Montana Department of Environmental Quality
Low-interest loans for Montana homeowners to repair or replace failing on-site wastewater treatment systems (septic systems). Available for owner-occupied primary residences with documented system failures. Interest rate fixed at 3% with terms up to 10 years.
Loan at 3% interest for septic system repair or replacement
Data last verified 2026-06-09. How we verify our data.
A grant-savvy contractor in Miles City, MT can handle the paperwork, inspections, and timelines so your funding releases on schedule. Getting matched is free.
You will likely need a contractor to apply
Projects like this almost always need a licensed contractor, and many grants ask for a written estimate as part of your application. Lining up a contractor in Miles City early keeps your application moving.
Get matched with a contractorEach program sets its own contractor rules. Check the official program page for exact requirements.
Deadline: Applications accepted year-round
Ask us. It is free, and a real person answers within a business day.
Email us about this programGrant-approved contractors understand the documentation, inspections, and timelines, so your funding releases on schedule.
Rebates and discounts that stack on top of any grant. Most are free to use.
This is just one of many grants, rebates, and free programs available. Stack them together to maximize your savings.
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