Area media outlets report that U.S. District Judge Richard Gergel in Charleston sentenced 41-year-old Shonni Abernathy on Wednesday.
Abernathy pleaded guilty last year to conspiring to manufacture 50 grams or more of methamphetamine and manufacturing methamphetamine.
Three people died in the fire in a Goose Creek apartment complex that resulted from an explosion on May 31, 2012.
The victims included Abernathy's 19-year-old daughter, Morgan, and a cousin she was babysitting, 4-year-old Sammy Garbe. Sixty-nine-year-old Joseph Raeth died in a neighboring apartment unit.
Abernathy is the last of four co-defendants sentenced in the case.