Mason County, WA septic permits and regulations
Septic systems in Mason County, Washington are permitted by Mason County Public Health under WAC 246-272A.
Septic permit program
- Program type: County Health Department
- Authorized agent: Mason County Health Department
- Own septic program: No, uses Washington state rules
- Local rules beyond the state: No
- Population: 65,726
Permit fee comparison
Average septic permit fee in Mason County: $450. 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 Mason County
- 1 permit fee 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 Mason County
Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for Mason County Public Health. 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
- Okanogan County
- Pacific County
Data checked 2026-05-17. Always confirm requirements with Mason County Public Health before applying.