Acceptable wastes
A description of the types of septage that are accepted and not accepted at the septage disposal facility.
We accept the following types of septage:
- Domestic septage (defined as any liquid or solid material removed from a septic tank, cesspool, portable toilet, Type III marine sanitation device, or similar treatment works that receives only domestic sewage)
- Chemical toilet waste
- Cesspool waste
- Privy contents
- Liquid waste collected from the collection system that serves the South, West Point, Carnation, or Brightwater treatment plants
- Commercial wastes that have been pre-approved by the King County Industrial Waste Program
*For a complete list of definitions of the types of septage we accept, see page 5 of the Annual Septage Disposal Permit.
We don’t accept the following types of septage:
- Non-domestic commercial wastes received from a customer without a King County Industrial Waste pre-approval number
- Hazardous or dangerous waste, as defined in King County Code 28.82.330