Solids and Food Waste

In wastewater, solids capable of settling can restrict or block flow in sewer lines. A company that discharges solids which cause a sewage backup is liable for any damages.

King County prohibits discharge to the sewer of materials such as ashes, sand, grass, and gravel. Industrial wastewater must contain less than 7 milliliters per liter of solids capable of settling. Food waste, including food-grinder waste, must be capable of passing through a 1/4-inch sieve.