TMI Unit 1 generates 837 megawatts of zero-emissions energy: enough carbon-free electricity to power 800,000 homes. TMI is so named because it is located three miles from Harrisburg International Airport. Exelon Generation purchased Three Mile Island (TMI) Unit 1 20 years after the Unit 2 accident. Unit 2 is owned by First Energy Company
We've been part of Londonderry Township and the Middletown area for more than 40 years. We provide hundreds of well-paying jobs and millions of dollars in economic support, including about $1 million in taxes annually for schools, roads and other public services. TMI's employees spend more than 100 volunteer hours and donate more than $300,000 to local charities and organizations annually.