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Electricity Monthly Update

With Data for September 2018  |  Release Date: Nov. 27, 2018  |  Next Release Date: Dec. 26, 2018

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End Use: September 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 28 states in September compared to last year. The largest declines were found in Arkansas (down almost 12%), South Carolina (down almost 8%), and Louisiana (down over 7%). Nineteen states increased revenue per kilowatthour compared to last year, Rhode Island (up almost 17%), Hawaii (up over 14%), and Vermont (in excess of 9%). Three states and the District of Columbia had no change in average revenue per kilowatthour figures from last year.


Total average revenues per kilowatthour in September 2018 were down 1.5% from September 2017, to 10.70. Average revenues for the Residential, Commercial, and Industrial sectors each dropped from a year ago, down by 2.0%, 3.2% and 1.1%, respectively. The Transportation sector rose by 2.9% from September last year. Total retail sales were up by 3.2% from September last year. The Residential sector rose the most, increasing by 8.1%. The Transportation sector followed, rising by 4.9%, and the Commercial sector was up by 2.3%. The Industrial sector dropped by 2.8%.

Retail sales



State retail sales volumes were down in 14 states in September compared to last year. California showed the largest year-over-year decline, down 17%. Oregon and Washington had the next largest decline, down by 7% and 6%, respectively. Thirty six states and the District of Columbia had retail sales volume increases in September, led by Pennsylvania, Virginia, and Georgia, each rising by 13%.


Cooling Degree Days (CDD) were down in 9 states compared to last September. Washington had the largest decrease from last year, down over 69%. Three other states had a greater-than-50% increase in CDDs from last year: Montana (up 68%), Oregon (up 62%), and Idaho (up 55%). Forty states and the District of Columbia had a greater percentage of CDDs than September 2017. Three states had a 70%-or-greater increase in CDDs over last year: West Virginia (up 100%), Tennessee (up 74%), and Virginia (up 70%). Seven other states had a greater-than-50% increase in CDDs from last year: Kentucky (up 69%), Ohio (up 66%), Georgia (up 66%), North Carolina (up 63%), Maryland (up 63%), Pennsylvania (up 55%), and Alabama (up 55%).

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