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Electricity Monthly Update

With Data for May 2018  |  Release Date: July 24, 2018  |  Next Release Date: August 24, 2018

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End Use: May 2018


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



Average revenue per kilowatthour figures decreased in 26 states in May compared to last year. The largest declines were found in Arkansas (down almost 9%), Delaware and Maryland (both down over 6%), and New Mexico (down almost 6%). Twenty four states and the District of Columbia increased revenue per kilowatthour compared to last year, led by Massachusetts (up by 15%), Rhode Island (up 14%), Hawaii (up over 12%), and New Hampshire (up over 6%).


Total average revenues per kilowatthour were up 0.5% to 10.42 cents in May compared to last year. Average revenues for the Residential sector rose the most, 1.1% over May last year. The Industrial sector rose only slightly, by 0.1%. The Transportation and Commercial sectors each fell from May last year, by 1.3% and 0.7%, respectively. Retail sales were up overall by 2.7% for the month. The Residential sector rose the highest of the four sectors, increasing by 4.4%. The Commercial, Industrial, and Transportation sectors were each up slightly, by 1.9%, 1.6%, and 1.4%, respectively.

Retail sales



State retail sales volumes were down in 11 states in May compared to last year. Massachusetts showed the largest year-over-year decline, down 15%. Florida had the next largest decline, down just over 8%. Thirty nine states and the District of Columbia had retail sales volume increases in May, led by Oklahoma (up 17%), Kansas (up almost 12%), and Illinois and Delaware (both up over 10%).


Cooling Degree Days (CDD) were down in 11 states compared to last May. California had the largest decrease from last year, down almost 75%, or a drop of 38 cooling-degree days. Three other states had a 50%-or-greater drop in CDDs over May 2017: Maine (down almost 67%), Oregon (down almost 61%), and New Hampshire (down 50%). Thirty two states and the District of Columbia had a greater percentage of CDDs than May 2017. Eight states, all in the upper Mid-West and West, had a greater-than-200% increase in CDDs over last year: Wisconsin, Colorado, Minnesota, North Dakota, Michigan, Wyoming, South Dakota, and Illinois. This was in response to an unusually warm month in those parts of the country.

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