Whether a backflow, a pipe break or from a municipal sewer system, raw sewage is loaded with bacteria, chemicals and other unmentionable yuck. (The smell is not the worst of it)Do not try to clean up, extract or remedy this yourself. Sewage is a biohazard and needs to be handled and disposed of by certified professionals with the experience, knowledge and specialized equipment. Call the pros at SERVPRO, we'll handle that sewage issue and make it "Like it never even happened."