Commonwealth edison, commonly known by syllabic abbreviation as comed, is the largest electric utility in illinois, and the primary electric provider in chicago and much of northern illinois. Comed is the only chicago electricity provider Chicago electricity rates commonwealth edison is the only electricity provider in chicago, but you can. While all three companies’ rates are comparable or better than comed’s, only 600 residential customers had switched to alternative suppliers as of august, the most recent data available.
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