Interstate Power and Light is an electric utility company that serves over 500,000 customers in the state of Iowa. The company is a subsidiary of Alliant Energy Corporation and has been operating in Iowa since the early 1900s. Interstate Power and Light generates electricity from a variety of sources including natural gas, coal, wind, and solar. The company operates a number of power plants throughout the state, including the Lansing Generating Station, the Ottumwa Generating Station, and the Prairie Creek Generating Station. In addition to generating and distributing electricity, Interstate Power and Light also provides energy efficiency programs and services to help customers reduce their energy usage and save money on their bills.
alliantenergy.com
Interstate Power and Light - Iowa's energy comes from coal, wind, natural gas, biomass, and hydroelectric. Coal is the largest source of electricity, providing 48% of Interstate Power and Light - Iowa's energy. Wind is the second largest source, making up 37%. Natural Gas provides 12% of Interstate Power and Light - Iowa's electricity. Biomass provides 2% of Interstate Power and Light - Iowa's electricity. Hydroelectric provides 1% of Interstate Power and Light - Iowa's electricity.
48%
Coal
37%
Wind
12%
Natural Gas
2%
Biomass
1%
Hydroelectric
The average electricity rate for Interstate Power and Light - Iowa customers is 16.84 cents/kWh. Interstate Power and Light - Iowa has several different electricity rates for residential customers, as shown in the table below.
| Rate Name | Rate Type | Cost Per kWh |
| Electric Residential Service - Optional Demand Rate | TOU | 7¢ to 1777¢ |
| Electric Residential Service Optional Two-Part Time of Day | TOU | 15¢ to 27¢ |
| Electric Residential Service Optional Three-Part Time of Day | TOU | 11¢ to 29¢ |
| Electric Residential Service Usage - 400 [Net Metering Pilot] | Fixed | 9¢ to 17¢ |
| Electric Residential Service | Fixed | 15¢ to 18¢ |
In 2021, the average Interstate Power and Light - Iowa customer lost electricity one time for a duration of 131 minutes. In total, the average Interstate Power and Light - Iowa customer had their electricity out for about 107 minutes during the whole year.
Credited to customer's next bill at retail rate; excess credits cashed out annually at avoided cost rate.
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