In this section, we look at what electricity costs and how much is purchased. Charges for retail electric service are based primarily on rates approved by state regulators. However, a number of states have allowed retail marketers to compete to serve customers and these competitive retail suppliers offer electricity at a market-based price.
EIA does not directly collect retail electricity rates or prices. However, using data collected on retail sales revenues and volumes, we calculate average retail revenues per kWh as a proxy for retail rates and prices. Retail sales volumes are presented as a proxy for end-use electricity consumption.
Average revenue per kilowatthour figures decreased in twenty-one states and the District of Columbia in September compared to last year. The largest decline was found in Missouri, down by almost 6%. Twenty-eight states increased revenue per kilowatthour compared to last year, led by New Mexico (up over 13%). One state, Kentucky, had no change from last September.
|Average Revenues/Sales (¢/kWh)||Retail Sales (thousand MWh)|
|End-use sector||September 2020||Change fromSeptember 2019||September 2020||Change fromSeptember 2019||Year to Date|
|Source: U.S. Energy Information Administration|
Total average revenues per kilowatthour (kWh) rose by 2.3% in September to 11.07 cents/kWh. The Transportation sector rose the most from last September, up by 6.4%. The Residential and Commercial sectors followed, each up by 3.0% and 1.0%, respectively. The Industrial sector fell slightly, down by 0.7%. Total retail sales were down by 6.7% from September 2019. All of the four sectors showed a drop in retail sales from a year ago. The Transportation sector dropped the most, down by 27%. The Industrial and Commercial sectors fell 10% and 8.1%, respectively. The Residential sector dropped the least amount of the four sectors, down by 3%.
State retail sales volumes were down in thirty-nine states and the District of Columbia in September compared to last year. The District of Columbia had the largest year-over-year decline, down almost 16%. Oklahoma and Wyoming followed, dropping by almost 15% and 14%, respectively. Eleven states had retail sales volume increases in September, led by Maine, up by almost 7%.
Cooling Degree Days (CDD) were down in thirty-five states and the District of Columbia compared to last September. The greatest percentage drop in CDDs occurred in Wisconsin, which was down 84%. Five states had over-60-percent drops in CDDs: Missouri (down almost 68%), Michigan (down almost 68%), Kansas (down over 65%), Illinois (down 63%), and Oklahoma (down 60%). Fourteen states had an increase in CDDs in September. Maine had the largest percent increase in CDDs, up over 500% from September 2019. Vermont, New Hampshire, and Oregon followed, all with percent increases of over 100%.