Order 2016 Almanac Now - Get 3 FREE Gifts
That's a matter that isThat's a matter that is beyond our skill level; we can only suggest that it could be a break in your waste pipe that carries waste to the public pipe. Over the years (decades), lead pipes, for example, can rust and tree roots can grow into them. If you have a septic tank, its line could also have a rupture. Best to call in an expert.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?