Chapter 246-272A WAC On-site Sewage Systems
Washington State Board of Health adopted proposed changes to chapter 246-272A, On-site Sewage Systems, on January 10, 2024. The adopted revisions incorporate recommendations from the Onsite Rule Revision Committee and other issues raised by interested parties.
Based on input from interested parties, the On-site Sewage System rule becomes effective with a staggered timeline.
- Effective April 1, 2024: Changes to WAC 246-272A-0110
- Effective February 1, 2025: Maintenance Service Provider approval requirement
- Effective April 1, 2025: All provisions of the rule excluding changes to WAC 246-272A-0110, the Maintenance Service Provider approval requirement, and Property Transfer Inspection requirement
- Effective February 1, 2027: Property Transfer Inspection requirement
Key changes to the rule include:
- Local Management Plans
- Field Verification of Proprietary Products
- Property Transfer Inspection
- Remediation
- Repairs
- Minimum Lot Sizes
- Approval of Maintenance Service Providers
Supporting Documents
Concise Explanatory Statement (PDF)
Summary of Public Comments and Staff Responses and Recommendations (PDF)
Small Business Economic Impact Statement (PDF)
Timeline
March 2018, CR-101 Filed
May 2018, Formed Rule Revision Committee
June 2018 - August 2019, Rule Revision Committee Meetings
August - October 2019, Informal Comment Period
November 2019, State Board of Health Update
October 2023, CR-102 Filed
January 2024, State Board of Health Hearing & Public Hearing
March 1, 2024, CR-103 Filed
Rule Effective Dates, See staggered timeline above.
Stay Informed
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Rule Revision Contacts
Katitza Holthaus, Regulatory Affairs Manager
Jeremy Simmons, Wastewater Program Manager, 360-236-3346