Flathead County, MT septic permits and regulations
Septic systems in Flathead County, Montana are permitted by Flathead City-County Health Department under ARM 17.36.9 (Circular DEQ-4).
Septic permit program
- Program type: County Health Department
- Authorized agent: Flathead County Health Department
- Own septic program: No, uses Montana state rules
- Local rules beyond the state: No
- Population: 104,357
Permit fee comparison
Average septic permit fee in Flathead County: $211. Montana average: $206.
Local rules
County operates under state-level ARM 17.36.101 through 17.36.952. Contact local health department for any additional county-specific requirements.
What SepticPro has on file for Flathead County
- 7 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 Flathead County
Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for Flathead City-County Health Department. See how SepticPro site plans work.
Other Montana counties
- Beaverhead County
- Big Horn County
- Blaine County
- Broadwater County
- Carbon County
- Carter County
- Cascade County
- Chouteau County
- Custer County
- Daniels County
- Dawson County
- Deer Lodge County
- Fallon County
- Fergus County
- Gallatin County
- Garfield County
- Glacier County
- Golden Valley County
- Granite County
- Hill County
- Jefferson County
- Judith Basin County
- Lake County
- Lewis and Clark County
Data checked 2026-03-16. Always confirm requirements with Flathead City-County Health Department before applying.