It's confirmed regarding my clogged kitchen sink. [View all]

It isn't an amalgam of grease (I never pour grease down the drain), or bits of stuff that got past my strainer, etc.

There is an incredible back-up of street sludge from the public water system. It's black, thick, and putrid.

My landlord used his super-snake and found it nearly impossible to break up the clog. He's getting more tools now.