Snohomish County, WA septic permits and regulations
Septic systems in Snohomish County, Washington are permitted by Snohomish Health District under WAC 246-272A.
Septic permit program
- Program type: County Health Department
- Authorized agent: Snohomish County Health Department
- Own septic program: No, uses Washington state rules
- Local rules beyond the state: No
- Population: 827,957
Permit fee comparison
Average septic permit fee in Snohomish County: $824. Washington average: $566.
Local rules
County operates under state-level WAC 246-272A (On-Site Sewage Systems). Contact local health department for any additional county-specific requirements.
What SepticPro has on file for Snohomish County
- 15 permit fees with sources
- The agency phone, email and office address
- Setback distances
- Soil and perc test requirements
- Allowed system types
- System design rules
- Inspection requirements
- Maintenance and pumping rules
- Point-of-sale rules
- Installer, designer and pumper licensing
Create a free account to see the full details.
Draw a permit-ready site plan for Snohomish County
Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for Snohomish Health District. See how SepticPro site plans work.
Other Washington counties
- Adams County
- Asotin County
- Benton County
- Chelan County
- Clallam County
- Clark County
- Columbia County
- Cowlitz County
- Douglas County
- Ferry County
- Franklin County
- Garfield County
- Grant County
- Grays Harbor County
- Island County
- Jefferson County
- King County
- Kitsap County
- Kittitas County
- Klickitat County
- Lewis County
- Lincoln County
- Mason County
- Okanogan County
Data checked 2026-03-16. Always confirm requirements with Snohomish Health District before applying.