DeKalb County officials say a blockage of grease and debris is to blame for 2,460 gallons of raw sewage spilling into the Peachtree Branch Creek.

The spill was reported Saturday in the 2900 block of Thornridge Drive, according to county water reports.

DeKalb plans a $1.35 billion upgrade to its water and sewer system in the next year to meet a federal Environmental Protection Agency consent decree.