Energy company says letter was sent in error

Buffalo Grove, Arlington Heights and Palatine officials are warning residents about a letter some in the community are receiving that makes false claims about the villages' electrical aggregation program.

In response, Spark Energy said the letter was intended only for Chicago residents and it was sent to suburban homes in error. The letter from Spark Energy stated that the suburban aggregation program ends in August, when it fact it ends in May 2017. It's actually Chicago's electrical aggregation program that ends in August, Spark said in a news release Wednesday night.

The letter encourages residents to switch to Spark Energy, which is charging 6.79 cents per kilowatt hour, but that is more than the current suburban aggregation rate of 6.53 cents per kilowatt hour.