |
|
Nuclear |
0 | 0.0% | 0 | 0% |
|
Natural Gas |
4,027.6 | 17.58% | 6,463,644 | 9.62% |
|
Hydro |
184.4 | 0.81% | 980,071 | 1.46% |
|
Other & Other Renewables |
24.5 | 0.11% | 201,407 |
0.30% |
|
Petroleum |
990.3 | 4.32% | 132,111 | 0.20% |
|
Solar |
118.4 | 0.52% | 224,906 |
0.33% |
|
Total |
22,904.0 |
100.00% (3) |
67,207,008 |
100.00% (3) |
Notes:Â (1)Â Generation capacity for units greater than 1 MW that are physically located in Iowa;Â includes non-utility generators such as merchant plants, hospitals, colleges/universities, and industrials.Â
(2) Generation from units greater than 1 MW that are physically located in Iowa;Â includes non-utility generators such as merchant plants, hospitals, colleges/universities, and industrials.Â
(3) The percentages above reflect each category's percentage of the total quantity, rounded to two decimal places. Any differences found by manually summing the percent column are due to rounding.
Sources:Â (1) Capacity:Â U.S. Energy Information Administration (EIA) Report 860Â - Final Report 2021
(2) Generation: U.S. Energy Information Administration (EIA) Report 923Â - Final Report 2021
Links to other data and information on the electric utility industry.