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Electricity Monthly Update

With Data for September 2014  |  Release Date: Nov. 25, 2014  |  Next Release Date: Dec. 23, 2014

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End Use: September 2014


Retail rates/prices and consumption

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 kWh by state



September revenue per kilowatthour averages were up across most of the country, with 40 states higher and just 10 states and the District of Columbia down compared to last year. It also marks the 22nd month in a row of year-over-year national average revenue per kilowatthour increases.

Individually, the states with the largest average revenue per kilowatthour increases were geographically spread out throughout the country. Illinois, Rhode Island and California had the largest increases, all up over 10%. Alaska, Nevada, Connecticut, Florida, Oregon, Hawaii and Mississippi were also up more than 5%. States with the largest year-over-year decreases were West Virginia, down the most atnearly 5%, Maryland down 3% and New Jersey down almost 2%.

Total average revenues per kilowatthour was 10.80 cents in September, 3.5% higher than last year. All sector average revenues were up for the month, with the commercial sector having the largest increase, up 5.1% to 11.10 cents per kilowatthour, followed by the residential sector, up 3.6% to 12.94 cents per kilowatthour.

Total retail sales volumes totaled 323,157 GWh, up 0.7% from last September. Volumes were mixed by sector, with the residential and transportation sectors down slightly from last year and the commercial and industrial sectors up from last year.

Retail sales



As is usually the case, electric industry retail sales volumes in September generally mirrored weather patterns. Volumes were up along the coasts were cooling degree days were higher than last year and lower in the middle of the country where cooling degree days were also lower than last year.

Rhode Island had the largest increase, up over 10% from last year, followed by North Dakota (up 8%), Nevada (up 6%) and Maine (up 5%). North Dakota continues to be an outlier in regards to sales volumes not following weather patterns. The state has seen consistent sales growth due to robust economic growth in the state, even when weather conditions would indicate otherwise.

States that had sales decreases compared to last year line up nicely with those states that experienced lower levels of cooling degree days (CDD). Nebraska, South Dakota and Illinois had the largest sales decreases, all down more than 5%. These states also had very large drops in CDDs in September, all down more than 40%. Missouri, Kentucky, Minnesota and Oklahoma had decreases larger than 3% and also experienced significant declines in CDDs from last year.


Compared to September 2013, cooling degree days were higher along both coasts and lower in the middle of the country. Maine, New York, the District of Columbia, Nevada and Oregon all had CDD increases greater than 25%. All of the other states with CDD increases greater than 5% were near the eastern seaboard or the state of California. A bulls-eye of cooler weather centered over the upper Midwest, with Montana, Wisconsin, South Dakota and Nebraska all having CDD decreases greater than 50% from last year.

Relative to long-term averages, all but seven states were warmer than normal and California, Nevada and Utah had top-10 warmest Septembers on record.

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