On-Site Liquid Waste Program "SEPTIC"

Septic system designs (on-site sewage disposal) are reviewed for compliance with the Okanogan County Public Health District (OCPHD) On-Site Sewage Disposal Regulations, then inspected and permitted after installation. Permit fees for on-site sewage (OSS) disposal systems vary based on the size and type of system. The Okanogan County Public Health District enforces liquid waste regulations for septic systems less than 3,500 gallons per day. The Department of Health and the Department of Ecology enforce regulations for larger sewage systems.

Attention: Realtors and On-Site Septic Professionals
WAC 246-272A revision adopted March 1, 2024

In January 2018, the State Board of Health directed the department to begin the process of revising the On-site Sewage System Rule, Chapter 246-272A WAC. The department concluded rule revision in late 2023 and reported to the State Board of Health in January 2024.
After edits, the State Board of Health filed the CR-103, Rulemaking order, to adopt the rule on March 1, 2024. The updated rule, a summary of changes, and effective dates for the rule can be accessed on the Washington State Department of Health On-site Sewage System Rule Revision webpage.

Concise Explanatory Statement - Chapter 246-272A WAC, On-site Sewage Systems.pdf

CR-103P - WAC 246-272A.pdf

Proper maintenance of septic systems is important to avoid system failure. In addition to reference on our Floods & Mold or Environmental Health: Liquid Waste reference, here are links to helpful fact sheets:
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. The Design & Construction Standards for On-Site Sewage Systems document provides guidance for on-site sewage systems in Okanogan County. 

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 (OSS) disposal system. The permitting process includes an OSS Permit Application, process fee and other applicable requirements.  Not sure which application you need? Review our On-Site Sewage Disposal / Sewage System process comparison table, or call us at (509) 422-7140.