Lake County, MT septic permits and regulations
Septic systems in Lake County, Montana are permitted by Lake County Environmental Health under ARM 17.36.9 (Circular DEQ-4).
Septic permit program
- Program type: County Health Department
- Authorized agent: Lake County Health Department
- Own septic program: No, uses Montana state rules
- Local rules beyond the state: No
- Population: 31,134
Permit fee comparison
Average septic permit fee in Lake County: $193. 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 Lake 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 Lake County
Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for Lake County Environmental Health. 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
- Flathead County
- Gallatin County
- Garfield County
- Glacier County
- Golden Valley County
- Granite County
- Hill County
- Jefferson County
- Judith Basin County
- Lewis and Clark County
Data checked 2026-03-16. Always confirm requirements with Lake County Environmental Health before applying.