A PEST CONTROL OPERATOR (PCO) is an individual who:
Performs the service of inspecting a building for wood destroying organisms or other structural
invading pests; evaluates their damage and identifies conditions conducive to their infestation.
Determines treatment specifications for a WDO or pest, based on the inspection.
Performs the treatment.
A STRUCTURAL PEST INSPECTOR: SPI is an individual who:
Performs the service of inspecting a building for ONLY wood destroying organisms,
evaluates their damage, or conditions conducive to their infestation.
This service is typically performed for a real estate transfer.
DOES NOT determine treatment specifications for a WDO.
DOES NOT perform the treatment.
To verify licensing contact the Washington State Department of Agriculture by clicking on this link: WSDA