DeKalb County officials say a back up of debris is to blame for 4,675 gallons of raw sewage spilling into the North Fork of the Peachtree Creek.

The spill was reported Wednesday in the 2100 block of Jonathon Lane near Briarwood Park, according to county water reports.

DeKalb plans to start $1.35 billion in water and sewer system upgrades this spring to meet a federal Environmental Protection Agency consent decree.