Depending on the state where you live, you’ll get your electricity bill from your local electric utility or your electricity provider.  Either way your electricity bill generally has two line items: supply and delivery. The supply charge is for the actual electricity used and this is paid to your electricity provider. The delivery charge is for the transmission and distribution of electricity and this is paid to your local electric utility.  In most states you will receive these charges on one bill, and the company that collects your payment will make sure that the appropriate parties are paid for their services.
As an Exelon company, Constellation Energy is part of one of the biggest — and historically most polluting — corporations in North America. Given Exelon’s vast production energy, ranking on the PERI Toxic 100 list is perhaps not that surprising. The good news is that Exelon is upfront about its room for eco-friendly improvement and make it easy for Constellation customers to go green, too.
Maryland residents are now able to choose who supplies their electricity. (Customers of municipal electric systems and some rural cooperative systems are the exceptions - see "Areas not participating.") Your local utility, now called your electric company, will still deliver the electricity to your home, but you can choose another company to generate the electricity, if other companies are making an offer in your area.
Utility companies are responsible for transmission and delivery of electricity even in energy deregulated parts of Texas and should be contacted in the event of a power outage. Your retail energy supplier may provide you competitive electric rates or exceptional customer service, but they cannot repair power lines or restore your service. In the case of an emergency, contact:

If you’re on a fixed rate tariff with your current supplier, check to see if there’s an exit fee for leaving the contract early. If there is, you’ll need to factor this cost into your price comparison as it could swallow up some of the potential savings. If you can supply your tariff name when you get a quote, we can take your tariff into account when showing you the savings you could make.
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