On-Site Liquid Waste Program "SEPTIC"
Proper maintenance of septic systems is important to avoid system failure. A fact sheet developed by WSU Cooperative Properly Managing Your Septic Tank System is available.
Installers of sewage disposal systems are annually permitted by Public Health to ensure proper installation, replacement, alteration, repair or extension of an on-site sewage disposal system. The permitting process includes an application, payment fees and other applicable requirements.
Designers of on-site sewage systems must have an On-site Wastewater Treatment System Designers license from the state Board of Registered Professional Engineers and Land Surveyors to operate in Washington State.